diff --git a/Marlin/src/Marlin.cpp b/Marlin/src/Marlin.cpp
index 6eb0ee164d..dcd8599af0 100644
--- a/Marlin/src/Marlin.cpp
+++ b/Marlin/src/Marlin.cpp
@@ -31,6 +31,7 @@
 #include "Marlin.h"
 
 #include "lcd/ultralcd.h"
+#include "module/motion.h"
 #include "module/planner.h"
 #include "module/stepper.h"
 #include "module/endstops.h"
@@ -43,7 +44,10 @@
 #include <math.h>
 #include "libs/nozzle.h"
 #include "libs/duration_t.h"
+
+#include "gcode/gcode.h"
 #include "gcode/parser.h"
+#include "gcode/queue.h"
 
 #if HAS_BUZZER && DISABLED(LCD_USE_I2C_BUZZER)
   #include "libs/buzzer.h"
@@ -58,6 +62,10 @@
   #include "feature/mbl/mesh_bed_leveling.h"
 #endif
 
+#if (ENABLED(SWITCHING_EXTRUDER) && !DONT_SWITCH) || ENABLED(SWITCHING_NOZZLE)
+  #include "module/tool_change.h"
+#endif
+
 #if ENABLED(BEZIER_CURVE_SUPPORT)
   #include "module/planner_bezier.h"
 #endif
@@ -136,22 +144,6 @@
 
 bool Running = true;
 
-/**
- * Cartesian Current Position
- *   Used to track the logical position as moves are queued.
- *   Used by 'line_to_current_position' to do a move after changing it.
- *   Used by 'SYNC_PLAN_POSITION_KINEMATIC' to update 'planner.position'.
- */
-float current_position[XYZE] = { 0.0 };
-
-/**
- * Cartesian Destination
- *   A temporary position, usually applied to 'current_position'.
- *   Set with 'gcode_get_destination' or 'set_destination_to_current'.
- *   'line_to_destination' sets 'current_position' to 'destination'.
- */
-float destination[XYZE] = { 0.0 };
-
 /**
  * axis_homed
  *   Flags that each linear axis was homed.
@@ -163,38 +155,6 @@ float destination[XYZE] = { 0.0 };
  */
 bool axis_homed[XYZ] = { false }, axis_known_position[XYZ] = { false };
 
-/**
- * GCode line number handling. Hosts may opt to include line numbers when
- * sending commands to Marlin, and lines will be checked for sequentiality.
- * M110 N<int> sets the current line number.
- */
-static long gcode_N, gcode_LastN, Stopped_gcode_LastN = 0;
-
-/**
- * GCode Command Queue
- * A simple ring buffer of BUFSIZE command strings.
- *
- * Commands are copied into this buffer by the command injectors
- * (immediate, serial, sd card) and they are processed sequentially by
- * the main loop. The process_next_command function parses the next
- * command and hands off execution to individual handler functions.
- */
-uint8_t commands_in_queue = 0; // Count of commands in the queue
-static uint8_t cmd_queue_index_r = 0, // Ring buffer read position
-               cmd_queue_index_w = 0; // Ring buffer write position
-#if ENABLED(M100_FREE_MEMORY_WATCHER)
-  char command_queue[BUFSIZE][MAX_CMD_SIZE];  // Necessary so M100 Free Memory Dumper can show us the commands and any corruption
-#else                                         // This can be collapsed back to the way it was soon.
-static char command_queue[BUFSIZE][MAX_CMD_SIZE];
-#endif
-
-/**
- * Next Injected Command pointer. NULL if no commands are being injected.
- * Used by Marlin internally to ensure that commands initiated from within
- * are enqueued ahead of any pending serial or sd card commands.
- */
-static const char *injected_commands_P = NULL;
-
 #if ENABLED(TEMPERATURE_UNITS_SUPPORT)
   TempUnit input_temp_units = TEMPUNIT_C;
 #endif
@@ -213,14 +173,12 @@ static const float homing_feedrate_mm_s[] PROGMEM = {
 };
 FORCE_INLINE float homing_feedrate(const AxisEnum a) { return pgm_read_float(&homing_feedrate_mm_s[a]); }
 
-float feedrate_mm_s = MMM_TO_MMS(1500.0);
 static float saved_feedrate_mm_s;
 int16_t feedrate_percentage = 100, saved_feedrate_percentage,
     flow_percentage[EXTRUDERS] = ARRAY_BY_EXTRUDERS1(100);
 
 // Initialized by settings.load()
-bool axis_relative_modes[] = AXIS_RELATIVE_MODES,
-     volumetric_enabled;
+bool volumetric_enabled;
 float filament_size[EXTRUDERS], volumetric_multiplier[EXTRUDERS];
 
 #if HAS_WORKSPACE_OFFSET
@@ -239,13 +197,6 @@ float filament_size[EXTRUDERS], volumetric_multiplier[EXTRUDERS];
   #endif
 #endif
 
-// Software Endstops are based on the configured limits.
-#if HAS_SOFTWARE_ENDSTOPS
-  bool soft_endstops_enabled = true;
-#endif
-float soft_endstop_min[XYZ] = { X_MIN_BED, Y_MIN_BED, Z_MIN_POS },
-      soft_endstop_max[XYZ] = { X_MAX_BED, Y_MAX_BED, Z_MAX_POS };
-
 #if FAN_COUNT > 0
   int16_t fanSpeeds[FAN_COUNT] = { 0 };
   #if ENABLED(PROBING_FANS_OFF)
@@ -254,12 +205,6 @@ float soft_endstop_min[XYZ] = { X_MIN_BED, Y_MIN_BED, Z_MIN_POS },
   #endif
 #endif
 
-// The active extruder (tool). Set with T<extruder> command.
-uint8_t active_extruder = 0;
-
-// Relative Mode. Enable with G91, disable with G90.
-static bool relative_mode = false;
-
 // For M109 and M190, this flag may be cleared (by M108) to exit the wait loop
 volatile bool wait_for_heatup = true;
 
@@ -268,11 +213,6 @@ volatile bool wait_for_heatup = true;
   volatile bool wait_for_user = false;
 #endif
 
-const char axis_codes[XYZE] = { 'X', 'Y', 'Z', 'E' };
-
-// Number of characters read in the current line of serial input
-static int serial_count = 0;
-
 // Inactivity shutdown
 millis_t previous_cmd_ms = 0;
 static millis_t max_inactive_time = 0;
@@ -285,8 +225,6 @@ static millis_t stepper_inactive_time = (DEFAULT_STEPPER_DEACTIVE_TIME) * 1000UL
   Stopwatch print_job_timer = Stopwatch();
 #endif
 
-static uint8_t target_extruder;
-
 #if HAS_BED_PROBE
   float zprobe_zoffset; // Initialized by settings.load()
 #endif
@@ -423,8 +361,6 @@ float cartes[XYZ] = { 0 };
   #endif
 #endif
 
-static bool send_ok[BUFSIZE];
-
 #if HAS_SERVOS
   HAL_SERVO_LIB servo[NUM_SERVOS];
   #define MOVE_SERVO(I, P) servo[I].move(P)
@@ -461,21 +397,6 @@ static bool send_ok[BUFSIZE];
   static WorkspacePlane workspace_plane = PLANE_XY;
 #endif
 
-FORCE_INLINE float pgm_read_any(const float *p) { return pgm_read_float_near(p); }
-FORCE_INLINE signed char pgm_read_any(const signed char *p) { return pgm_read_byte_near(p); }
-
-#define XYZ_CONSTS_FROM_CONFIG(type, array, CONFIG) \
-  static const PROGMEM type array##_P[XYZ] = { X_##CONFIG, Y_##CONFIG, Z_##CONFIG }; \
-  static inline type array(AxisEnum axis) { return pgm_read_any(&array##_P[axis]); } \
-  typedef void __void_##CONFIG##__
-
-XYZ_CONSTS_FROM_CONFIG(float, base_min_pos,   MIN_POS);
-XYZ_CONSTS_FROM_CONFIG(float, base_max_pos,   MAX_POS);
-XYZ_CONSTS_FROM_CONFIG(float, base_home_pos,  HOME_POS);
-XYZ_CONSTS_FROM_CONFIG(float, max_length,     MAX_LENGTH);
-XYZ_CONSTS_FROM_CONFIG(float, home_bump_mm,   HOME_BUMP_MM);
-XYZ_CONSTS_FROM_CONFIG(signed char, home_dir, HOME_DIR);
-
 /**
  * ***************************************************************************
  * ******************************** FUNCTIONS ********************************
@@ -484,10 +405,6 @@ XYZ_CONSTS_FROM_CONFIG(signed char, home_dir, HOME_DIR);
 
 void stop();
 
-void get_available_commands();
-void process_next_command();
-void prepare_move_to_destination();
-
 void get_cartesian_from_steppers();
 void set_current_from_steppers_for_axis(const AxisEnum axis);
 
@@ -497,112 +414,11 @@ void set_current_from_steppers_for_axis(const AxisEnum axis);
 
 void report_current_position();
 
-/**
- * sync_plan_position
- *
- * Set the planner/stepper positions directly from current_position with
- * no kinematic translation. Used for homing axes and cartesian/core syncing.
- */
-void sync_plan_position() {
-  #if ENABLED(DEBUG_LEVELING_FEATURE)
-    if (DEBUGGING(LEVELING)) DEBUG_POS("sync_plan_position", current_position);
-  #endif
-  planner.set_position_mm(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], current_position[E_AXIS]);
-}
-inline void sync_plan_position_e() { planner.set_e_position_mm(current_position[E_AXIS]); }
-
-#if IS_KINEMATIC
-
-  inline void sync_plan_position_kinematic() {
-    #if ENABLED(DEBUG_LEVELING_FEATURE)
-      if (DEBUGGING(LEVELING)) DEBUG_POS("sync_plan_position_kinematic", current_position);
-    #endif
-    planner.set_position_mm_kinematic(current_position);
-  }
-  #define SYNC_PLAN_POSITION_KINEMATIC() sync_plan_position_kinematic()
-
-#else
-
-  #define SYNC_PLAN_POSITION_KINEMATIC() sync_plan_position()
-
-#endif
-
 #if ENABLED(DIGIPOT_I2C)
   extern void digipot_i2c_set_current(uint8_t channel, float current);
   extern void digipot_i2c_init();
 #endif
 
-/**
- * Inject the next "immediate" command, when possible, onto the front of the queue.
- * Return true if any immediate commands remain to inject.
- */
-static bool drain_injected_commands_P() {
-  if (injected_commands_P != NULL) {
-    size_t i = 0;
-    char c, cmd[30];
-    strncpy_P(cmd, injected_commands_P, sizeof(cmd) - 1);
-    cmd[sizeof(cmd) - 1] = '\0';
-    while ((c = cmd[i]) && c != '\n') i++; // find the end of this gcode command
-    cmd[i] = '\0';
-    if (enqueue_and_echo_command(cmd))     // success?
-      injected_commands_P = c ? injected_commands_P + i + 1 : NULL; // next command or done
-  }
-  return (injected_commands_P != NULL);    // return whether any more remain
-}
-
-/**
- * Record one or many commands to run from program memory.
- * Aborts the current queue, if any.
- * Note: drain_injected_commands_P() must be called repeatedly to drain the commands afterwards
- */
-void enqueue_and_echo_commands_P(const char * const pgcode) {
-  injected_commands_P = pgcode;
-  drain_injected_commands_P(); // first command executed asap (when possible)
-}
-
-/**
- * Clear the Marlin command queue
- */
-void clear_command_queue() {
-  cmd_queue_index_r = cmd_queue_index_w;
-  commands_in_queue = 0;
-}
-
-/**
- * Once a new command is in the ring buffer, call this to commit it
- */
-inline void _commit_command(bool say_ok) {
-  send_ok[cmd_queue_index_w] = say_ok;
-  if (++cmd_queue_index_w >= BUFSIZE) cmd_queue_index_w = 0;
-  commands_in_queue++;
-}
-
-/**
- * Copy a command from RAM into the main command buffer.
- * Return true if the command was successfully added.
- * Return false for a full buffer, or if the 'command' is a comment.
- */
-inline bool _enqueuecommand(const char* cmd, bool say_ok=false) {
-  if (*cmd == ';' || commands_in_queue >= BUFSIZE) return false;
-  strcpy(command_queue[cmd_queue_index_w], cmd);
-  _commit_command(say_ok);
-  return true;
-}
-
-/**
- * Enqueue with Serial Echo
- */
-bool enqueue_and_echo_command(const char* cmd, bool say_ok/*=false*/) {
-  if (_enqueuecommand(cmd, say_ok)) {
-    SERIAL_ECHO_START();
-    SERIAL_ECHOPAIR(MSG_ENQUEUEING, cmd);
-    SERIAL_CHAR('"');
-    SERIAL_EOL();
-    return true;
-  }
-  return false;
-}
-
 void setup_killpin() {
   #if HAS_KILL
     SET_INPUT_PULLUP(KILL_PIN);
@@ -784,305 +600,6 @@ void servo_init() {
 
 #endif // HAS_COLOR_LEDS
 
-void gcode_line_error(const char* err, bool doFlush = true) {
-  SERIAL_ERROR_START();
-  serialprintPGM(err);
-  SERIAL_ERRORLN(gcode_LastN);
-  //Serial.println(gcode_N);
-  if (doFlush) FlushSerialRequestResend();
-  serial_count = 0;
-}
-
-/**
- * Get all commands waiting on the serial port and queue them.
- * Exit when the buffer is full or when no more characters are
- * left on the serial port.
- */
-inline void get_serial_commands() {
-  static char serial_line_buffer[MAX_CMD_SIZE];
-  static bool serial_comment_mode = false;
-
-  // If the command buffer is empty for too long,
-  // send "wait" to indicate Marlin is still waiting.
-  #if defined(NO_TIMEOUTS) && NO_TIMEOUTS > 0
-    static millis_t last_command_time = 0;
-    const millis_t ms = millis();
-    if (commands_in_queue == 0 && !MYSERIAL.available() && ELAPSED(ms, last_command_time + NO_TIMEOUTS)) {
-      SERIAL_ECHOLNPGM(MSG_WAIT);
-      last_command_time = ms;
-    }
-  #endif
-
-  /**
-   * Loop while serial characters are incoming and the queue is not full
-   */
-  while (commands_in_queue < BUFSIZE && MYSERIAL.available() > 0) {
-
-    char serial_char = MYSERIAL.read();
-
-    /**
-     * If the character ends the line
-     */
-    if (serial_char == '\n' || serial_char == '\r') {
-
-      serial_comment_mode = false; // end of line == end of comment
-
-      if (!serial_count) continue; // skip empty lines
-
-      serial_line_buffer[serial_count] = 0; // terminate string
-      serial_count = 0; //reset buffer
-
-      char* command = serial_line_buffer;
-
-      while (*command == ' ') command++; // skip any leading spaces
-      char *npos = (*command == 'N') ? command : NULL, // Require the N parameter to start the line
-           *apos = strchr(command, '*');
-
-      if (npos) {
-
-        bool M110 = strstr_P(command, PSTR("M110")) != NULL;
-
-        if (M110) {
-          char* n2pos = strchr(command + 4, 'N');
-          if (n2pos) npos = n2pos;
-        }
-
-        gcode_N = strtol(npos + 1, NULL, 10);
-
-        if (gcode_N != gcode_LastN + 1 && !M110) {
-          gcode_line_error(PSTR(MSG_ERR_LINE_NO));
-          return;
-        }
-
-        if (apos) {
-          byte checksum = 0, count = 0;
-          while (command[count] != '*') checksum ^= command[count++];
-
-          if (strtol(apos + 1, NULL, 10) != checksum) {
-            gcode_line_error(PSTR(MSG_ERR_CHECKSUM_MISMATCH));
-            return;
-          }
-          // if no errors, continue parsing
-        }
-        else {
-          gcode_line_error(PSTR(MSG_ERR_NO_CHECKSUM));
-          return;
-        }
-
-        gcode_LastN = gcode_N;
-        // if no errors, continue parsing
-      }
-      else if (apos) { // No '*' without 'N'
-        gcode_line_error(PSTR(MSG_ERR_NO_LINENUMBER_WITH_CHECKSUM), false);
-        return;
-      }
-
-      // Movement commands alert when stopped
-      if (IsStopped()) {
-        char* gpos = strchr(command, 'G');
-        if (gpos) {
-          const int codenum = strtol(gpos + 1, NULL, 10);
-          switch (codenum) {
-            case 0:
-            case 1:
-            case 2:
-            case 3:
-              SERIAL_ERRORLNPGM(MSG_ERR_STOPPED);
-              LCD_MESSAGEPGM(MSG_STOPPED);
-              break;
-          }
-        }
-      }
-
-      #if DISABLED(EMERGENCY_PARSER)
-        // If command was e-stop process now
-        if (strcmp(command, "M108") == 0) {
-          wait_for_heatup = false;
-          #if ENABLED(ULTIPANEL)
-            wait_for_user = false;
-          #endif
-        }
-        if (strcmp(command, "M112") == 0) kill(PSTR(MSG_KILLED));
-        if (strcmp(command, "M410") == 0) { quickstop_stepper(); }
-      #endif
-
-      #if defined(NO_TIMEOUTS) && NO_TIMEOUTS > 0
-        last_command_time = ms;
-      #endif
-
-      // Add the command to the queue
-      _enqueuecommand(serial_line_buffer, true);
-    }
-    else if (serial_count >= MAX_CMD_SIZE - 1) {
-      // Keep fetching, but ignore normal characters beyond the max length
-      // The command will be injected when EOL is reached
-    }
-    else if (serial_char == '\\') {  // Handle escapes
-      if (MYSERIAL.available() > 0) {
-        // if we have one more character, copy it over
-        serial_char = MYSERIAL.read();
-        if (!serial_comment_mode) serial_line_buffer[serial_count++] = serial_char;
-      }
-      // otherwise do nothing
-    }
-    else { // it's not a newline, carriage return or escape char
-      if (serial_char == ';') serial_comment_mode = true;
-      if (!serial_comment_mode) serial_line_buffer[serial_count++] = serial_char;
-    }
-
-  } // queue has space, serial has data
-}
-
-#if ENABLED(SDSUPPORT)
-
-  /**
-   * Get commands from the SD Card until the command buffer is full
-   * or until the end of the file is reached. The special character '#'
-   * can also interrupt buffering.
-   */
-  inline void get_sdcard_commands() {
-    static bool stop_buffering = false,
-                sd_comment_mode = false;
-
-    if (!IS_SD_PRINTING) return;
-
-    /**
-     * '#' stops reading from SD to the buffer prematurely, so procedural
-     * macro calls are possible. If it occurs, stop_buffering is triggered
-     * and the buffer is run dry; this character _can_ occur in serial com
-     * due to checksums, however, no checksums are used in SD printing.
-     */
-
-    if (commands_in_queue == 0) stop_buffering = false;
-
-    uint16_t sd_count = 0;
-    bool card_eof = card.eof();
-    while (commands_in_queue < BUFSIZE && !card_eof && !stop_buffering) {
-      const int16_t n = card.get();
-      char sd_char = (char)n;
-      card_eof = card.eof();
-      if (card_eof || n == -1
-          || sd_char == '\n' || sd_char == '\r'
-          || ((sd_char == '#' || sd_char == ':') && !sd_comment_mode)
-      ) {
-        if (card_eof) {
-          SERIAL_PROTOCOLLNPGM(MSG_FILE_PRINTED);
-          card.printingHasFinished();
-          #if ENABLED(PRINTER_EVENT_LEDS)
-            LCD_MESSAGEPGM(MSG_INFO_COMPLETED_PRINTS);
-            set_led_color(0, 255, 0); // Green
-            #if HAS_RESUME_CONTINUE
-              enqueue_and_echo_commands_P(PSTR("M0")); // end of the queue!
-            #else
-              safe_delay(1000);
-            #endif
-            set_led_color(0, 0, 0);   // OFF
-          #endif
-          card.checkautostart(true);
-        }
-        else if (n == -1) {
-          SERIAL_ERROR_START();
-          SERIAL_ECHOLNPGM(MSG_SD_ERR_READ);
-        }
-        if (sd_char == '#') stop_buffering = true;
-
-        sd_comment_mode = false; // for new command
-
-        if (!sd_count) continue; // skip empty lines (and comment lines)
-
-        command_queue[cmd_queue_index_w][sd_count] = '\0'; // terminate string
-        sd_count = 0; // clear sd line buffer
-
-        _commit_command(false);
-      }
-      else if (sd_count >= MAX_CMD_SIZE - 1) {
-        /**
-         * Keep fetching, but ignore normal characters beyond the max length
-         * The command will be injected when EOL is reached
-         */
-      }
-      else {
-        if (sd_char == ';') sd_comment_mode = true;
-        if (!sd_comment_mode) command_queue[cmd_queue_index_w][sd_count++] = sd_char;
-      }
-    }
-  }
-
-#endif // SDSUPPORT
-
-/**
- * Add to the circular command queue the next command from:
- *  - The command-injection queue (injected_commands_P)
- *  - The active serial input (usually USB)
- *  - The SD card file being actively printed
- */
-void get_available_commands() {
-
-  // if any immediate commands remain, don't get other commands yet
-  if (drain_injected_commands_P()) return;
-
-  get_serial_commands();
-
-  #if ENABLED(SDSUPPORT)
-    get_sdcard_commands();
-  #endif
-}
-
-/**
- * Set target_extruder from the T parameter or the active_extruder
- *
- * Returns TRUE if the target is invalid
- */
-bool get_target_extruder_from_command(const uint16_t code) {
-  if (parser.seenval('T')) {
-    const int8_t e = parser.value_byte();
-    if (e >= EXTRUDERS) {
-      SERIAL_ECHO_START();
-      SERIAL_CHAR('M');
-      SERIAL_ECHO(code);
-      SERIAL_ECHOLNPAIR(" " MSG_INVALID_EXTRUDER " ", e);
-      return true;
-    }
-    target_extruder = e;
-  }
-  else
-    target_extruder = active_extruder;
-
-  return false;
-}
-
-#if ENABLED(DUAL_X_CARRIAGE) || ENABLED(DUAL_NOZZLE_DUPLICATION_MODE)
-  bool extruder_duplication_enabled = false; // Used in Dual X mode 2
-#endif
-
-#if ENABLED(DUAL_X_CARRIAGE)
-
-  static DualXMode dual_x_carriage_mode = DEFAULT_DUAL_X_CARRIAGE_MODE;
-
-  static float x_home_pos(const int extruder) {
-    if (extruder == 0)
-      return LOGICAL_X_POSITION(base_home_pos(X_AXIS));
-    else
-      /**
-       * In dual carriage mode the extruder offset provides an override of the
-       * second X-carriage position when homed - otherwise X2_HOME_POS is used.
-       * This allows soft recalibration of the second extruder home position
-       * without firmware reflash (through the M218 command).
-       */
-      return LOGICAL_X_POSITION(hotend_offset[X_AXIS][1] > 0 ? hotend_offset[X_AXIS][1] : X2_HOME_POS);
-  }
-
-  static int x_home_dir(const int extruder) { return extruder ? X2_HOME_DIR : X_HOME_DIR; }
-
-  static float inactive_extruder_x_pos = X2_MAX_POS; // used in mode 0 & 1
-  static bool active_extruder_parked = false;        // used in mode 1 & 2
-  static float raised_parked_position[XYZE];         // used in mode 1
-  static millis_t delayed_move_time = 0;             // used in mode 1
-  static float duplicate_extruder_x_offset = DEFAULT_DUPLICATION_X_OFFSET; // used in mode 2
-  static int16_t duplicate_extruder_temp_offset = 0; // used in mode 2
-
-#endif // DUAL_X_CARRIAGE
-
 #if HAS_WORKSPACE_OFFSET || ENABLED(DUAL_X_CARRIAGE)
 
   /**
@@ -1312,54 +829,6 @@ inline float get_homing_bump_feedrate(const AxisEnum axis) {
   return homing_feedrate(axis) / hbd;
 }
 
-/**
- * Move the planner to the current position from wherever it last moved
- * (or from wherever it has been told it is located).
- */
-inline void line_to_current_position() {
-  planner.buffer_line(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], current_position[E_AXIS], feedrate_mm_s, active_extruder);
-}
-
-/**
- * Move the planner to the position stored in the destination array, which is
- * used by G0/G1/G2/G3/G5 and many other functions to set a destination.
- */
-inline void line_to_destination(const float fr_mm_s) {
-  planner.buffer_line(destination[X_AXIS], destination[Y_AXIS], destination[Z_AXIS], destination[E_AXIS], fr_mm_s, active_extruder);
-}
-inline void line_to_destination() { line_to_destination(feedrate_mm_s); }
-
-inline void set_current_to_destination() { COPY(current_position, destination); }
-inline void set_destination_to_current() { COPY(destination, current_position); }
-
-#if IS_KINEMATIC
-  /**
-   * Calculate delta, start a line, and set current_position to destination
-   */
-  void prepare_uninterpolated_move_to_destination(const float fr_mm_s=0.0) {
-    #if ENABLED(DEBUG_LEVELING_FEATURE)
-      if (DEBUGGING(LEVELING)) DEBUG_POS("prepare_uninterpolated_move_to_destination", destination);
-    #endif
-
-    refresh_cmd_timeout();
-
-    #if UBL_DELTA
-      // ubl segmented line will do z-only moves in single segment
-      ubl.prepare_segmented_line_to(destination, MMS_SCALED(fr_mm_s ? fr_mm_s : feedrate_mm_s));
-    #else
-      if ( current_position[X_AXIS] == destination[X_AXIS]
-        && current_position[Y_AXIS] == destination[Y_AXIS]
-        && current_position[Z_AXIS] == destination[Z_AXIS]
-        && current_position[E_AXIS] == destination[E_AXIS]
-      ) return;
-
-      planner.buffer_line_kinematic(destination, MMS_SCALED(fr_mm_s ? fr_mm_s : feedrate_mm_s), active_extruder);
-    #endif
-
-    set_current_to_destination();
-  }
-#endif // IS_KINEMATIC
-
 /**
  *  Plan a move to (X, Y, Z) and set the current_position
  *  The final current_position may not be the one that was requested
@@ -1506,7 +975,7 @@ static void setup_for_endstop_or_probe_move() {
   saved_feedrate_mm_s = feedrate_mm_s;
   saved_feedrate_percentage = feedrate_percentage;
   feedrate_percentage = 100;
-  refresh_cmd_timeout();
+  gcode.refresh_cmd_timeout();
 }
 
 static void clean_up_after_endstop_or_probe_move() {
@@ -1515,7 +984,7 @@ static void clean_up_after_endstop_or_probe_move() {
   #endif
   feedrate_mm_s = saved_feedrate_mm_s;
   feedrate_percentage = saved_feedrate_percentage;
-  refresh_cmd_timeout();
+  gcode.refresh_cmd_timeout();
 }
 
 #if HAS_BED_PROBE
@@ -2016,7 +1485,7 @@ static void clean_up_after_endstop_or_probe_move() {
     #endif
 
     // Prevent stepper_inactive_time from running out and EXTRUDER_RUNOUT_PREVENT from extruding
-    refresh_cmd_timeout();
+    gcode.refresh_cmd_timeout();
 
     #if ENABLED(PROBE_DOUBLE_TOUCH)
 
@@ -3024,35 +2493,6 @@ static void homeaxis(const AxisEnum axis) {
  * ***************************************************************************
  */
 
-/**
- * Set XYZE destination and feedrate from the current GCode command
- *
- *  - Set destination from included axis codes
- *  - Set to current for missing axis codes
- *  - Set the feedrate, if included
- */
-void gcode_get_destination() {
-  LOOP_XYZE(i) {
-    if (parser.seen(axis_codes[i]))
-      destination[i] = parser.value_axis_units((AxisEnum)i) + (axis_relative_modes[i] || relative_mode ? current_position[i] : 0);
-    else
-      destination[i] = current_position[i];
-  }
-
-  if (parser.linearval('F') > 0.0)
-    feedrate_mm_s = MMM_TO_MMS(parser.value_feedrate());
-
-  #if ENABLED(PRINTCOUNTER)
-    if (!DEBUGGING(DRYRUN))
-      print_job_timer.incFilamentUsed(destination[E_AXIS] - current_position[E_AXIS]);
-  #endif
-
-  // Get ABCDHI mixing factors
-  #if ENABLED(MIXING_EXTRUDER) && ENABLED(DIRECT_MIXING_IN_G1)
-    gcode_get_mix();
-  #endif
-}
-
 #if ENABLED(HOST_KEEPALIVE_FEATURE)
 
   /**
@@ -3091,14 +2531,12 @@ void gcode_get_destination() {
  ***************** GCode Handlers *****************
  **************************************************/
 
-#include "gcode/motion/G0_G1.h"
-
 #if ENABLED(ARC_SUPPORT)
   #include "gcode/motion/G2_G3.h"
 #endif
 
 void dwell(millis_t time) {
-  refresh_cmd_timeout();
+  gcode.refresh_cmd_timeout();
   time += previous_cmd_ms;
   while (PENDING(millis(), time)) idle();
 }
@@ -3250,8 +2688,6 @@ static bool pin_is_protected(const int8_t pin) {
   #include "gcode/stats/M78.h"
 #endif
 
-#include "gcode/temperature/M104.h"
-
 #if HAS_TEMP_HOTEND || HAS_TEMP_BED
 
   void print_heater_state(const float &c, const float &t,
@@ -3288,9 +2724,9 @@ static bool pin_is_protected(const int8_t pin) {
 
   void print_heaterstates() {
     #if HAS_TEMP_HOTEND
-      print_heater_state(thermalManager.degHotend(target_extruder), thermalManager.degTargetHotend(target_extruder)
+      print_heater_state(thermalManager.degHotend(gcode.target_extruder), thermalManager.degTargetHotend(gcode.target_extruder)
         #if ENABLED(SHOW_TEMP_ADC_VALUES)
-          , thermalManager.rawHotendTemp(target_extruder)
+          , thermalManager.rawHotendTemp(gcode.target_extruder)
         #endif
       );
     #endif
@@ -3311,7 +2747,7 @@ static bool pin_is_protected(const int8_t pin) {
       );
     #endif
     SERIAL_PROTOCOLPGM(" @:");
-    SERIAL_PROTOCOL(thermalManager.getHeaterPower(target_extruder));
+    SERIAL_PROTOCOL(thermalManager.getHeaterPower(gcode.target_extruder));
     #if HAS_TEMP_BED
       SERIAL_PROTOCOLPGM(" B@:");
       SERIAL_PROTOCOL(thermalManager.getHeaterPower(-1));
@@ -3357,8 +2793,6 @@ static bool pin_is_protected(const int8_t pin) {
   #include "gcode/control/M410.h"
 #endif
 
-#include "gcode/temperature/M109.h"
-
 #if HAS_TEMP_BED
   #include "gcode/temperature/M190.h"
 #endif
@@ -3404,17 +2838,6 @@ static bool pin_is_protected(const int8_t pin) {
 
 #include "gcode/control/M85.h"
 
-/**
- * Multi-stepper support for M92, M201, M203
- */
-#if ENABLED(DISTINCT_E_FACTORS)
-  #define GET_TARGET_EXTRUDER(CMD) if (get_target_extruder_from_command(CMD)) return
-  #define TARGET_EXTRUDER target_extruder
-#else
-  #define GET_TARGET_EXTRUDER(CMD) NOOP
-  #define TARGET_EXTRUDER 0
-#endif
-
 #include "gcode/config/M92.h"
 
 #if ENABLED(M100_FREE_MEMORY_WATCHER)
@@ -3461,7 +2884,6 @@ void report_current_position() {
   #include "gcode/feature/leds/M150.h"
 #endif
 
-#include "gcode/config/M200.h"
 #include "gcode/config/M201.h"
 
 #if 0 // Not used for Sprinter/grbl gen6
@@ -3484,20 +2906,9 @@ void report_current_position() {
   #include "gcode/calibrate/M666.h"
 #endif
 
-#if ENABLED(FWRETRACT)
-  #include "gcode/feature/fwretract/M207.h"
-  #include "gcode/feature/fwretract/M208.h"
-  #include "gcode/feature/fwretract/M209.h"
-#endif
-
 #include "gcode/control/M211.h"
 
-#if HOTENDS > 1
-  #include "gcode/config/M218.h"
-#endif
-
 #include "gcode/config/M220.h"
-#include "gcode/config/M221.h"
 
 #include "gcode/control/M226.h"
 
@@ -3533,8 +2944,6 @@ void report_current_position() {
   #include "gcode/config/M302.h"
 #endif
 
-#include "gcode/temperature/M303.h"
-
 #if ENABLED(MORGAN_SCARA)
   #include "gcode/scara/M360-M364.h"
 #endif
@@ -3647,80 +3056,6 @@ void quickstop_stepper() {
 
 #include "gcode/control/T.h"
 
-#include "gcode/process_next_command.h"
-
-/**
- * Send a "Resend: nnn" message to the host to
- * indicate that a command needs to be re-sent.
- */
-void FlushSerialRequestResend() {
-  //char command_queue[cmd_queue_index_r][100]="Resend:";
-  MYSERIAL.flush();
-  SERIAL_PROTOCOLPGM(MSG_RESEND);
-  SERIAL_PROTOCOLLN(gcode_LastN + 1);
-  ok_to_send();
-}
-
-/**
- * Send an "ok" message to the host, indicating
- * that a command was successfully processed.
- *
- * If ADVANCED_OK is enabled also include:
- *   N<int>  Line number of the command, if any
- *   P<int>  Planner space remaining
- *   B<int>  Block queue space remaining
- */
-void ok_to_send() {
-  refresh_cmd_timeout();
-  if (!send_ok[cmd_queue_index_r]) return;
-  SERIAL_PROTOCOLPGM(MSG_OK);
-  #if ENABLED(ADVANCED_OK)
-    char* p = command_queue[cmd_queue_index_r];
-    if (*p == 'N') {
-      SERIAL_PROTOCOL(' ');
-      SERIAL_ECHO(*p++);
-      while (NUMERIC_SIGNED(*p))
-        SERIAL_ECHO(*p++);
-    }
-    SERIAL_PROTOCOLPGM(" P"); SERIAL_PROTOCOL(int(BLOCK_BUFFER_SIZE - planner.movesplanned() - 1));
-    SERIAL_PROTOCOLPGM(" B"); SERIAL_PROTOCOL(BUFSIZE - commands_in_queue);
-  #endif
-  SERIAL_EOL();
-}
-
-#if HAS_SOFTWARE_ENDSTOPS
-
-  /**
-   * Constrain the given coordinates to the software endstops.
-   */
-
-  // NOTE: This makes no sense for delta beds other than Z-axis.
-  //       For delta the X/Y would need to be clamped at
-  //       DELTA_PRINTABLE_RADIUS from center of bed, but delta
-  //       now enforces is_position_reachable for X/Y regardless
-  //       of HAS_SOFTWARE_ENDSTOPS, so that enforcement would be
-  //       redundant here.
-
-  void clamp_to_software_endstops(float target[XYZ]) {
-    if (!soft_endstops_enabled) return;
-    #if ENABLED(MIN_SOFTWARE_ENDSTOPS)
-      #if DISABLED(DELTA)
-        NOLESS(target[X_AXIS], soft_endstop_min[X_AXIS]);
-        NOLESS(target[Y_AXIS], soft_endstop_min[Y_AXIS]);
-      #endif
-      NOLESS(target[Z_AXIS], soft_endstop_min[Z_AXIS]);
-    #endif
-    #if ENABLED(MAX_SOFTWARE_ENDSTOPS)
-      #if DISABLED(DELTA)
-        NOMORE(target[X_AXIS], soft_endstop_max[X_AXIS]);
-        NOMORE(target[Y_AXIS], soft_endstop_max[Y_AXIS]);
-      #endif
-      NOMORE(target[Z_AXIS], soft_endstop_max[Z_AXIS]);
-    #endif
-  }
-
-#endif
-
 #if ENABLED(AUTO_BED_LEVELING_BILINEAR)
 
   #if ENABLED(ABL_BILINEAR_SUBDIVISION)
@@ -4090,426 +3425,6 @@ void set_current_from_steppers_for_axis(const AxisEnum axis) {
     current_position[axis] = cartes[axis];
 }
 
-#if ENABLED(MESH_BED_LEVELING)
-
-  /**
-   * Prepare a mesh-leveled linear move in a Cartesian setup,
-   * splitting the move where it crosses mesh borders.
-   */
-  void mesh_line_to_destination(float fr_mm_s, uint8_t x_splits = 0xFF, uint8_t y_splits = 0xFF) {
-    int cx1 = mbl.cell_index_x(RAW_CURRENT_POSITION(X)),
-        cy1 = mbl.cell_index_y(RAW_CURRENT_POSITION(Y)),
-        cx2 = mbl.cell_index_x(RAW_X_POSITION(destination[X_AXIS])),
-        cy2 = mbl.cell_index_y(RAW_Y_POSITION(destination[Y_AXIS]));
-    NOMORE(cx1, GRID_MAX_POINTS_X - 2);
-    NOMORE(cy1, GRID_MAX_POINTS_Y - 2);
-    NOMORE(cx2, GRID_MAX_POINTS_X - 2);
-    NOMORE(cy2, GRID_MAX_POINTS_Y - 2);
-
-    if (cx1 == cx2 && cy1 == cy2) {
-      // Start and end on same mesh square
-      line_to_destination(fr_mm_s);
-      set_current_to_destination();
-      return;
-    }
-
-    #define MBL_SEGMENT_END(A) (current_position[A ##_AXIS] + (destination[A ##_AXIS] - current_position[A ##_AXIS]) * normalized_dist)
-
-    float normalized_dist, end[XYZE];
-
-    // Split at the left/front border of the right/top square
-    const int8_t gcx = max(cx1, cx2), gcy = max(cy1, cy2);
-    if (cx2 != cx1 && TEST(x_splits, gcx)) {
-      COPY(end, destination);
-      destination[X_AXIS] = LOGICAL_X_POSITION(mbl.index_to_xpos[gcx]);
-      normalized_dist = (destination[X_AXIS] - current_position[X_AXIS]) / (end[X_AXIS] - current_position[X_AXIS]);
-      destination[Y_AXIS] = MBL_SEGMENT_END(Y);
-      CBI(x_splits, gcx);
-    }
-    else if (cy2 != cy1 && TEST(y_splits, gcy)) {
-      COPY(end, destination);
-      destination[Y_AXIS] = LOGICAL_Y_POSITION(mbl.index_to_ypos[gcy]);
-      normalized_dist = (destination[Y_AXIS] - current_position[Y_AXIS]) / (end[Y_AXIS] - current_position[Y_AXIS]);
-      destination[X_AXIS] = MBL_SEGMENT_END(X);
-      CBI(y_splits, gcy);
-    }
-    else {
-      // Already split on a border
-      line_to_destination(fr_mm_s);
-      set_current_to_destination();
-      return;
-    }
-
-    destination[Z_AXIS] = MBL_SEGMENT_END(Z);
-    destination[E_AXIS] = MBL_SEGMENT_END(E);
-
-    // Do the split and look for more borders
-    mesh_line_to_destination(fr_mm_s, x_splits, y_splits);
-
-    // Restore destination from stack
-    COPY(destination, end);
-    mesh_line_to_destination(fr_mm_s, x_splits, y_splits);
-  }
-
-#elif ENABLED(AUTO_BED_LEVELING_BILINEAR) && !IS_KINEMATIC
-
-  #define CELL_INDEX(A,V) ((RAW_##A##_POSITION(V) - bilinear_start[A##_AXIS]) * ABL_BG_FACTOR(A##_AXIS))
-
-  /**
-   * Prepare a bilinear-leveled linear move on Cartesian,
-   * splitting the move where it crosses grid borders.
-   */
-  void bilinear_line_to_destination(float fr_mm_s, uint16_t x_splits = 0xFFFF, uint16_t y_splits = 0xFFFF) {
-    int cx1 = CELL_INDEX(X, current_position[X_AXIS]),
-        cy1 = CELL_INDEX(Y, current_position[Y_AXIS]),
-        cx2 = CELL_INDEX(X, destination[X_AXIS]),
-        cy2 = CELL_INDEX(Y, destination[Y_AXIS]);
-    cx1 = constrain(cx1, 0, ABL_BG_POINTS_X - 2);
-    cy1 = constrain(cy1, 0, ABL_BG_POINTS_Y - 2);
-    cx2 = constrain(cx2, 0, ABL_BG_POINTS_X - 2);
-    cy2 = constrain(cy2, 0, ABL_BG_POINTS_Y - 2);
-
-    if (cx1 == cx2 && cy1 == cy2) {
-      // Start and end on same mesh square
-      line_to_destination(fr_mm_s);
-      set_current_to_destination();
-      return;
-    }
-
-    #define LINE_SEGMENT_END(A) (current_position[A ##_AXIS] + (destination[A ##_AXIS] - current_position[A ##_AXIS]) * normalized_dist)
-
-    float normalized_dist, end[XYZE];
-
-    // Split at the left/front border of the right/top square
-    const int8_t gcx = max(cx1, cx2), gcy = max(cy1, cy2);
-    if (cx2 != cx1 && TEST(x_splits, gcx)) {
-      COPY(end, destination);
-      destination[X_AXIS] = LOGICAL_X_POSITION(bilinear_start[X_AXIS] + ABL_BG_SPACING(X_AXIS) * gcx);
-      normalized_dist = (destination[X_AXIS] - current_position[X_AXIS]) / (end[X_AXIS] - current_position[X_AXIS]);
-      destination[Y_AXIS] = LINE_SEGMENT_END(Y);
-      CBI(x_splits, gcx);
-    }
-    else if (cy2 != cy1 && TEST(y_splits, gcy)) {
-      COPY(end, destination);
-      destination[Y_AXIS] = LOGICAL_Y_POSITION(bilinear_start[Y_AXIS] + ABL_BG_SPACING(Y_AXIS) * gcy);
-      normalized_dist = (destination[Y_AXIS] - current_position[Y_AXIS]) / (end[Y_AXIS] - current_position[Y_AXIS]);
-      destination[X_AXIS] = LINE_SEGMENT_END(X);
-      CBI(y_splits, gcy);
-    }
-    else {
-      // Already split on a border
-      line_to_destination(fr_mm_s);
-      set_current_to_destination();
-      return;
-    }
-
-    destination[Z_AXIS] = LINE_SEGMENT_END(Z);
-    destination[E_AXIS] = LINE_SEGMENT_END(E);
-
-    // Do the split and look for more borders
-    bilinear_line_to_destination(fr_mm_s, x_splits, y_splits);
-
-    // Restore destination from stack
-    COPY(destination, end);
-    bilinear_line_to_destination(fr_mm_s, x_splits, y_splits);
-  }
-
-#endif // AUTO_BED_LEVELING_BILINEAR
-
-#if IS_KINEMATIC && !UBL_DELTA
-
-  /**
-   * Prepare a linear move in a DELTA or SCARA setup.
-   *
-   * This calls planner.buffer_line several times, adding
-   * small incremental moves for DELTA or SCARA.
-   */
-  inline bool prepare_kinematic_move_to(float ltarget[XYZE]) {
-
-    // Get the top feedrate of the move in the XY plane
-    const float _feedrate_mm_s = MMS_SCALED(feedrate_mm_s);
-
-    // If the move is only in Z/E don't split up the move
-    if (ltarget[X_AXIS] == current_position[X_AXIS] && ltarget[Y_AXIS] == current_position[Y_AXIS]) {
-      planner.buffer_line_kinematic(ltarget, _feedrate_mm_s, active_extruder);
-      return false;
-    }
-
-    // Fail if attempting move outside printable radius
-    if (!position_is_reachable_xy(ltarget[X_AXIS], ltarget[Y_AXIS])) return true;
-
-    // Get the cartesian distances moved in XYZE
-    const float difference[XYZE] = {
-      ltarget[X_AXIS] - current_position[X_AXIS],
-      ltarget[Y_AXIS] - current_position[Y_AXIS],
-      ltarget[Z_AXIS] - current_position[Z_AXIS],
-      ltarget[E_AXIS] - current_position[E_AXIS]
-    };
-
-    // Get the linear distance in XYZ
-    float cartesian_mm = SQRT(sq(difference[X_AXIS]) + sq(difference[Y_AXIS]) + sq(difference[Z_AXIS]));
-
-    // If the move is very short, check the E move distance
-    if (UNEAR_ZERO(cartesian_mm)) cartesian_mm = FABS(difference[E_AXIS]);
-
-    // No E move either? Game over.
-    if (UNEAR_ZERO(cartesian_mm)) return true;
-
-    // Minimum number of seconds to move the given distance
-    const float seconds = cartesian_mm / _feedrate_mm_s;
-
-    // The number of segments-per-second times the duration
-    // gives the number of segments
-    uint16_t segments = delta_segments_per_second * seconds;
-
-    // For SCARA minimum segment size is 0.25mm
-    #if IS_SCARA
-      NOMORE(segments, cartesian_mm * 4);
-    #endif
-
-    // At least one segment is required
-    NOLESS(segments, 1);
-
-    // The approximate length of each segment
-    const float inv_segments = 1.0 / float(segments),
-                segment_distance[XYZE] = {
-                  difference[X_AXIS] * inv_segments,
-                  difference[Y_AXIS] * inv_segments,
-                  difference[Z_AXIS] * inv_segments,
-                  difference[E_AXIS] * inv_segments
-                };
-
-    // SERIAL_ECHOPAIR("mm=", cartesian_mm);
-    // SERIAL_ECHOPAIR(" seconds=", seconds);
-    // SERIAL_ECHOLNPAIR(" segments=", segments);
-
-    #if IS_SCARA && ENABLED(SCARA_FEEDRATE_SCALING)
-      // SCARA needs to scale the feed rate from mm/s to degrees/s
-      const float inv_segment_length = min(10.0, float(segments) / cartesian_mm), // 1/mm/segs
-                  feed_factor = inv_segment_length * _feedrate_mm_s;
-      float oldA = stepper.get_axis_position_degrees(A_AXIS),
-            oldB = stepper.get_axis_position_degrees(B_AXIS);
-    #endif
-
-    // Get the logical current position as starting point
-    float logical[XYZE];
-    COPY(logical, current_position);
-
-    // Drop one segment so the last move is to the exact target.
-    // If there's only 1 segment, loops will be skipped entirely.
-    --segments;
-
-    // Calculate and execute the segments
-    for (uint16_t s = segments + 1; --s;) {
-      LOOP_XYZE(i) logical[i] += segment_distance[i];
-      #if ENABLED(DELTA)
-        DELTA_LOGICAL_IK(); // Delta can inline its kinematics
-      #else
-        inverse_kinematics(logical);
-      #endif
-
-      ADJUST_DELTA(logical); // Adjust Z if bed leveling is enabled
-
-      #if IS_SCARA && ENABLED(SCARA_FEEDRATE_SCALING)
-        // For SCARA scale the feed rate from mm/s to degrees/s
-        // Use ratio between the length of the move and the larger angle change
-        const float adiff = abs(delta[A_AXIS] - oldA),
-                    bdiff = abs(delta[B_AXIS] - oldB);
-        planner.buffer_line(delta[A_AXIS], delta[B_AXIS], delta[C_AXIS], logical[E_AXIS], max(adiff, bdiff) * feed_factor, active_extruder);
-        oldA = delta[A_AXIS];
-        oldB = delta[B_AXIS];
-      #else
-        planner.buffer_line(delta[A_AXIS], delta[B_AXIS], delta[C_AXIS], logical[E_AXIS], _feedrate_mm_s, active_extruder);
-      #endif
-    }
-
-    // Since segment_distance is only approximate,
-    // the final move must be to the exact destination.
-
-    #if IS_SCARA && ENABLED(SCARA_FEEDRATE_SCALING)
-      // For SCARA scale the feed rate from mm/s to degrees/s
-      // With segments > 1 length is 1 segment, otherwise total length
-      inverse_kinematics(ltarget);
-      ADJUST_DELTA(ltarget);
-      const float adiff = abs(delta[A_AXIS] - oldA),
-                  bdiff = abs(delta[B_AXIS] - oldB);
-      planner.buffer_line(delta[A_AXIS], delta[B_AXIS], delta[C_AXIS], logical[E_AXIS], max(adiff, bdiff) * feed_factor, active_extruder);
-    #else
-      planner.buffer_line_kinematic(ltarget, _feedrate_mm_s, active_extruder);
-    #endif
-
-    return false;
-  }
-
-#else // !IS_KINEMATIC || UBL_DELTA
-
-  /**
-   * Prepare a linear move in a Cartesian setup.
-   * If Mesh Bed Leveling is enabled, perform a mesh move.
-   *
-   * Returns true if the caller didn't update current_position.
-   */
-  inline bool prepare_move_to_destination_cartesian() {
-    #if ENABLED(AUTO_BED_LEVELING_UBL)
-      const float fr_scaled = MMS_SCALED(feedrate_mm_s);
-      if (ubl.state.active) { // direct use of ubl.state.active for speed
-        ubl.line_to_destination_cartesian(fr_scaled, active_extruder);
-        return true;
-      }
-      else
-        line_to_destination(fr_scaled);
-    #else
-      // Do not use feedrate_percentage for E or Z only moves
-      if (current_position[X_AXIS] == destination[X_AXIS] && current_position[Y_AXIS] == destination[Y_AXIS])
-        line_to_destination();
-      else {
-        const float fr_scaled = MMS_SCALED(feedrate_mm_s);
-        #if ENABLED(MESH_BED_LEVELING)
-          if (mbl.active()) { // direct used of mbl.active() for speed
-            mesh_line_to_destination(fr_scaled);
-            return true;
-          }
-          else
-        #elif ENABLED(AUTO_BED_LEVELING_BILINEAR)
-          if (planner.abl_enabled) { // direct use of abl_enabled for speed
-            bilinear_line_to_destination(fr_scaled);
-            return true;
-          }
-          else
-        #endif
-            line_to_destination(fr_scaled);
-      }
-    #endif
-    return false;
-  }
-
-#endif // !IS_KINEMATIC || UBL_DELTA
-
-#if ENABLED(DUAL_X_CARRIAGE)
-
-  /**
-   * Prepare a linear move in a dual X axis setup
-   */
-  inline bool prepare_move_to_destination_dualx() {
-    if (active_extruder_parked) {
-      switch (dual_x_carriage_mode) {
-        case DXC_FULL_CONTROL_MODE:
-          break;
-        case DXC_AUTO_PARK_MODE:
-          if (current_position[E_AXIS] == destination[E_AXIS]) {
-            // This is a travel move (with no extrusion)
-            // Skip it, but keep track of the current position
-            // (so it can be used as the start of the next non-travel move)
-            if (delayed_move_time != 0xFFFFFFFFUL) {
-              set_current_to_destination();
-              NOLESS(raised_parked_position[Z_AXIS], destination[Z_AXIS]);
-              delayed_move_time = millis();
-              return true;
-            }
-          }
-          // unpark extruder: 1) raise, 2) move into starting XY position, 3) lower
-          for (uint8_t i = 0; i < 3; i++)
-            planner.buffer_line(
-              i == 0 ? raised_parked_position[X_AXIS] : current_position[X_AXIS],
-              i == 0 ? raised_parked_position[Y_AXIS] : current_position[Y_AXIS],
-              i == 2 ? current_position[Z_AXIS] : raised_parked_position[Z_AXIS],
-              current_position[E_AXIS],
-              i == 1 ? PLANNER_XY_FEEDRATE() : planner.max_feedrate_mm_s[Z_AXIS],
-              active_extruder
-            );
-          delayed_move_time = 0;
-          active_extruder_parked = false;
-          #if ENABLED(DEBUG_LEVELING_FEATURE)
-            if (DEBUGGING(LEVELING)) SERIAL_ECHOLNPGM("Clear active_extruder_parked");
-          #endif
-          break;
-        case DXC_DUPLICATION_MODE:
-          if (active_extruder == 0) {
-            #if ENABLED(DEBUG_LEVELING_FEATURE)
-              if (DEBUGGING(LEVELING)) {
-                SERIAL_ECHOPAIR("Set planner X", LOGICAL_X_POSITION(inactive_extruder_x_pos));
-                SERIAL_ECHOLNPAIR(" ... Line to X", current_position[X_AXIS] + duplicate_extruder_x_offset);
-              }
-            #endif
-            // move duplicate extruder into correct duplication position.
-            planner.set_position_mm(
-              LOGICAL_X_POSITION(inactive_extruder_x_pos),
-              current_position[Y_AXIS],
-              current_position[Z_AXIS],
-              current_position[E_AXIS]
-            );
-            planner.buffer_line(
-              current_position[X_AXIS] + duplicate_extruder_x_offset,
-              current_position[Y_AXIS], current_position[Z_AXIS], current_position[E_AXIS],
-              planner.max_feedrate_mm_s[X_AXIS], 1
-            );
-            SYNC_PLAN_POSITION_KINEMATIC();
-            stepper.synchronize();
-            extruder_duplication_enabled = true;
-            active_extruder_parked = false;
-            #if ENABLED(DEBUG_LEVELING_FEATURE)
-              if (DEBUGGING(LEVELING)) SERIAL_ECHOLNPGM("Set extruder_duplication_enabled\nClear active_extruder_parked");
-            #endif
-          }
-          else {
-            #if ENABLED(DEBUG_LEVELING_FEATURE)
-              if (DEBUGGING(LEVELING)) SERIAL_ECHOLNPGM("Active extruder not 0");
-            #endif
-          }
-          break;
-      }
-    }
-    return false;
-  }
-
-#endif // DUAL_X_CARRIAGE
-
-/**
- * Prepare a single move and get ready for the next one
- *
- * This may result in several calls to planner.buffer_line to
- * do smaller moves for DELTA, SCARA, mesh moves, etc.
- */
-void prepare_move_to_destination() {
-  clamp_to_software_endstops(destination);
-  refresh_cmd_timeout();
-
-  #if ENABLED(PREVENT_COLD_EXTRUSION)
-
-    if (!DEBUGGING(DRYRUN)) {
-      if (destination[E_AXIS] != current_position[E_AXIS]) {
-        if (thermalManager.tooColdToExtrude(active_extruder)) {
-          current_position[E_AXIS] = destination[E_AXIS]; // Behave as if the move really took place, but ignore E part
-          SERIAL_ECHO_START();
-          SERIAL_ECHOLNPGM(MSG_ERR_COLD_EXTRUDE_STOP);
-        }
-        #if ENABLED(PREVENT_LENGTHY_EXTRUDE)
-          if (destination[E_AXIS] - current_position[E_AXIS] > EXTRUDE_MAXLENGTH) {
-            current_position[E_AXIS] = destination[E_AXIS]; // Behave as if the move really took place, but ignore E part
-            SERIAL_ECHO_START();
-            SERIAL_ECHOLNPGM(MSG_ERR_LONG_EXTRUDE_STOP);
-          }
-        #endif
-      }
-    }
-
-  #endif
-
-  if (
-    #if UBL_DELTA // Also works for CARTESIAN (smaller segments follow mesh more closely)
-      ubl.prepare_segmented_line_to(destination, feedrate_mm_s)
-    #elif IS_KINEMATIC
-      prepare_kinematic_move_to(destination)
-    #elif ENABLED(DUAL_X_CARRIAGE)
-      prepare_move_to_destination_dualx() || prepare_move_to_destination_cartesian()
-    #else
-      prepare_move_to_destination_cartesian()
-    #endif
-  ) return;
-
-  set_current_to_destination();
-}
-
 #if ENABLED(USE_CONTROLLER_FAN)
 
   void controllerFan() {
@@ -4840,7 +3755,7 @@ void manage_inactivity(bool ignore_stepper_queue/*=false*/) {
         }
       #endif // !SWITCHING_EXTRUDER
 
-      previous_cmd_ms = ms; // refresh_cmd_timeout()
+      gcode.refresh_cmd_timeout()
 
       const float olde = current_position[E_AXIS];
       current_position[E_AXIS] += EXTRUDER_RUNOUT_EXTRUDE;
@@ -5076,8 +3991,7 @@ void setup() {
   SERIAL_ECHOPAIR(MSG_FREE_MEMORY, freeMemory());
   SERIAL_ECHOLNPAIR(MSG_PLANNER_BUFFER_BYTES, (int)sizeof(block_t)*BLOCK_BUFFER_SIZE);
 
-  // Send "ok" after commands by default
-  for (int8_t i = 0; i < BUFSIZE; i++) send_ok[i] = true;
+  queue_setup();
 
   // Load data from EEPROM if available (or use defaults)
   // This also updates variables in the planner, elsewhere
@@ -5265,42 +4179,8 @@ void loop() {
     card.checkautostart(false);
   #endif
 
-  if (commands_in_queue) {
+  advance_command_queue();
 
-    #if ENABLED(SDSUPPORT)
-
-      if (card.saving) {
-        char* command = command_queue[cmd_queue_index_r];
-        if (strstr_P(command, PSTR("M29"))) {
-          // M29 closes the file
-          card.closefile();
-          SERIAL_PROTOCOLLNPGM(MSG_FILE_SAVED);
-          ok_to_send();
-        }
-        else {
-          // Write the string from the read buffer to SD
-          card.write_command(command);
-          if (card.logging)
-            process_next_command(); // The card is saving because it's logging
-          else
-            ok_to_send();
-        }
-      }
-      else
-        process_next_command();
-
-    #else
-
-      process_next_command();
-
-    #endif // SDSUPPORT
-
-    // The queue may be reset by a command handler or by code invoked by idle() within a handler
-    if (commands_in_queue) {
-      --commands_in_queue;
-      if (++cmd_queue_index_r >= BUFSIZE) cmd_queue_index_r = 0;
-    }
-  }
   endstops.report_state();
   idle();
 }
diff --git a/Marlin/src/Marlin.h b/Marlin/src/Marlin.h
index fa8160e17c..cd131be933 100644
--- a/Marlin/src/Marlin.h
+++ b/Marlin/src/Marlin.h
@@ -167,9 +167,6 @@ void enable_all_steppers();
 void disable_e_steppers();
 void disable_all_steppers();
 
-void FlushSerialRequestResend();
-void ok_to_send();
-
 void kill(const char*);
 
 void quickstop_stepper();
@@ -182,13 +179,6 @@ extern bool Running;
 inline bool IsRunning() { return  Running; }
 inline bool IsStopped() { return !Running; }
 
-bool enqueue_and_echo_command(const char* cmd, bool say_ok=false); // Add a single command to the end of the buffer. Return false on failure.
-void enqueue_and_echo_commands_P(const char * const cmd);          // Set one or more commands to be prioritized over the next Serial/SD command.
-void clear_command_queue();
-
-extern millis_t previous_cmd_ms;
-inline void refresh_cmd_timeout() { previous_cmd_ms = millis(); }
-
 /**
  * Feedrate scaling and conversion
  */
@@ -196,11 +186,11 @@ extern int16_t feedrate_percentage;
 
 #define MMS_SCALED(MM_S) ((MM_S)*feedrate_percentage*0.01)
 
-extern bool axis_relative_modes[];
 extern bool volumetric_enabled;
 extern int16_t flow_percentage[EXTRUDERS]; // Extrusion factor for each extruder
 extern float filament_size[EXTRUDERS]; // cross-sectional area of filament (in millimeters), typically around 1.75 or 2.85, 0 disables the volumetric calculations for the extruder.
 extern float volumetric_multiplier[EXTRUDERS]; // reciprocal of cross-sectional area of filament (in square millimeters), stored this way to reduce computational burden in planner
+
 extern bool axis_known_position[XYZ];
 extern bool axis_homed[XYZ];
 extern volatile bool wait_for_heatup;
@@ -209,48 +199,6 @@ extern volatile bool wait_for_heatup;
   extern volatile bool wait_for_user;
 #endif
 
-extern float current_position[NUM_AXIS];
-
-// Workspace offsets
-#if HAS_WORKSPACE_OFFSET
-  #if HAS_HOME_OFFSET
-    extern float home_offset[XYZ];
-  #endif
-  #if HAS_POSITION_SHIFT
-    extern float position_shift[XYZ];
-  #endif
-#endif
-
-#if HAS_HOME_OFFSET && HAS_POSITION_SHIFT
-  extern float workspace_offset[XYZ];
-  #define WORKSPACE_OFFSET(AXIS) workspace_offset[AXIS]
-#elif HAS_HOME_OFFSET
-  #define WORKSPACE_OFFSET(AXIS) home_offset[AXIS]
-#elif HAS_POSITION_SHIFT
-  #define WORKSPACE_OFFSET(AXIS) position_shift[AXIS]
-#else
-  #define WORKSPACE_OFFSET(AXIS) 0
-#endif
-
-#define LOGICAL_POSITION(POS, AXIS) ((POS) + WORKSPACE_OFFSET(AXIS))
-#define RAW_POSITION(POS, AXIS)     ((POS) - WORKSPACE_OFFSET(AXIS))
-
-#if HAS_POSITION_SHIFT || DISABLED(DELTA)
-  #define LOGICAL_X_POSITION(POS)   LOGICAL_POSITION(POS, X_AXIS)
-  #define LOGICAL_Y_POSITION(POS)   LOGICAL_POSITION(POS, Y_AXIS)
-  #define RAW_X_POSITION(POS)       RAW_POSITION(POS, X_AXIS)
-  #define RAW_Y_POSITION(POS)       RAW_POSITION(POS, Y_AXIS)
-#else
-  #define LOGICAL_X_POSITION(POS)   (POS)
-  #define LOGICAL_Y_POSITION(POS)   (POS)
-  #define RAW_X_POSITION(POS)       (POS)
-  #define RAW_Y_POSITION(POS)       (POS)
-#endif
-
-#define LOGICAL_Z_POSITION(POS)     LOGICAL_POSITION(POS, Z_AXIS)
-#define RAW_Z_POSITION(POS)         RAW_POSITION(POS, Z_AXIS)
-#define RAW_CURRENT_POSITION(A)     RAW_##A##_POSITION(current_position[A##_AXIS])
-
 // Hotend Offsets
 #if HOTENDS > 1
   extern float hotend_offset[XYZ][HOTENDS];
@@ -259,14 +207,6 @@ extern float current_position[NUM_AXIS];
 // Software Endstops
 extern float soft_endstop_min[XYZ], soft_endstop_max[XYZ];
 
-#if HAS_SOFTWARE_ENDSTOPS
-  extern bool soft_endstops_enabled;
-  void clamp_to_software_endstops(float target[XYZ]);
-#else
-  #define soft_endstops_enabled false
-  #define clamp_to_software_endstops(x) NOOP
-#endif
-
 #if HAS_WORKSPACE_OFFSET || ENABLED(DUAL_X_CARRIAGE)
   void update_software_endstops(const AxisEnum axis);
 #endif
@@ -381,15 +321,15 @@ extern float soft_endstop_min[XYZ], soft_endstop_max[XYZ];
   extern Stopwatch print_job_timer;
 #endif
 
-// Handling multiple extruders pins
-extern uint8_t active_extruder;
-
 #if HAS_TEMP_HOTEND || HAS_TEMP_BED
   void print_heaterstates();
 #endif
 
 #if ENABLED(MIXING_EXTRUDER)
   extern float mixing_factor[MIXING_STEPPERS];
+  #if MIXING_VIRTUAL_TOOLS > 1
+    extern float mixing_virtual_tool_mix[MIXING_VIRTUAL_TOOLS][MIXING_STEPPERS];
+  #endif
 #endif
 
 void calculate_volumetric_multipliers();
@@ -406,62 +346,4 @@ void do_blocking_move_to_xy(const float &x, const float &y, const float &fr_mm_s
   bool axis_unhomed_error(const bool x=true, const bool y=true, const bool z=true);
 #endif
 
-/**
- * position_is_reachable family of functions
- */
-
-#if IS_KINEMATIC // (DELTA or SCARA)
-
-  #if IS_SCARA
-    extern const float L1, L2;
-  #endif
-
-  inline bool position_is_reachable_raw_xy(const float &rx, const float &ry) {
-    #if ENABLED(DELTA)
-      return HYPOT2(rx, ry) <= sq(DELTA_PRINTABLE_RADIUS);
-    #elif IS_SCARA
-      #if MIDDLE_DEAD_ZONE_R > 0
-        const float R2 = HYPOT2(rx - SCARA_OFFSET_X, ry - SCARA_OFFSET_Y);
-        return R2 >= sq(float(MIDDLE_DEAD_ZONE_R)) && R2 <= sq(L1 + L2);
-      #else
-        return HYPOT2(rx - SCARA_OFFSET_X, ry - SCARA_OFFSET_Y) <= sq(L1 + L2);
-      #endif
-    #else // CARTESIAN
-      // To be migrated from MakerArm branch in future
-    #endif
-  }
-
-  inline bool position_is_reachable_by_probe_raw_xy(const float &rx, const float &ry) {
-
-    // Both the nozzle and the probe must be able to reach the point.
-    // This won't work on SCARA since the probe offset rotates with the arm.
-
-    return position_is_reachable_raw_xy(rx, ry)
-        && position_is_reachable_raw_xy(rx - X_PROBE_OFFSET_FROM_EXTRUDER, ry - Y_PROBE_OFFSET_FROM_EXTRUDER);
-  }
-
-#else // CARTESIAN
-
-  inline bool position_is_reachable_raw_xy(const float &rx, const float &ry) {
-      // Add 0.001 margin to deal with float imprecision
-      return WITHIN(rx, X_MIN_POS - 0.001, X_MAX_POS + 0.001)
-          && WITHIN(ry, Y_MIN_POS - 0.001, Y_MAX_POS + 0.001);
-  }
-
-  inline bool position_is_reachable_by_probe_raw_xy(const float &rx, const float &ry) {
-      // Add 0.001 margin to deal with float imprecision
-      return WITHIN(rx, MIN_PROBE_X - 0.001, MAX_PROBE_X + 0.001)
-          && WITHIN(ry, MIN_PROBE_Y - 0.001, MAX_PROBE_Y + 0.001);
-  }
-
-#endif // CARTESIAN
-
-FORCE_INLINE bool position_is_reachable_by_probe_xy(const float &lx, const float &ly) {
-  return position_is_reachable_by_probe_raw_xy(RAW_X_POSITION(lx), RAW_Y_POSITION(ly));
-}
-
-FORCE_INLINE bool position_is_reachable_xy(const float &lx, const float &ly) {
-  return position_is_reachable_raw_xy(RAW_X_POSITION(lx), RAW_Y_POSITION(ly));
-}
-
 #endif // __MARLIN_H__
diff --git a/Marlin/src/core/utility.h b/Marlin/src/core/utility.h
index 45679d2cab..5ad9f11d9b 100644
--- a/Marlin/src/core/utility.h
+++ b/Marlin/src/core/utility.h
@@ -25,6 +25,8 @@
 
 #include "../inc/MarlinConfig.h"
 
+constexpr char axis_codes[XYZE] = { 'X', 'Y', 'Z', 'E' };
+
 void safe_delay(millis_t ms);
 
 #if ENABLED(EEPROM_SETTINGS)
diff --git a/Marlin/src/feature/mbl/mesh_bed_leveling.cpp b/Marlin/src/feature/mbl/mesh_bed_leveling.cpp
index 3e2942789a..35f70967de 100644
--- a/Marlin/src/feature/mbl/mesh_bed_leveling.cpp
+++ b/Marlin/src/feature/mbl/mesh_bed_leveling.cpp
@@ -26,6 +26,8 @@
 
   #include "mesh_bed_leveling.h"
 
+  #include "../../module/motion.h"
+
   mesh_bed_leveling mbl;
 
   uint8_t mesh_bed_leveling::status;
@@ -49,4 +51,63 @@
     ZERO(z_values);
   }
 
+  /**
+   * Prepare a mesh-leveled linear move in a Cartesian setup,
+   * splitting the move where it crosses mesh borders.
+   */
+  void mesh_line_to_destination(const float fr_mm_s, uint8_t x_splits, uint8_t y_splits) {
+    int cx1 = mbl.cell_index_x(RAW_CURRENT_POSITION(X)),
+        cy1 = mbl.cell_index_y(RAW_CURRENT_POSITION(Y)),
+        cx2 = mbl.cell_index_x(RAW_X_POSITION(destination[X_AXIS])),
+        cy2 = mbl.cell_index_y(RAW_Y_POSITION(destination[Y_AXIS]));
+    NOMORE(cx1, GRID_MAX_POINTS_X - 2);
+    NOMORE(cy1, GRID_MAX_POINTS_Y - 2);
+    NOMORE(cx2, GRID_MAX_POINTS_X - 2);
+    NOMORE(cy2, GRID_MAX_POINTS_Y - 2);
+
+    if (cx1 == cx2 && cy1 == cy2) {
+      // Start and end on same mesh square
+      line_to_destination(fr_mm_s);
+      set_current_to_destination();
+      return;
+    }
+
+    #define MBL_SEGMENT_END(A) (current_position[A ##_AXIS] + (destination[A ##_AXIS] - current_position[A ##_AXIS]) * normalized_dist)
+
+    float normalized_dist, end[XYZE];
+
+    // Split at the left/front border of the right/top square
+    const int8_t gcx = max(cx1, cx2), gcy = max(cy1, cy2);
+    if (cx2 != cx1 && TEST(x_splits, gcx)) {
+      COPY(end, destination);
+      destination[X_AXIS] = LOGICAL_X_POSITION(mbl.index_to_xpos[gcx]);
+      normalized_dist = (destination[X_AXIS] - current_position[X_AXIS]) / (end[X_AXIS] - current_position[X_AXIS]);
+      destination[Y_AXIS] = MBL_SEGMENT_END(Y);
+      CBI(x_splits, gcx);
+    }
+    else if (cy2 != cy1 && TEST(y_splits, gcy)) {
+      COPY(end, destination);
+      destination[Y_AXIS] = LOGICAL_Y_POSITION(mbl.index_to_ypos[gcy]);
+      normalized_dist = (destination[Y_AXIS] - current_position[Y_AXIS]) / (end[Y_AXIS] - current_position[Y_AXIS]);
+      destination[X_AXIS] = MBL_SEGMENT_END(X);
+      CBI(y_splits, gcy);
+    }
+    else {
+      // Already split on a border
+      line_to_destination(fr_mm_s);
+      set_current_to_destination();
+      return;
+    }
+
+    destination[Z_AXIS] = MBL_SEGMENT_END(Z);
+    destination[E_AXIS] = MBL_SEGMENT_END(E);
+
+    // Do the split and look for more borders
+    mesh_line_to_destination(fr_mm_s, x_splits, y_splits);
+
+    // Restore destination from stack
+    COPY(destination, end);
+    mesh_line_to_destination(fr_mm_s, x_splits, y_splits);
+  }
+
 #endif // MESH_BED_LEVELING
diff --git a/Marlin/src/feature/mbl/mesh_bed_leveling.h b/Marlin/src/feature/mbl/mesh_bed_leveling.h
index f22d565310..8096a1746c 100644
--- a/Marlin/src/feature/mbl/mesh_bed_leveling.h
+++ b/Marlin/src/feature/mbl/mesh_bed_leveling.h
@@ -120,4 +120,6 @@ public:
 
 extern mesh_bed_leveling mbl;
 
+void mesh_line_to_destination(const float fr_mm_s, uint8_t x_splits=0xFF, uint8_t y_splits=0xFF);
+
 #endif // _MESH_BED_LEVELING_H_
diff --git a/Marlin/src/feature/ubl/G26_Mesh_Validation_Tool.cpp b/Marlin/src/feature/ubl/G26_Mesh_Validation_Tool.cpp
index 23b1b96fb4..576cd73ee8 100644
--- a/Marlin/src/feature/ubl/G26_Mesh_Validation_Tool.cpp
+++ b/Marlin/src/feature/ubl/G26_Mesh_Validation_Tool.cpp
@@ -33,6 +33,7 @@
   #include "../../Marlin.h"
   #include "../../module/planner.h"
   #include "../../module/stepper.h"
+  #include "../../module/motion.h"
   #include "../../module/temperature.h"
   #include "../../lcd/ultralcd.h"
   #include "../../gcode/parser.h"
@@ -129,7 +130,6 @@
 
   // External references
 
-  extern float feedrate_mm_s; // must set before calling prepare_move_to_destination
   extern Planner planner;
   #if ENABLED(ULTRA_LCD)
     extern char lcd_status_message[];
diff --git a/Marlin/src/feature/ubl/ubl.cpp b/Marlin/src/feature/ubl/ubl.cpp
index 7c85db5216..54f39e0f56 100644
--- a/Marlin/src/feature/ubl/ubl.cpp
+++ b/Marlin/src/feature/ubl/ubl.cpp
@@ -30,6 +30,7 @@
   #include "../../module/configuration_store.h"
   #include "../../core/serial.h"
   #include "../../module/planner.h"
+  #include "../../module/motion.h"
 
   #include "math.h"
 
diff --git a/Marlin/src/feature/ubl/ubl_motion.cpp b/Marlin/src/feature/ubl/ubl_motion.cpp
index 8157a35749..b2bcebd774 100644
--- a/Marlin/src/feature/ubl/ubl_motion.cpp
+++ b/Marlin/src/feature/ubl/ubl_motion.cpp
@@ -28,6 +28,7 @@
   #include "../../Marlin.h"
   #include "../../module/planner.h"
   #include "../../module/stepper.h"
+  #include "../../module/motion.h"
 
   #include <math.h>
 
diff --git a/Marlin/src/gcode/calibrate/G29-mbl.h b/Marlin/src/gcode/calibrate/G29-mbl.h
index 1694c21edb..184a212a21 100644
--- a/Marlin/src/gcode/calibrate/G29-mbl.h
+++ b/Marlin/src/gcode/calibrate/G29-mbl.h
@@ -20,6 +20,8 @@
  *
  */
 
+#include "../queue.h"
+
 #include "../../libs/buzzer.h"
 #include "../../lcd/ultralcd.h"
 
diff --git a/Marlin/src/gcode/config/M200.h b/Marlin/src/gcode/config/M200.cpp
similarity index 93%
rename from Marlin/src/gcode/config/M200.h
rename to Marlin/src/gcode/config/M200.cpp
index aa85d65b82..eae17689c5 100644
--- a/Marlin/src/gcode/config/M200.h
+++ b/Marlin/src/gcode/config/M200.cpp
@@ -20,15 +20,18 @@
  *
  */
 
+#include "../gcode.h"
+#include "../../Marlin.h"
+
 /**
  * M200: Set filament diameter and set E axis units to cubic units
  *
  *    T<extruder> - Optional extruder number. Current extruder if omitted.
  *    D<linear> - Diameter of the filament. Use "D0" to switch back to linear units on the E axis.
  */
-void gcode_M200() {
+void GcodeSuite::M200() {
 
-  if (get_target_extruder_from_command(200)) return;
+  if (get_target_extruder_from_command()) return;
 
   if (parser.seen('D')) {
     // setting any extruder filament size disables volumetric on the assumption that
diff --git a/Marlin/src/gcode/config/M201.h b/Marlin/src/gcode/config/M201.h
index 24464507c6..24743f6dfb 100644
--- a/Marlin/src/gcode/config/M201.h
+++ b/Marlin/src/gcode/config/M201.h
@@ -27,7 +27,7 @@
  */
 void gcode_M201() {
 
-  GET_TARGET_EXTRUDER(201);
+  GET_TARGET_EXTRUDER();
 
   LOOP_XYZE(i) {
     if (parser.seen(axis_codes[i])) {
diff --git a/Marlin/src/gcode/config/M203.h b/Marlin/src/gcode/config/M203.h
index 9ef3bd031d..bde9b7a861 100644
--- a/Marlin/src/gcode/config/M203.h
+++ b/Marlin/src/gcode/config/M203.h
@@ -27,7 +27,7 @@
  */
 void gcode_M203() {
 
-  GET_TARGET_EXTRUDER(203);
+  GET_TARGET_EXTRUDER();
 
   LOOP_XYZE(i)
     if (parser.seen(axis_codes[i])) {
diff --git a/Marlin/src/gcode/config/M218.h b/Marlin/src/gcode/config/M218.cpp
similarity index 88%
rename from Marlin/src/gcode/config/M218.h
rename to Marlin/src/gcode/config/M218.cpp
index 2359cc9692..8d12ef5957 100644
--- a/Marlin/src/gcode/config/M218.h
+++ b/Marlin/src/gcode/config/M218.cpp
@@ -20,6 +20,13 @@
  *
  */
 
+#include "../../inc/MarlinConfig.h"
+
+#if HOTENDS > 1
+
+#include "../gcode.h"
+#include "../../module/motion.h"
+
 /**
  * M218 - set hotend offset (in linear units)
  *
@@ -28,8 +35,8 @@
  *   Y<yoffset>
  *   Z<zoffset> - Available with DUAL_X_CARRIAGE and SWITCHING_NOZZLE
  */
-void gcode_M218() {
-  if (get_target_extruder_from_command(218) || target_extruder == 0) return;
+void GcodeSuite::M218() {
+  if (get_target_extruder_from_command() || target_extruder == 0) return;
 
   if (parser.seenval('X')) hotend_offset[X_AXIS][target_extruder] = parser.value_linear_units();
   if (parser.seenval('Y')) hotend_offset[Y_AXIS][target_extruder] = parser.value_linear_units();
@@ -52,3 +59,5 @@ void gcode_M218() {
   }
   SERIAL_EOL();
 }
+
+#endif // HOTENDS > 1
diff --git a/Marlin/src/gcode/config/M221.h b/Marlin/src/gcode/config/M221.cpp
similarity index 88%
rename from Marlin/src/gcode/config/M221.h
rename to Marlin/src/gcode/config/M221.cpp
index 680d0ac173..f62903e86f 100644
--- a/Marlin/src/gcode/config/M221.h
+++ b/Marlin/src/gcode/config/M221.cpp
@@ -20,11 +20,14 @@
  *
  */
 
+#include "../gcode.h"
+#include "../../Marlin.h"
+
 /**
  * M221: Set extrusion percentage (M221 T0 S95)
  */
-void gcode_M221() {
-  if (get_target_extruder_from_command(221)) return;
+void GcodeSuite::M221() {
+  if (get_target_extruder_from_command()) return;
   if (parser.seenval('S'))
     flow_percentage[target_extruder] = parser.value_int();
 }
diff --git a/Marlin/src/gcode/config/M43.h b/Marlin/src/gcode/config/M43.h
index dd4a14be7c..c87607c6d8 100644
--- a/Marlin/src/gcode/config/M43.h
+++ b/Marlin/src/gcode/config/M43.h
@@ -20,6 +20,8 @@
  *
  */
 
+#include "../gcode.h"
+
 #include "../../pins/pinsDebug.h"
 
 inline void toggle_pins() {
@@ -141,7 +143,7 @@ inline void servo_probe_test() {
     }
     if (probe_inverting != deploy_state) SERIAL_PROTOCOLLNPGM("WARNING - INVERTING setting probably backwards");
 
-    refresh_cmd_timeout();
+    gcode.refresh_cmd_timeout();
 
     if (deploy_state != stow_state) {
       SERIAL_PROTOCOLLNPGM("BLTouch clone detected");
@@ -170,7 +172,7 @@ inline void servo_probe_test() {
         safe_delay(2);
 
         if (0 == j % (500 * 1)) // keep cmd_timeout happy
-          refresh_cmd_timeout();
+          gcode.refresh_cmd_timeout();
 
         if (deploy_state != READ(PROBE_TEST_PIN)) { // probe triggered
 
diff --git a/Marlin/src/gcode/config/M92.h b/Marlin/src/gcode/config/M92.h
index 5c8cd33b91..626ce68dd8 100644
--- a/Marlin/src/gcode/config/M92.h
+++ b/Marlin/src/gcode/config/M92.h
@@ -28,7 +28,7 @@
  */
 void gcode_M92() {
 
-  GET_TARGET_EXTRUDER(92);
+  GET_TARGET_EXTRUDER();
 
   LOOP_XYZE(i) {
     if (parser.seen(axis_codes[i])) {
diff --git a/Marlin/src/gcode/control/M999.h b/Marlin/src/gcode/control/M999.h
index b8d60427a2..e8a82e1b14 100644
--- a/Marlin/src/gcode/control/M999.h
+++ b/Marlin/src/gcode/control/M999.h
@@ -20,6 +20,8 @@
  *
  */
 
+#include "../queue.h"
+
 /**
  * M999: Restart after being stopped
  *
@@ -37,5 +39,5 @@ void gcode_M999() {
   if (parser.boolval('S')) return;
 
   // gcode_LastN = Stopped_gcode_LastN;
-  FlushSerialRequestResend();
+  flush_and_request_resend();
 }
diff --git a/Marlin/src/gcode/process_next_command.h b/Marlin/src/gcode/gcode.cpp
similarity index 75%
rename from Marlin/src/gcode/process_next_command.h
rename to Marlin/src/gcode/gcode.cpp
index c4108751e9..367725fe5c 100644
--- a/Marlin/src/gcode/process_next_command.h
+++ b/Marlin/src/gcode/gcode.cpp
@@ -20,11 +20,243 @@
  *
  */
 
+/**
+ * gcode.cpp - Temporary container for all gcode handlers
+ *             Most will migrate to classes, by feature.
+ */
+
+#include "gcode.h"
+GcodeSuite gcode;
+
+#include "parser.h"
+#include "queue.h"
+#include "../module/motion.h"
+
+#if ENABLED(PRINTCOUNTER)
+  #include "../module/printcounter.h"
+#endif
+
+uint8_t GcodeSuite::target_extruder;
+millis_t GcodeSuite::previous_cmd_ms;
+
+bool GcodeSuite::axis_relative_modes[] = AXIS_RELATIVE_MODES;
+
+/**
+ * Set target_extruder from the T parameter or the active_extruder
+ *
+ * Returns TRUE if the target is invalid
+ */
+bool GcodeSuite::get_target_extruder_from_command() {
+  if (parser.seenval('T')) {
+    const int8_t e = parser.value_byte();
+    if (e >= EXTRUDERS) {
+      SERIAL_ECHO_START();
+      SERIAL_CHAR('M');
+      SERIAL_ECHO(parser.codenum);
+      SERIAL_ECHOLNPAIR(" " MSG_INVALID_EXTRUDER " ", e);
+      return true;
+    }
+    target_extruder = e;
+  }
+  else
+    target_extruder = active_extruder;
+
+  return false;
+}
+
+/**
+ * Set XYZE destination and feedrate from the current GCode command
+ *
+ *  - Set destination from included axis codes
+ *  - Set to current for missing axis codes
+ *  - Set the feedrate, if included
+ */
+void GcodeSuite::get_destination_from_command() {
+  LOOP_XYZE(i) {
+    if (parser.seen(axis_codes[i]))
+      destination[i] = parser.value_axis_units((AxisEnum)i) + (axis_relative_modes[i] || relative_mode ? current_position[i] : 0);
+    else
+      destination[i] = current_position[i];
+  }
+
+  if (parser.linearval('F') > 0.0)
+    feedrate_mm_s = MMM_TO_MMS(parser.value_feedrate());
+
+  #if ENABLED(PRINTCOUNTER)
+    if (!DEBUGGING(DRYRUN))
+      print_job_timer.incFilamentUsed(destination[E_AXIS] - current_position[E_AXIS]);
+  #endif
+
+  // Get ABCDHI mixing factors
+  #if ENABLED(MIXING_EXTRUDER) && ENABLED(DIRECT_MIXING_IN_G1)
+    gcode_get_mix();
+  #endif
+}
+
+//
+// Placeholders for non-migrated codes
+//
+extern void gcode_G0_G1(
+  #if IS_SCARA
+    bool fast_move=false
+  #endif
+);
+extern void gcode_G2_G3(bool clockwise);
+extern void gcode_G4();
+extern void gcode_G5();
+extern void gcode_G12();
+extern void gcode_G17();
+extern void gcode_G18();
+extern void gcode_G19();
+extern void gcode_G20();
+extern void gcode_G21();
+extern void gcode_G26();
+extern void gcode_G27();
+extern void gcode_G28(const bool always_home_all);
+extern void gcode_G29();
+extern void gcode_G30();
+extern void gcode_G31();
+extern void gcode_G32();
+extern void gcode_G33();
+extern void gcode_G38(bool is_38_2);
+extern void gcode_G42();
+extern void gcode_G92();
+extern void gcode_M0_M1();
+extern void gcode_M3_M4(bool is_M3);
+extern void gcode_M5();
+extern void gcode_M17();
+extern void gcode_M18_M84();
+extern void gcode_M20();
+extern void gcode_M21();
+extern void gcode_M22();
+extern void gcode_M23();
+extern void gcode_M24();
+extern void gcode_M25();
+extern void gcode_M26();
+extern void gcode_M27();
+extern void gcode_M28();
+extern void gcode_M29();
+extern void gcode_M30();
+extern void gcode_M31();
+extern void gcode_M32();
+extern void gcode_M33();
+extern void gcode_M34();
+extern void gcode_M42();
+extern void gcode_M43();
+extern void gcode_M48();
+extern void gcode_M49();
+extern void gcode_M75();
+extern void gcode_M76();
+extern void gcode_M77();
+extern void gcode_M78();
+extern void gcode_M80();
+extern void gcode_M81();
+extern void gcode_M82();
+extern void gcode_M83();
+extern void gcode_M85();
+extern void gcode_M92();
+extern void gcode_M100();
+extern void gcode_M105();
+extern void gcode_M106();
+extern void gcode_M107();
+extern void gcode_M108();
+extern void gcode_M110();
+extern void gcode_M111();
+extern void gcode_M112();
+extern void gcode_M113();
+extern void gcode_M114();
+extern void gcode_M115();
+extern void gcode_M117();
+extern void gcode_M118();
+extern void gcode_M119();
+extern void gcode_M120();
+extern void gcode_M121();
+extern void gcode_M125();
+extern void gcode_M126();
+extern void gcode_M127();
+extern void gcode_M128();
+extern void gcode_M129();
+extern void gcode_M140();
+extern void gcode_M145();
+extern void gcode_M149();
+extern void gcode_M150();
+extern void gcode_M155();
+extern void gcode_M163();
+extern void gcode_M164();
+extern void gcode_M165();
+extern void gcode_M190();
+extern void gcode_M201();
+extern void gcode_M203();
+extern void gcode_M204();
+extern void gcode_M205();
+extern void gcode_M206();
+extern void gcode_M211();
+extern void gcode_M220();
+extern void gcode_M226();
+extern void gcode_M240();
+extern void gcode_M250();
+extern void gcode_M260();
+extern void gcode_M261();
+extern void gcode_M280();
+extern void gcode_M300();
+extern void gcode_M301();
+extern void gcode_M302();
+extern void gcode_M304();
+extern void gcode_M350();
+extern void gcode_M351();
+extern void gcode_M355();
+extern bool gcode_M360();
+extern bool gcode_M361();
+extern bool gcode_M362();
+extern bool gcode_M363();
+extern bool gcode_M364();
+extern void gcode_M380();
+extern void gcode_M381();
+extern void gcode_M400();
+extern void gcode_M401();
+extern void gcode_M402();
+extern void gcode_M404();
+extern void gcode_M405();
+extern void gcode_M406();
+extern void gcode_M407();
+extern void gcode_M410();
+extern void gcode_M420();
+extern void gcode_M421();
+extern void gcode_M428();
+extern void gcode_M500();
+extern void gcode_M501();
+extern void gcode_M502();
+extern void gcode_M503();
+extern void gcode_M540();
+extern void gcode_M600();
+extern void gcode_M605();
+extern void gcode_M665();
+extern void gcode_M666();
+extern void gcode_M702();
+extern void gcode_M851();
+extern void gcode_M900();
+extern void gcode_M906();
+extern void gcode_M911();
+extern void gcode_M912();
+extern void gcode_M913();
+extern void gcode_M914();
+extern void gcode_M907();
+extern void gcode_M908();
+extern void gcode_M909();
+extern void gcode_M910();
+extern void gcode_M928();
+extern void gcode_M999();
+extern void gcode_T(uint8_t tmp_extruder);
+
+#if ENABLED(M100_FREE_MEMORY_WATCHER)
+  extern void M100_dump_routine(const char * const title, const char *start, const char *end);
+#endif
+
 /**
  * Process a single command and dispatch it to its handler
  * This is called from the main loop()
  */
-void process_next_command() {
+void GcodeSuite::process_next_command() {
   char * const current_command = command_queue[cmd_queue_index_r];
 
   if (DEBUGGING(ECHO)) {
@@ -49,9 +281,9 @@ void process_next_command() {
       case 0:
       case 1:
         #if IS_SCARA
-          gcode_G0_G1(parser.codenum == 0);
+          G0_G1(parser.codenum == 0);
         #else
-          gcode_G0_G1();
+          G0_G1();
         #endif
         break;
 
@@ -76,10 +308,10 @@ void process_next_command() {
 
       #if ENABLED(FWRETRACT)
         case 10: // G10: retract
-          gcode_G10();
+          G10();
           break;
         case 11: // G11: retract_recover
-          gcode_G11();
+          G11();
           break;
       #endif // FWRETRACT
 
@@ -303,9 +535,8 @@ void process_next_command() {
           break;
       #endif
 
-      case 104: // M104: Set hot end temperature
-        gcode_M104();
-        break;
+      case 104: M104(); break;    // M104: Set hot end temperature
+      case 109: M109(); break;    // M109: Wait for hotend temperature to reach target
 
       case 110: // M110: Set Current Line Number
         gcode_M110();
@@ -353,10 +584,6 @@ void process_next_command() {
           break;
       #endif
 
-      case 109: // M109: Wait for hotend temperature to reach target
-        gcode_M109();
-        break;
-
       #if HAS_TEMP_BED
         case 190: // M190: Wait for bed temperature to reach target
           gcode_M190();
@@ -488,7 +715,7 @@ void process_next_command() {
       #endif
 
       case 200: // M200: Set filament diameter, E to cubic units
-        gcode_M200();
+        M200();
         break;
       case 201: // M201: Set max acceleration for print moves (units/s^2)
         gcode_M201();
@@ -528,13 +755,13 @@ void process_next_command() {
 
       #if ENABLED(FWRETRACT)
         case 207: // M207: Set Retract Length, Feedrate, and Z lift
-          gcode_M207();
+          M207();
           break;
         case 208: // M208: Set Recover (unretract) Additional Length and Feedrate
-          gcode_M208();
+          M208();
           break;
         case 209: // M209: Turn Automatic Retract Detection on/off
-          if (MIN_AUTORETRACT <= MAX_AUTORETRACT) gcode_M209();
+          if (MIN_AUTORETRACT <= MAX_AUTORETRACT) M209();
           break;
       #endif // FWRETRACT
 
@@ -544,7 +771,7 @@ void process_next_command() {
 
       #if HOTENDS > 1
         case 218: // M218: Set a tool offset
-          gcode_M218();
+          M218();
           break;
       #endif
 
@@ -553,7 +780,7 @@ void process_next_command() {
         break;
 
       case 221: // M221: Set Flow Percentage
-        gcode_M221();
+        M221();
         break;
 
       case 226: // M226: Wait until a pin reaches a state
@@ -615,7 +842,7 @@ void process_next_command() {
       #endif // PREVENT_COLD_EXTRUSION
 
       case 303: // M303: PID autotune
-        gcode_M303();
+        M303();
         break;
 
       #if ENABLED(MORGAN_SCARA)
@@ -636,6 +863,15 @@ void process_next_command() {
           break;
       #endif // SCARA
 
+      #if ENABLED(EXT_SOLENOID)
+        case 380: // M380: Activate solenoid on active extruder
+          gcode_M380();
+          break;
+        case 381: // M381: Disable all solenoids
+          gcode_M381();
+          break;
+      #endif
+
       case 400: // M400: Finish all moves
         gcode_M400();
         break;
@@ -809,48 +1045,17 @@ void process_next_command() {
       #endif
 
       #if ENABLED(I2C_POSITION_ENCODERS)
-
-        case 860: // M860 Report encoder module position
-          gcode_M860();
-          break;
-
-        case 861: // M861 Report encoder module status
-          gcode_M861();
-          break;
-
-        case 862: // M862 Perform axis test
-          gcode_M862();
-          break;
-
-        case 863: // M863 Calibrate steps/mm
-          gcode_M863();
-          break;
-
-        case 864: // M864 Change module address
-          gcode_M864();
-          break;
-
-        case 865: // M865 Check module firmware version
-          gcode_M865();
-          break;
-
-        case 866: // M866 Report axis error count
-          gcode_M866();
-          break;
-
-        case 867: // M867 Toggle error correction
-          gcode_M867();
-          break;
-
-        case 868: // M868 Set error correction threshold
-          gcode_M868();
-          break;
-
-        case 869: // M869 Report axis error
-          gcode_M869();
-          break;
-
-      #endif // I2C_POSITION_ENCODERS
+        case 860: M860(); break; // M860: Report encoder module position
+        case 861: M861(); break; // M861: Report encoder module status
+        case 862: M862(); break; // M862: Perform axis test
+        case 863: M863(); break; // M863: Calibrate steps/mm
+        case 864: M864(); break; // M864: Change module address
+        case 865: M865(); break; // M865: Check module firmware version
+        case 866: M866(); break; // M866: Report axis error count
+        case 867: M867(); break; // M867: Toggle error correction
+        case 868: M868(); break; // M868: Set error correction threshold
+        case 869: M869(); break; // M869: Report axis error
+      #endif
 
       case 999: // M999: Restart after being Stopped
         gcode_M999();
@@ -868,4 +1073,4 @@ void process_next_command() {
   KEEPALIVE_STATE(NOT_BUSY);
 
   ok_to_send();
-}
\ No newline at end of file
+}
diff --git a/Marlin/src/gcode/gcode.h b/Marlin/src/gcode/gcode.h
index 90e91898fa..2f40b775b9 100644
--- a/Marlin/src/gcode/gcode.h
+++ b/Marlin/src/gcode/gcode.h
@@ -237,8 +237,8 @@
  *
  */
 
-#ifndef GCODE_H
-#define GCODE_H
+#ifndef _GCODE_H_
+#define _GCODE_H_
 
 #include "../inc/MarlinConfig.h"
 #include "parser.h"
@@ -252,6 +252,30 @@ public:
 
   GcodeSuite() {}
 
+  static uint8_t target_extruder;
+
+  static bool axis_relative_modes[];
+
+  static millis_t previous_cmd_ms;
+  FORCE_INLINE static void refresh_cmd_timeout() { previous_cmd_ms = millis(); }
+
+  static bool get_target_extruder_from_command();
+  static void get_destination_from_command();
+  static void process_next_command();
+
+  /**
+   * Multi-stepper support for M92, M201, M203
+   */
+  #if ENABLED(DISTINCT_E_FACTORS)
+    #define GET_TARGET_EXTRUDER() if (gcode.get_target_extruder_from_command()) return
+    #define TARGET_EXTRUDER gcode.target_extruder
+  #else
+    #define GET_TARGET_EXTRUDER() NOOP
+    #define TARGET_EXTRUDER 0
+  #endif
+
+  static FORCE_INLINE void home_all_axes() { G28(true); }
+
 private:
 
   static void G0_G1(
@@ -375,7 +399,7 @@ private:
     static void M48();
   #endif
 
-  #if ENABLED(AUTO_BED_LEVELING_UBL) && ENABLED(UBL_G26_MESH_VALIDATION)
+  #if ENABLED(UBL_G26_MESH_VALIDATION)
     static void M49();
   #endif
 
@@ -679,4 +703,4 @@ private:
 
 extern GcodeSuite gcode;
 
-#endif // GCODE_H
+#endif // _GCODE_H_
diff --git a/Marlin/src/gcode/host/M110.h b/Marlin/src/gcode/host/M110.h
index 711c05dbb6..fb584b370b 100644
--- a/Marlin/src/gcode/host/M110.h
+++ b/Marlin/src/gcode/host/M110.h
@@ -20,6 +20,8 @@
  *
  */
 
+#include "../queue.h"
+
 /**
  * M110: Set Current Line Number
  */
diff --git a/Marlin/src/gcode/lcd/M0_M1.h b/Marlin/src/gcode/lcd/M0_M1.h
index 599dfbd5ef..a47101fbe0 100644
--- a/Marlin/src/gcode/lcd/M0_M1.h
+++ b/Marlin/src/gcode/lcd/M0_M1.h
@@ -20,6 +20,8 @@
  *
  */
 
+#include "../gcode.h"
+
 /**
  * M0: Unconditional stop - Wait for user button press on LCD
  * M1: Conditional stop   - Wait for user button press on LCD
@@ -62,7 +64,7 @@ void gcode_M0_M1() {
   wait_for_user = true;
 
   stepper.synchronize();
-  refresh_cmd_timeout();
+  gcode.refresh_cmd_timeout();
 
   if (ms > 0) {
     ms += previous_cmd_ms;  // wait until this time for a click
diff --git a/Marlin/src/gcode/motion/G0_G1.h b/Marlin/src/gcode/motion/G0_G1.cpp
similarity index 88%
rename from Marlin/src/gcode/motion/G0_G1.h
rename to Marlin/src/gcode/motion/G0_G1.cpp
index 077e664bde..4ec0221e4e 100644
--- a/Marlin/src/gcode/motion/G0_G1.h
+++ b/Marlin/src/gcode/motion/G0_G1.cpp
@@ -20,16 +20,25 @@
  *
  */
 
+#include "../gcode.h"
+#include "../../module/motion.h"
+
+#include "../../Marlin.h"
+
+#include "../../sd/cardreader.h"
+
+extern float destination[XYZE];
+
 /**
  * G0, G1: Coordinated movement of X Y Z E axes
  */
-void gcode_G0_G1(
+void GcodeSuite::G0_G1(
   #if IS_SCARA
-    bool fast_move=false
+    bool fast_move/*=false*/
   #endif
 ) {
   if (IsRunning()) {
-    gcode_get_destination(); // For X Y Z E F
+    get_destination_from_command(); // For X Y Z E F
 
     #if ENABLED(FWRETRACT)
       if (MIN_AUTORETRACT <= MAX_AUTORETRACT) {
diff --git a/Marlin/src/gcode/motion/G2_G3.h b/Marlin/src/gcode/motion/G2_G3.h
index f06e623a1a..90fadd968f 100644
--- a/Marlin/src/gcode/motion/G2_G3.h
+++ b/Marlin/src/gcode/motion/G2_G3.h
@@ -20,6 +20,8 @@
  *
  */
 
+#include "../gcode.h"
+
 #if N_ARC_CORRECTION < 1
   #undef N_ARC_CORRECTION
   #define N_ARC_CORRECTION 1
@@ -209,7 +211,7 @@ void gcode_G2_G3(bool clockwise) {
       relative_mode = true;
     #endif
 
-    gcode_get_destination();
+    gcode.get_destination_from_command();
 
     #if ENABLED(SF_ARC_FIX)
       relative_mode = relative_mode_backup;
@@ -252,7 +254,7 @@ void gcode_G2_G3(bool clockwise) {
 
       // Send the arc to the planner
       plan_arc(destination, arc_offset, clockwise);
-      refresh_cmd_timeout();
+      gcode.refresh_cmd_timeout();
     }
     else {
       // Bad arguments
diff --git a/Marlin/src/gcode/motion/G5.h b/Marlin/src/gcode/motion/G5.h
index 9dc1625089..38c25c8653 100644
--- a/Marlin/src/gcode/motion/G5.h
+++ b/Marlin/src/gcode/motion/G5.h
@@ -21,6 +21,7 @@
  */
 
 #include "../../module/planner_bezier.h"
+#include "../../gcode/gcode.h"
 
 void plan_cubic_move(const float offset[4]) {
   cubic_b_spline(current_position, destination, offset, MMS_SCALED(feedrate_mm_s), active_extruder);
@@ -52,7 +53,7 @@ void gcode_G5() {
       }
     #endif
 
-    gcode_get_destination();
+    gcode.get_destination_from_command();
 
     const float offset[] = {
       parser.linearval('I'),
diff --git a/Marlin/src/gcode/parser.h b/Marlin/src/gcode/parser.h
index 2a9a81c6db..9743a7bb99 100644
--- a/Marlin/src/gcode/parser.h
+++ b/Marlin/src/gcode/parser.h
@@ -242,7 +242,7 @@ public:
       FORCE_INLINE static char temp_units_code() {
         return input_temp_units == TEMPUNIT_K ? 'K' : input_temp_units == TEMPUNIT_F ? 'F' : 'C';
       }
-      FORCE_INLINE static char* temp_units_name() {
+      FORCE_INLINE static const char* temp_units_name() {
         return input_temp_units == TEMPUNIT_K ? PSTR("Kelvin") : input_temp_units == TEMPUNIT_F ? PSTR("Fahrenheit") : PSTR("Celsius");
       }
       inline static float to_temp_units(const float &f) {
diff --git a/Marlin/src/gcode/probe/G38.h b/Marlin/src/gcode/probe/G38.h
index ec9ad806a7..976569d8f1 100644
--- a/Marlin/src/gcode/probe/G38.h
+++ b/Marlin/src/gcode/probe/G38.h
@@ -20,6 +20,8 @@
  *
  */
 
+#include "../gcode.h"
+
 static bool G38_run_probe() {
 
   bool G38_pass_fail = false;
@@ -88,7 +90,7 @@ static bool G38_run_probe() {
  */
 void gcode_G38(bool is_38_2) {
   // Get X Y Z E F
-  gcode_get_destination();
+  gcode.get_destination_from_command();
 
   setup_for_endstop_or_probe_move();
 
diff --git a/Marlin/src/gcode/queue.cpp b/Marlin/src/gcode/queue.cpp
new file mode 100644
index 0000000000..6af72c949a
--- /dev/null
+++ b/Marlin/src/gcode/queue.cpp
@@ -0,0 +1,473 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+/**
+ * queue.cpp - The G-code command queue
+ */
+
+#include "queue.h"
+#include "gcode.h"
+
+#include "../lcd/ultralcd.h"
+#include "../sd/cardreader.h"
+#include "../module/planner.h"
+#include "../Marlin.h"
+
+/**
+ * GCode line number handling. Hosts may opt to include line numbers when
+ * sending commands to Marlin, and lines will be checked for sequentiality.
+ * M110 N<int> sets the current line number.
+ */
+long gcode_N, gcode_LastN, Stopped_gcode_LastN = 0;
+
+/**
+ * GCode Command Queue
+ * A simple ring buffer of BUFSIZE command strings.
+ *
+ * Commands are copied into this buffer by the command injectors
+ * (immediate, serial, sd card) and they are processed sequentially by
+ * the main loop. The gcode.process_next_command method parses the next
+ * command and hands off execution to individual handler functions.
+ */
+uint8_t commands_in_queue = 0, // Count of commands in the queue
+        cmd_queue_index_r = 0, // Ring buffer read position
+        cmd_queue_index_w = 0; // Ring buffer write position
+
+char command_queue[BUFSIZE][MAX_CMD_SIZE];
+
+/**
+ * Serial command injection
+ */
+
+// Number of characters read in the current line of serial input
+static int serial_count = 0;
+
+bool send_ok[BUFSIZE];
+
+/**
+ * Next Injected Command pointer. NULL if no commands are being injected.
+ * Used by Marlin internally to ensure that commands initiated from within
+ * are enqueued ahead of any pending serial or sd card commands.
+ */
+static const char *injected_commands_P = NULL;
+
+void queue_setup() {
+  // Send "ok" after commands by default
+  for (uint8_t i = 0; i < COUNT(send_ok); i++) send_ok[i] = true;
+}
+
+/**
+ * Clear the Marlin command queue
+ */
+void clear_command_queue() {
+  cmd_queue_index_r = cmd_queue_index_w;
+  commands_in_queue = 0;
+}
+
+/**
+ * Once a new command is in the ring buffer, call this to commit it
+ */
+inline void _commit_command(bool say_ok) {
+  send_ok[cmd_queue_index_w] = say_ok;
+  if (++cmd_queue_index_w >= BUFSIZE) cmd_queue_index_w = 0;
+  commands_in_queue++;
+}
+
+/**
+ * Copy a command from RAM into the main command buffer.
+ * Return true if the command was successfully added.
+ * Return false for a full buffer, or if the 'command' is a comment.
+ */
+inline bool _enqueuecommand(const char* cmd, bool say_ok/*=false*/) {
+  if (*cmd == ';' || commands_in_queue >= BUFSIZE) return false;
+  strcpy(command_queue[cmd_queue_index_w], cmd);
+  _commit_command(say_ok);
+  return true;
+}
+
+/**
+ * Enqueue with Serial Echo
+ */
+bool enqueue_and_echo_command(const char* cmd, bool say_ok/*=false*/) {
+  if (_enqueuecommand(cmd, say_ok)) {
+    SERIAL_ECHO_START();
+    SERIAL_ECHOPAIR(MSG_ENQUEUEING, cmd);
+    SERIAL_CHAR('"');
+    SERIAL_EOL();
+    return true;
+  }
+  return false;
+}
+
+/**
+ * Inject the next "immediate" command, when possible, onto the front of the queue.
+ * Return true if any immediate commands remain to inject.
+ */
+static bool drain_injected_commands_P() {
+  if (injected_commands_P != NULL) {
+    size_t i = 0;
+    char c, cmd[30];
+    strncpy_P(cmd, injected_commands_P, sizeof(cmd) - 1);
+    cmd[sizeof(cmd) - 1] = '\0';
+    while ((c = cmd[i]) && c != '\n') i++; // find the end of this gcode command
+    cmd[i] = '\0';
+    if (enqueue_and_echo_command(cmd))     // success?
+      injected_commands_P = c ? injected_commands_P + i + 1 : NULL; // next command or done
+  }
+  return (injected_commands_P != NULL);    // return whether any more remain
+}
+
+/**
+ * Record one or many commands to run from program memory.
+ * Aborts the current queue, if any.
+ * Note: drain_injected_commands_P() must be called repeatedly to drain the commands afterwards
+ */
+void enqueue_and_echo_commands_P(const char * const pgcode) {
+  injected_commands_P = pgcode;
+  drain_injected_commands_P(); // first command executed asap (when possible)
+}
+
+/**
+ * Send an "ok" message to the host, indicating
+ * that a command was successfully processed.
+ *
+ * If ADVANCED_OK is enabled also include:
+ *   N<int>  Line number of the command, if any
+ *   P<int>  Planner space remaining
+ *   B<int>  Block queue space remaining
+ */
+void ok_to_send() {
+  gcode.refresh_cmd_timeout();
+  if (!send_ok[cmd_queue_index_r]) return;
+  SERIAL_PROTOCOLPGM(MSG_OK);
+  #if ENABLED(ADVANCED_OK)
+    char* p = command_queue[cmd_queue_index_r];
+    if (*p == 'N') {
+      SERIAL_PROTOCOL(' ');
+      SERIAL_ECHO(*p++);
+      while (NUMERIC_SIGNED(*p))
+        SERIAL_ECHO(*p++);
+    }
+    SERIAL_PROTOCOLPGM(" P"); SERIAL_PROTOCOL(int(BLOCK_BUFFER_SIZE - planner.movesplanned() - 1));
+    SERIAL_PROTOCOLPGM(" B"); SERIAL_PROTOCOL(BUFSIZE - commands_in_queue);
+  #endif
+  SERIAL_EOL();
+}
+
+/**
+ * Send a "Resend: nnn" message to the host to
+ * indicate that a command needs to be re-sent.
+ */
+void flush_and_request_resend() {
+  //char command_queue[cmd_queue_index_r][100]="Resend:";
+  MYSERIAL.flush();
+  SERIAL_PROTOCOLPGM(MSG_RESEND);
+  SERIAL_PROTOCOLLN(gcode_LastN + 1);
+  ok_to_send();
+}
+
+void gcode_line_error(const char* err, bool doFlush = true) {
+  SERIAL_ERROR_START();
+  serialprintPGM(err);
+  SERIAL_ERRORLN(gcode_LastN);
+  //Serial.println(gcode_N);
+  if (doFlush) flush_and_request_resend();
+  serial_count = 0;
+}
+
+/**
+ * Get all commands waiting on the serial port and queue them.
+ * Exit when the buffer is full or when no more characters are
+ * left on the serial port.
+ */
+inline void get_serial_commands() {
+  static char serial_line_buffer[MAX_CMD_SIZE];
+  static bool serial_comment_mode = false;
+
+  // If the command buffer is empty for too long,
+  // send "wait" to indicate Marlin is still waiting.
+  #if defined(NO_TIMEOUTS) && NO_TIMEOUTS > 0
+    static millis_t last_command_time = 0;
+    const millis_t ms = millis();
+    if (commands_in_queue == 0 && !MYSERIAL.available() && ELAPSED(ms, last_command_time + NO_TIMEOUTS)) {
+      SERIAL_ECHOLNPGM(MSG_WAIT);
+      last_command_time = ms;
+    }
+  #endif
+
+  /**
+   * Loop while serial characters are incoming and the queue is not full
+   */
+  while (commands_in_queue < BUFSIZE && MYSERIAL.available() > 0) {
+
+    char serial_char = MYSERIAL.read();
+
+    /**
+     * If the character ends the line
+     */
+    if (serial_char == '\n' || serial_char == '\r') {
+
+      serial_comment_mode = false; // end of line == end of comment
+
+      if (!serial_count) continue; // skip empty lines
+
+      serial_line_buffer[serial_count] = 0; // terminate string
+      serial_count = 0; //reset buffer
+
+      char* command = serial_line_buffer;
+
+      while (*command == ' ') command++; // skip any leading spaces
+      char *npos = (*command == 'N') ? command : NULL, // Require the N parameter to start the line
+           *apos = strchr(command, '*');
+
+      if (npos) {
+
+        bool M110 = strstr_P(command, PSTR("M110")) != NULL;
+
+        if (M110) {
+          char* n2pos = strchr(command + 4, 'N');
+          if (n2pos) npos = n2pos;
+        }
+
+        gcode_N = strtol(npos + 1, NULL, 10);
+
+        if (gcode_N != gcode_LastN + 1 && !M110) {
+          gcode_line_error(PSTR(MSG_ERR_LINE_NO));
+          return;
+        }
+
+        if (apos) {
+          byte checksum = 0, count = 0;
+          while (command[count] != '*') checksum ^= command[count++];
+
+          if (strtol(apos + 1, NULL, 10) != checksum) {
+            gcode_line_error(PSTR(MSG_ERR_CHECKSUM_MISMATCH));
+            return;
+          }
+          // if no errors, continue parsing
+        }
+        else {
+          gcode_line_error(PSTR(MSG_ERR_NO_CHECKSUM));
+          return;
+        }
+
+        gcode_LastN = gcode_N;
+        // if no errors, continue parsing
+      }
+      else if (apos) { // No '*' without 'N'
+        gcode_line_error(PSTR(MSG_ERR_NO_LINENUMBER_WITH_CHECKSUM), false);
+        return;
+      }
+
+      // Movement commands alert when stopped
+      if (IsStopped()) {
+        char* gpos = strchr(command, 'G');
+        if (gpos) {
+          const int codenum = strtol(gpos + 1, NULL, 10);
+          switch (codenum) {
+            case 0:
+            case 1:
+            case 2:
+            case 3:
+              SERIAL_ERRORLNPGM(MSG_ERR_STOPPED);
+              LCD_MESSAGEPGM(MSG_STOPPED);
+              break;
+          }
+        }
+      }
+
+      #if DISABLED(EMERGENCY_PARSER)
+        // If command was e-stop process now
+        if (strcmp(command, "M108") == 0) {
+          wait_for_heatup = false;
+          #if ENABLED(ULTIPANEL)
+            wait_for_user = false;
+          #endif
+        }
+        if (strcmp(command, "M112") == 0) kill(PSTR(MSG_KILLED));
+        if (strcmp(command, "M410") == 0) { quickstop_stepper(); }
+      #endif
+
+      #if defined(NO_TIMEOUTS) && NO_TIMEOUTS > 0
+        last_command_time = ms;
+      #endif
+
+      // Add the command to the queue
+      _enqueuecommand(serial_line_buffer, true);
+    }
+    else if (serial_count >= MAX_CMD_SIZE - 1) {
+      // Keep fetching, but ignore normal characters beyond the max length
+      // The command will be injected when EOL is reached
+    }
+    else if (serial_char == '\\') {  // Handle escapes
+      if (MYSERIAL.available() > 0) {
+        // if we have one more character, copy it over
+        serial_char = MYSERIAL.read();
+        if (!serial_comment_mode) serial_line_buffer[serial_count++] = serial_char;
+      }
+      // otherwise do nothing
+    }
+    else { // it's not a newline, carriage return or escape char
+      if (serial_char == ';') serial_comment_mode = true;
+      if (!serial_comment_mode) serial_line_buffer[serial_count++] = serial_char;
+    }
+
+  } // queue has space, serial has data
+}
+
+#if ENABLED(SDSUPPORT)
+
+  /**
+   * Get commands from the SD Card until the command buffer is full
+   * or until the end of the file is reached. The special character '#'
+   * can also interrupt buffering.
+   */
+  inline void get_sdcard_commands() {
+    static bool stop_buffering = false,
+                sd_comment_mode = false;
+
+    if (!IS_SD_PRINTING) return;
+
+    /**
+     * '#' stops reading from SD to the buffer prematurely, so procedural
+     * macro calls are possible. If it occurs, stop_buffering is triggered
+     * and the buffer is run dry; this character _can_ occur in serial com
+     * due to checksums, however, no checksums are used in SD printing.
+     */
+
+    if (commands_in_queue == 0) stop_buffering = false;
+
+    uint16_t sd_count = 0;
+    bool card_eof = card.eof();
+    while (commands_in_queue < BUFSIZE && !card_eof && !stop_buffering) {
+      const int16_t n = card.get();
+      char sd_char = (char)n;
+      card_eof = card.eof();
+      if (card_eof || n == -1
+          || sd_char == '\n' || sd_char == '\r'
+          || ((sd_char == '#' || sd_char == ':') && !sd_comment_mode)
+      ) {
+        if (card_eof) {
+          SERIAL_PROTOCOLLNPGM(MSG_FILE_PRINTED);
+          card.printingHasFinished();
+          #if ENABLED(PRINTER_EVENT_LEDS)
+            LCD_MESSAGEPGM(MSG_INFO_COMPLETED_PRINTS);
+            set_led_color(0, 255, 0); // Green
+            #if HAS_RESUME_CONTINUE
+              enqueue_and_echo_commands_P(PSTR("M0")); // end of the queue!
+            #else
+              safe_delay(1000);
+            #endif
+            set_led_color(0, 0, 0);   // OFF
+          #endif
+          card.checkautostart(true);
+        }
+        else if (n == -1) {
+          SERIAL_ERROR_START();
+          SERIAL_ECHOLNPGM(MSG_SD_ERR_READ);
+        }
+        if (sd_char == '#') stop_buffering = true;
+
+        sd_comment_mode = false; // for new command
+
+        if (!sd_count) continue; // skip empty lines (and comment lines)
+
+        command_queue[cmd_queue_index_w][sd_count] = '\0'; // terminate string
+        sd_count = 0; // clear sd line buffer
+
+        _commit_command(false);
+      }
+      else if (sd_count >= MAX_CMD_SIZE - 1) {
+        /**
+         * Keep fetching, but ignore normal characters beyond the max length
+         * The command will be injected when EOL is reached
+         */
+      }
+      else {
+        if (sd_char == ';') sd_comment_mode = true;
+        if (!sd_comment_mode) command_queue[cmd_queue_index_w][sd_count++] = sd_char;
+      }
+    }
+  }
+
+#endif // SDSUPPORT
+
+/**
+ * Add to the circular command queue the next command from:
+ *  - The command-injection queue (injected_commands_P)
+ *  - The active serial input (usually USB)
+ *  - The SD card file being actively printed
+ */
+void get_available_commands() {
+
+  // if any immediate commands remain, don't get other commands yet
+  if (drain_injected_commands_P()) return;
+
+  get_serial_commands();
+
+  #if ENABLED(SDSUPPORT)
+    get_sdcard_commands();
+  #endif
+}
+
+/**
+ * Get the next command in the queue, optionally log it to SD, then dispatch it
+ */
+void advance_command_queue() {
+
+  if (!commands_in_queue) return;
+
+  #if ENABLED(SDSUPPORT)
+
+    if (card.saving) {
+      char* command = command_queue[cmd_queue_index_r];
+      if (strstr_P(command, PSTR("M29"))) {
+        // M29 closes the file
+        card.closefile();
+        SERIAL_PROTOCOLLNPGM(MSG_FILE_SAVED);
+        ok_to_send();
+      }
+      else {
+        // Write the string from the read buffer to SD
+        card.write_command(command);
+        if (card.logging)
+          gcode.process_next_command(); // The card is saving because it's logging
+        else
+          ok_to_send();
+      }
+    }
+    else
+      gcode.process_next_command();
+
+  #else
+
+    gcode.process_next_command();
+
+  #endif // SDSUPPORT
+
+  // The queue may be reset by a command handler or by code invoked by idle() within a handler
+  if (commands_in_queue) {
+    --commands_in_queue;
+    if (++cmd_queue_index_r >= BUFSIZE) cmd_queue_index_r = 0;
+  }
+
+}
diff --git a/Marlin/src/gcode/queue.h b/Marlin/src/gcode/queue.h
new file mode 100644
index 0000000000..65086739b8
--- /dev/null
+++ b/Marlin/src/gcode/queue.h
@@ -0,0 +1,106 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+/**
+ * queue.h - The G-code command queue, which holds commands before they
+ *           go to the parser and dispatcher.
+ */
+
+#ifndef GCODE_QUEUE_H
+#define GCODE_QUEUE_H
+
+#include "../inc/MarlinConfig.h"
+
+/**
+ * GCode line number handling. Hosts may include line numbers when sending
+ * commands to Marlin, and lines will be checked for sequentiality.
+ * M110 N<int> sets the current line number.
+ */
+extern long gcode_LastN, Stopped_gcode_LastN;
+
+/**
+ * GCode Command Queue
+ * A simple ring buffer of BUFSIZE command strings.
+ *
+ * Commands are copied into this buffer by the command injectors
+ * (immediate, serial, sd card) and they are processed sequentially by
+ * the main loop. The gcode.process_next_command method parses the next
+ * command and hands off execution to individual handler functions.
+ */
+extern uint8_t commands_in_queue, // Count of commands in the queue
+               cmd_queue_index_r; // Ring buffer read position
+
+extern char command_queue[BUFSIZE][MAX_CMD_SIZE];
+
+/**
+ * Initialization of queue for setup()
+ */
+void queue_setup();
+
+/**
+ * Clear the Marlin command queue
+ */
+void clear_command_queue();
+
+/**
+ * Clear the serial line and request a resend of
+ * the next expected line number.
+ */
+void flush_and_request_resend();
+
+/**
+ * Send an "ok" message to the host, indicating
+ * that a command was successfully processed.
+ *
+ * If ADVANCED_OK is enabled also include:
+ *   N<int>  Line number of the command, if any
+ *   P<int>  Planner space remaining
+ *   B<int>  Block queue space remaining
+ */
+void ok_to_send();
+
+/**
+ * Record one or many commands to run from program memory.
+ * Aborts the current queue, if any.
+ * Note: drain_injected_commands_P() must be called repeatedly to drain the commands afterwards
+ */
+void enqueue_and_echo_commands_P(const char * const pgcode);
+
+/**
+ * Enqueue with Serial Echo
+ */
+bool enqueue_and_echo_command(const char* cmd, bool say_ok=false);
+
+/**
+ * Add to the circular command queue the next command from:
+ *  - The command-injection queue (injected_commands_P)
+ *  - The active serial input (usually USB)
+ *  - The SD card file being actively printed
+ */
+void get_available_commands();
+
+/**
+ * Get the next command in the queue, optionally log it to SD, then dispatch it
+ */
+void advance_command_queue();
+
+#endif // GCODE_QUEUE_H
diff --git a/Marlin/src/gcode/temperature/M104.h b/Marlin/src/gcode/temperature/M104.cpp
similarity index 73%
rename from Marlin/src/gcode/temperature/M104.h
rename to Marlin/src/gcode/temperature/M104.cpp
index 1d5facb28a..025a6f0324 100644
--- a/Marlin/src/gcode/temperature/M104.h
+++ b/Marlin/src/gcode/temperature/M104.cpp
@@ -20,23 +20,35 @@
  *
  */
 
+#include "../gcode.h"
+#include "../../module/temperature.h"
+#include "../../module/motion.h"
+#include "../../module/planner.h"
+#include "../../lcd/ultralcd.h"
+
+#if ENABLED(PRINTJOB_TIMER_AUTOSTART)
+  #include "../../module/printcounter.h"
+#endif
+
 /**
  * M104: Set hot end temperature
  */
-void gcode_M104() {
-  if (get_target_extruder_from_command(104)) return;
+void GcodeSuite::M104() {
+  if (get_target_extruder_from_command()) return;
   if (DEBUGGING(DRYRUN)) return;
 
+  const uint8_t e = target_extruder;
+
   #if ENABLED(SINGLENOZZLE)
-    if (target_extruder != active_extruder) return;
+    if (e != active_extruder) return;
   #endif
 
   if (parser.seenval('S')) {
     const int16_t temp = parser.value_celsius();
-    thermalManager.setTargetHotend(temp, target_extruder);
+    thermalManager.setTargetHotend(temp, e);
 
     #if ENABLED(DUAL_X_CARRIAGE)
-      if (dual_x_carriage_mode == DXC_DUPLICATION_MODE && target_extruder == 0)
+      if (dual_x_carriage_mode == DXC_DUPLICATION_MODE && e == 0)
         thermalManager.setTargetHotend(temp ? temp + duplicate_extruder_temp_offset : 0, 1);
     #endif
 
@@ -53,8 +65,8 @@ void gcode_M104() {
       }
     #endif
 
-    if (parser.value_celsius() > thermalManager.degHotend(target_extruder))
-      lcd_status_printf_P(0, PSTR("E%i %s"), target_extruder + 1, MSG_HEATING);
+    if (parser.value_celsius() > thermalManager.degHotend(e))
+      lcd_status_printf_P(0, PSTR("E%i %s"), e + 1, MSG_HEATING);
   }
 
   #if ENABLED(AUTOTEMP)
diff --git a/Marlin/src/gcode/temperature/M105.h b/Marlin/src/gcode/temperature/M105.h
index 351ff25c9d..b5c7dc99a7 100644
--- a/Marlin/src/gcode/temperature/M105.h
+++ b/Marlin/src/gcode/temperature/M105.h
@@ -24,7 +24,7 @@
  * M105: Read hot end and bed temperature
  */
 void gcode_M105() {
-  if (get_target_extruder_from_command(105)) return;
+  if (gcode.get_target_extruder_from_command()) return;
 
   #if HAS_TEMP_HOTEND || HAS_TEMP_BED
     SERIAL_PROTOCOLPGM(MSG_OK);
diff --git a/Marlin/src/gcode/temperature/M109.h b/Marlin/src/gcode/temperature/M109.cpp
similarity index 94%
rename from Marlin/src/gcode/temperature/M109.h
rename to Marlin/src/gcode/temperature/M109.cpp
index b51cf30498..a3740d47a7 100644
--- a/Marlin/src/gcode/temperature/M109.h
+++ b/Marlin/src/gcode/temperature/M109.cpp
@@ -20,6 +20,20 @@
  *
  */
 
+#include "../gcode.h"
+#include "../../module/temperature.h"
+#include "../../module/planner.h"
+#include "../../lcd/ultralcd.h"
+#include "../../Marlin.h"
+
+#if ENABLED(PRINTJOB_TIMER_AUTOSTART)
+  #include "../../module/printcounter.h"
+#endif
+
+#if ENABLED(DUAL_X_CARRIAGE)
+  #include "../../module/motion.h"
+#endif
+
 /**
  * M109: Sxxx Wait for extruder(s) to reach temperature. Waits only when heating.
  *       Rxxx Wait for extruder(s) to reach temperature. Waits when heating and cooling.
@@ -32,9 +46,9 @@
   #define MIN_COOLING_SLOPE_TIME 60
 #endif
 
-void gcode_M109() {
+void GcodeSuite::M109() {
 
-  if (get_target_extruder_from_command(109)) return;
+  if (get_target_extruder_from_command()) return;
   if (DEBUGGING(DRYRUN)) return;
 
   #if ENABLED(SINGLENOZZLE)
diff --git a/Marlin/src/gcode/temperature/M190.h b/Marlin/src/gcode/temperature/M190.h
index 7eab1031f3..f4aebb91fd 100644
--- a/Marlin/src/gcode/temperature/M190.h
+++ b/Marlin/src/gcode/temperature/M190.h
@@ -20,6 +20,8 @@
  *
  */
 
+#include "../gcode.h"
+
 #ifndef MIN_COOLING_SLOPE_DEG_BED
   #define MIN_COOLING_SLOPE_DEG_BED 1.50
 #endif
@@ -63,7 +65,7 @@ void gcode_M190() {
     KEEPALIVE_STATE(NOT_BUSY);
   #endif
 
-  target_extruder = active_extruder; // for print_heaterstates
+  gcode.target_extruder = active_extruder; // for print_heaterstates
 
   #if ENABLED(PRINTER_EVENT_LEDS)
     const float start_temp = thermalManager.degBed();
@@ -95,7 +97,7 @@ void gcode_M190() {
     }
 
     idle();
-    refresh_cmd_timeout(); // to prevent stepper_inactive_time from running out
+    gcode.refresh_cmd_timeout(); // to prevent stepper_inactive_time from running out
 
     const float temp = thermalManager.degBed();
 
diff --git a/Marlin/src/gcode/temperature/M303.h b/Marlin/src/gcode/temperature/M303.cpp
similarity index 95%
rename from Marlin/src/gcode/temperature/M303.h
rename to Marlin/src/gcode/temperature/M303.cpp
index 6dec8dc174..c1c74aafc9 100644
--- a/Marlin/src/gcode/temperature/M303.h
+++ b/Marlin/src/gcode/temperature/M303.cpp
@@ -20,6 +20,9 @@
  *
  */
 
+#include "../gcode.h"
+#include "../../module/temperature.h"
+
 /**
  * M303: PID relay autotune
  *
@@ -28,7 +31,7 @@
  *       C<cycles>
  *       U<bool> with a non-zero value will apply the result to current settings
  */
-void gcode_M303() {
+void GcodeSuite::M303() {
   #if HAS_PID_HEATING
     const int e = parser.intval('E'), c = parser.intval('C', 5);
     const bool u = parser.boolval('U');
diff --git a/Marlin/src/gcode/units/M82_M83.h b/Marlin/src/gcode/units/M82_M83.h
index 63e0436e5c..e0d5409add 100644
--- a/Marlin/src/gcode/units/M82_M83.h
+++ b/Marlin/src/gcode/units/M82_M83.h
@@ -23,9 +23,9 @@
 /**
  * M82: Set E codes absolute (default)
  */
-void gcode_M82() { axis_relative_modes[E_AXIS] = false; }
+void gcode_M82() { gcode.axis_relative_modes[E_AXIS] = false; }
 
 /**
  * M83: Set E codes relative while in Absolute Coordinates (G90) mode
  */
-void gcode_M83() { axis_relative_modes[E_AXIS] = true; }
+void gcode_M83() { gcode.axis_relative_modes[E_AXIS] = true; }
diff --git a/Marlin/src/lcd/ultralcd.cpp b/Marlin/src/lcd/ultralcd.cpp
index 7e40a438e6..34012b4ba2 100644
--- a/Marlin/src/lcd/ultralcd.cpp
+++ b/Marlin/src/lcd/ultralcd.cpp
@@ -30,6 +30,9 @@
 #include "../module/temperature.h"
 #include "../module/planner.h"
 #include "../module/stepper.h"
+#include "../module/motion.h"
+#include "../gcode/gcode.h"
+#include "../gcode/queue.h"
 #include "../module/configuration_store.h"
 
 #include "../Marlin.h"
@@ -1734,7 +1737,7 @@ void kill_screen(const char* lcd_msg) {
       // Encoder knob or keypad buttons adjust the Z position
       //
       if (encoderPosition) {
-        refresh_cmd_timeout();
+        gcode.refresh_cmd_timeout();
         const float z = current_position[Z_AXIS] + float((int32_t)encoderPosition) * (MBL_Z_STEP);
         line_to_z(constrain(z, -(LCD_PROBE_Z_RANGE) * 0.5, (LCD_PROBE_Z_RANGE) * 0.5));
         lcdDrawUpdate = LCDVIEW_CALL_REDRAW_NEXT;
@@ -2280,7 +2283,7 @@ void kill_screen(const char* lcd_msg) {
         x_plot += step_scaler / (ENCODER_STEPS_PER_MENU_ITEM);
         if (abs(step_scaler) >= ENCODER_STEPS_PER_MENU_ITEM)
           step_scaler = 0;
-        refresh_cmd_timeout();
+        gcode.refresh_cmd_timeout();
 
         encoderPosition = 0;
         lcdDrawUpdate = LCDVIEW_REDRAW_NOW;
@@ -2317,7 +2320,7 @@ void kill_screen(const char* lcd_msg) {
           set_current_from_steppers_for_axis(ALL_AXES);
           sync_plan_position();
           ubl_map_move_to_xy(); // Move to new location
-          refresh_cmd_timeout();
+          gcode.refresh_cmd_timeout();
         }
       }
     }
@@ -2702,7 +2705,7 @@ void kill_screen(const char* lcd_msg) {
     if (lcd_clicked) { return lcd_goto_previous_menu(); }
     ENCODER_DIRECTION_NORMAL();
     if (encoderPosition) {
-      refresh_cmd_timeout();
+      gcode.refresh_cmd_timeout();
 
       float min = current_position[axis] - 1000,
             max = current_position[axis] + 1000;
diff --git a/Marlin/src/libs/nozzle.cpp b/Marlin/src/libs/nozzle.cpp
index c8c4732f9e..7b7006ee2c 100644
--- a/Marlin/src/libs/nozzle.cpp
+++ b/Marlin/src/libs/nozzle.cpp
@@ -23,6 +23,7 @@
 #include "nozzle.h"
 
 #include "../Marlin.h"
+#include "../module/motion.h"
 #include "point_t.h"
 
 /**
diff --git a/Marlin/src/module/motion.cpp b/Marlin/src/module/motion.cpp
new file mode 100644
index 0000000000..df227d7e48
--- /dev/null
+++ b/Marlin/src/module/motion.cpp
@@ -0,0 +1,574 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+/**
+ * motion.cpp
+ */
+
+#include "motion.h"
+
+#include "../gcode/gcode.h"
+// #include "../module/planner.h"
+// #include "../Marlin.h"
+// #include "../inc/MarlinConfig.h"
+
+#include "../core/serial.h"
+#include "../module/stepper.h"
+#include "../module/temperature.h"
+
+#if IS_SCARA
+  #include "../libs/buzzer.h"
+  #include "../lcd/ultralcd.h"
+#endif
+
+#if ENABLED(AUTO_BED_LEVELING_UBL)
+  #include "../feature/ubl/ubl.h"
+#endif
+
+#define XYZ_CONSTS(type, array, CONFIG) const PROGMEM type array##_P[XYZ] = { X_##CONFIG, Y_##CONFIG, Z_##CONFIG }
+
+XYZ_CONSTS(float, base_min_pos,   MIN_POS);
+XYZ_CONSTS(float, base_max_pos,   MAX_POS);
+XYZ_CONSTS(float, base_home_pos,  HOME_POS);
+XYZ_CONSTS(float, max_length,     MAX_LENGTH);
+XYZ_CONSTS(float, home_bump_mm,   HOME_BUMP_MM);
+XYZ_CONSTS(signed char, home_dir, HOME_DIR);
+
+// Relative Mode. Enable with G91, disable with G90.
+bool relative_mode = false;
+
+/**
+ * Cartesian Current Position
+ *   Used to track the logical position as moves are queued.
+ *   Used by 'line_to_current_position' to do a move after changing it.
+ *   Used by 'SYNC_PLAN_POSITION_KINEMATIC' to update 'planner.position'.
+ */
+float current_position[XYZE] = { 0.0 };
+
+/**
+ * Cartesian Destination
+ *   A temporary position, usually applied to 'current_position'.
+ *   Set with 'get_destination_from_command' or 'set_destination_to_current'.
+ *   'line_to_destination' sets 'current_position' to 'destination'.
+ */
+float destination[XYZE] = { 0.0 };
+
+// The active extruder (tool). Set with T<extruder> command.
+uint8_t active_extruder = 0;
+
+// The feedrate for the current move, often used as the default if
+// no other feedrate is specified. Overridden for special moves.
+// Set by the last G0 through G5 command's "F" parameter.
+// Functions that override this for custom moves *must always* restore it!
+float feedrate_mm_s = MMM_TO_MMS(1500.0);
+
+/**
+ * sync_plan_position
+ *
+ * Set the planner/stepper positions directly from current_position with
+ * no kinematic translation. Used for homing axes and cartesian/core syncing.
+ */
+void sync_plan_position() {
+  #if ENABLED(DEBUG_LEVELING_FEATURE)
+    if (DEBUGGING(LEVELING)) DEBUG_POS("sync_plan_position", current_position);
+  #endif
+  planner.set_position_mm(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], current_position[E_AXIS]);
+}
+
+void sync_plan_position_e() { planner.set_e_position_mm(current_position[E_AXIS]); }
+
+/**
+ * Move the planner to the current position from wherever it last moved
+ * (or from wherever it has been told it is located).
+ */
+void line_to_current_position() {
+  planner.buffer_line(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], current_position[E_AXIS], feedrate_mm_s, active_extruder);
+}
+
+/**
+ * Move the planner to the position stored in the destination array, which is
+ * used by G0/G1/G2/G3/G5 and many other functions to set a destination.
+ */
+void line_to_destination(const float fr_mm_s) {
+  planner.buffer_line(destination[X_AXIS], destination[Y_AXIS], destination[Z_AXIS], destination[E_AXIS], fr_mm_s, active_extruder);
+}
+
+#if IS_KINEMATIC
+
+  void sync_plan_position_kinematic() {
+    #if ENABLED(DEBUG_LEVELING_FEATURE)
+      if (DEBUGGING(LEVELING)) DEBUG_POS("sync_plan_position_kinematic", current_position);
+    #endif
+    planner.set_position_mm_kinematic(current_position);
+  }
+
+  /**
+   * Calculate delta, start a line, and set current_position to destination
+   */
+  void prepare_uninterpolated_move_to_destination(const float fr_mm_s/*=0.0*/) {
+    #if ENABLED(DEBUG_LEVELING_FEATURE)
+      if (DEBUGGING(LEVELING)) DEBUG_POS("prepare_uninterpolated_move_to_destination", destination);
+    #endif
+
+    gcode.refresh_cmd_timeout();
+
+    #if UBL_DELTA
+      // ubl segmented line will do z-only moves in single segment
+      ubl.prepare_segmented_line_to(destination, MMS_SCALED(fr_mm_s ? fr_mm_s : feedrate_mm_s));
+    #else
+      if ( current_position[X_AXIS] == destination[X_AXIS]
+        && current_position[Y_AXIS] == destination[Y_AXIS]
+        && current_position[Z_AXIS] == destination[Z_AXIS]
+        && current_position[E_AXIS] == destination[E_AXIS]
+      ) return;
+
+      planner.buffer_line_kinematic(destination, MMS_SCALED(fr_mm_s ? fr_mm_s : feedrate_mm_s), active_extruder);
+    #endif
+
+    set_current_to_destination();
+  }
+
+#endif // IS_KINEMATIC
+
+// Software Endstops are based on the configured limits.
+float soft_endstop_min[XYZ] = { X_MIN_BED, Y_MIN_BED, Z_MIN_POS },
+      soft_endstop_max[XYZ] = { X_MAX_BED, Y_MAX_BED, Z_MAX_POS };
+
+#if HAS_SOFTWARE_ENDSTOPS
+
+  // Software Endstops are based on the configured limits.
+  bool soft_endstops_enabled = true;
+
+  /**
+   * Constrain the given coordinates to the software endstops.
+   */
+
+  // NOTE: This makes no sense for delta beds other than Z-axis.
+  //       For delta the X/Y would need to be clamped at
+  //       DELTA_PRINTABLE_RADIUS from center of bed, but delta
+  //       now enforces is_position_reachable for X/Y regardless
+  //       of HAS_SOFTWARE_ENDSTOPS, so that enforcement would be
+  //       redundant here.
+
+  void clamp_to_software_endstops(float target[XYZ]) {
+    if (!soft_endstops_enabled) return;
+    #if ENABLED(MIN_SOFTWARE_ENDSTOPS)
+      #if DISABLED(DELTA)
+        NOLESS(target[X_AXIS], soft_endstop_min[X_AXIS]);
+        NOLESS(target[Y_AXIS], soft_endstop_min[Y_AXIS]);
+      #endif
+      NOLESS(target[Z_AXIS], soft_endstop_min[Z_AXIS]);
+    #endif
+    #if ENABLED(MAX_SOFTWARE_ENDSTOPS)
+      #if DISABLED(DELTA)
+        NOMORE(target[X_AXIS], soft_endstop_max[X_AXIS]);
+        NOMORE(target[Y_AXIS], soft_endstop_max[Y_AXIS]);
+      #endif
+      NOMORE(target[Z_AXIS], soft_endstop_max[Z_AXIS]);
+    #endif
+  }
+
+#endif
+
+#if ENABLED(AUTO_BED_LEVELING_BILINEAR) && !IS_KINEMATIC
+
+  #define CELL_INDEX(A,V) ((RAW_##A##_POSITION(V) - bilinear_start[A##_AXIS]) * ABL_BG_FACTOR(A##_AXIS))
+
+  /**
+   * Prepare a bilinear-leveled linear move on Cartesian,
+   * splitting the move where it crosses grid borders.
+   */
+  void bilinear_line_to_destination(const float fr_mm_s, uint16_t x_splits=0xFFFF, uint16_t y_splits=0xFFFF);
+    int cx1 = CELL_INDEX(X, current_position[X_AXIS]),
+        cy1 = CELL_INDEX(Y, current_position[Y_AXIS]),
+        cx2 = CELL_INDEX(X, destination[X_AXIS]),
+        cy2 = CELL_INDEX(Y, destination[Y_AXIS]);
+    cx1 = constrain(cx1, 0, ABL_BG_POINTS_X - 2);
+    cy1 = constrain(cy1, 0, ABL_BG_POINTS_Y - 2);
+    cx2 = constrain(cx2, 0, ABL_BG_POINTS_X - 2);
+    cy2 = constrain(cy2, 0, ABL_BG_POINTS_Y - 2);
+
+    if (cx1 == cx2 && cy1 == cy2) {
+      // Start and end on same mesh square
+      line_to_destination(fr_mm_s);
+      set_current_to_destination();
+      return;
+    }
+
+    #define LINE_SEGMENT_END(A) (current_position[A ##_AXIS] + (destination[A ##_AXIS] - current_position[A ##_AXIS]) * normalized_dist)
+
+    float normalized_dist, end[XYZE];
+
+    // Split at the left/front border of the right/top square
+    const int8_t gcx = max(cx1, cx2), gcy = max(cy1, cy2);
+    if (cx2 != cx1 && TEST(x_splits, gcx)) {
+      COPY(end, destination);
+      destination[X_AXIS] = LOGICAL_X_POSITION(bilinear_start[X_AXIS] + ABL_BG_SPACING(X_AXIS) * gcx);
+      normalized_dist = (destination[X_AXIS] - current_position[X_AXIS]) / (end[X_AXIS] - current_position[X_AXIS]);
+      destination[Y_AXIS] = LINE_SEGMENT_END(Y);
+      CBI(x_splits, gcx);
+    }
+    else if (cy2 != cy1 && TEST(y_splits, gcy)) {
+      COPY(end, destination);
+      destination[Y_AXIS] = LOGICAL_Y_POSITION(bilinear_start[Y_AXIS] + ABL_BG_SPACING(Y_AXIS) * gcy);
+      normalized_dist = (destination[Y_AXIS] - current_position[Y_AXIS]) / (end[Y_AXIS] - current_position[Y_AXIS]);
+      destination[X_AXIS] = LINE_SEGMENT_END(X);
+      CBI(y_splits, gcy);
+    }
+    else {
+      // Already split on a border
+      line_to_destination(fr_mm_s);
+      set_current_to_destination();
+      return;
+    }
+
+    destination[Z_AXIS] = LINE_SEGMENT_END(Z);
+    destination[E_AXIS] = LINE_SEGMENT_END(E);
+
+    // Do the split and look for more borders
+    bilinear_line_to_destination(fr_mm_s, x_splits, y_splits);
+
+    // Restore destination from stack
+    COPY(destination, end);
+    bilinear_line_to_destination(fr_mm_s, x_splits, y_splits);
+  }
+
+#endif // AUTO_BED_LEVELING_BILINEAR
+
+#if IS_KINEMATIC && !UBL_DELTA
+
+  /**
+   * Prepare a linear move in a DELTA or SCARA setup.
+   *
+   * This calls planner.buffer_line several times, adding
+   * small incremental moves for DELTA or SCARA.
+   */
+  inline bool prepare_kinematic_move_to(float ltarget[XYZE]) {
+
+    // Get the top feedrate of the move in the XY plane
+    const float _feedrate_mm_s = MMS_SCALED(feedrate_mm_s);
+
+    // If the move is only in Z/E don't split up the move
+    if (ltarget[X_AXIS] == current_position[X_AXIS] && ltarget[Y_AXIS] == current_position[Y_AXIS]) {
+      planner.buffer_line_kinematic(ltarget, _feedrate_mm_s, active_extruder);
+      return false;
+    }
+
+    // Fail if attempting move outside printable radius
+    if (!position_is_reachable_xy(ltarget[X_AXIS], ltarget[Y_AXIS])) return true;
+
+    // Get the cartesian distances moved in XYZE
+    const float difference[XYZE] = {
+      ltarget[X_AXIS] - current_position[X_AXIS],
+      ltarget[Y_AXIS] - current_position[Y_AXIS],
+      ltarget[Z_AXIS] - current_position[Z_AXIS],
+      ltarget[E_AXIS] - current_position[E_AXIS]
+    };
+
+    // Get the linear distance in XYZ
+    float cartesian_mm = SQRT(sq(difference[X_AXIS]) + sq(difference[Y_AXIS]) + sq(difference[Z_AXIS]));
+
+    // If the move is very short, check the E move distance
+    if (UNEAR_ZERO(cartesian_mm)) cartesian_mm = FABS(difference[E_AXIS]);
+
+    // No E move either? Game over.
+    if (UNEAR_ZERO(cartesian_mm)) return true;
+
+    // Minimum number of seconds to move the given distance
+    const float seconds = cartesian_mm / _feedrate_mm_s;
+
+    // The number of segments-per-second times the duration
+    // gives the number of segments
+    uint16_t segments = delta_segments_per_second * seconds;
+
+    // For SCARA minimum segment size is 0.25mm
+    #if IS_SCARA
+      NOMORE(segments, cartesian_mm * 4);
+    #endif
+
+    // At least one segment is required
+    NOLESS(segments, 1);
+
+    // The approximate length of each segment
+    const float inv_segments = 1.0 / float(segments),
+                segment_distance[XYZE] = {
+                  difference[X_AXIS] * inv_segments,
+                  difference[Y_AXIS] * inv_segments,
+                  difference[Z_AXIS] * inv_segments,
+                  difference[E_AXIS] * inv_segments
+                };
+
+    // SERIAL_ECHOPAIR("mm=", cartesian_mm);
+    // SERIAL_ECHOPAIR(" seconds=", seconds);
+    // SERIAL_ECHOLNPAIR(" segments=", segments);
+
+    #if IS_SCARA && ENABLED(SCARA_FEEDRATE_SCALING)
+      // SCARA needs to scale the feed rate from mm/s to degrees/s
+      const float inv_segment_length = min(10.0, float(segments) / cartesian_mm), // 1/mm/segs
+                  feed_factor = inv_segment_length * _feedrate_mm_s;
+      float oldA = stepper.get_axis_position_degrees(A_AXIS),
+            oldB = stepper.get_axis_position_degrees(B_AXIS);
+    #endif
+
+    // Get the logical current position as starting point
+    float logical[XYZE];
+    COPY(logical, current_position);
+
+    // Drop one segment so the last move is to the exact target.
+    // If there's only 1 segment, loops will be skipped entirely.
+    --segments;
+
+    // Calculate and execute the segments
+    for (uint16_t s = segments + 1; --s;) {
+      LOOP_XYZE(i) logical[i] += segment_distance[i];
+      #if ENABLED(DELTA)
+        DELTA_LOGICAL_IK(); // Delta can inline its kinematics
+      #else
+        inverse_kinematics(logical);
+      #endif
+
+      ADJUST_DELTA(logical); // Adjust Z if bed leveling is enabled
+
+      #if IS_SCARA && ENABLED(SCARA_FEEDRATE_SCALING)
+        // For SCARA scale the feed rate from mm/s to degrees/s
+        // Use ratio between the length of the move and the larger angle change
+        const float adiff = abs(delta[A_AXIS] - oldA),
+                    bdiff = abs(delta[B_AXIS] - oldB);
+        planner.buffer_line(delta[A_AXIS], delta[B_AXIS], delta[C_AXIS], logical[E_AXIS], max(adiff, bdiff) * feed_factor, active_extruder);
+        oldA = delta[A_AXIS];
+        oldB = delta[B_AXIS];
+      #else
+        planner.buffer_line(delta[A_AXIS], delta[B_AXIS], delta[C_AXIS], logical[E_AXIS], _feedrate_mm_s, active_extruder);
+      #endif
+    }
+
+    // Since segment_distance is only approximate,
+    // the final move must be to the exact destination.
+
+    #if IS_SCARA && ENABLED(SCARA_FEEDRATE_SCALING)
+      // For SCARA scale the feed rate from mm/s to degrees/s
+      // With segments > 1 length is 1 segment, otherwise total length
+      inverse_kinematics(ltarget);
+      ADJUST_DELTA(ltarget);
+      const float adiff = abs(delta[A_AXIS] - oldA),
+                  bdiff = abs(delta[B_AXIS] - oldB);
+      planner.buffer_line(delta[A_AXIS], delta[B_AXIS], delta[C_AXIS], logical[E_AXIS], max(adiff, bdiff) * feed_factor, active_extruder);
+    #else
+      planner.buffer_line_kinematic(ltarget, _feedrate_mm_s, active_extruder);
+    #endif
+
+    return false;
+  }
+
+#else // !IS_KINEMATIC || UBL_DELTA
+
+  /**
+   * Prepare a linear move in a Cartesian setup.
+   * If Mesh Bed Leveling is enabled, perform a mesh move.
+   *
+   * Returns true if the caller didn't update current_position.
+   */
+  inline bool prepare_move_to_destination_cartesian() {
+    #if ENABLED(AUTO_BED_LEVELING_UBL)
+      const float fr_scaled = MMS_SCALED(feedrate_mm_s);
+      if (ubl.state.active) { // direct use of ubl.state.active for speed
+        ubl.line_to_destination_cartesian(fr_scaled, active_extruder);
+        return true;
+      }
+      else
+        line_to_destination(fr_scaled);
+    #else
+      // Do not use feedrate_percentage for E or Z only moves
+      if (current_position[X_AXIS] == destination[X_AXIS] && current_position[Y_AXIS] == destination[Y_AXIS])
+        line_to_destination();
+      else {
+        const float fr_scaled = MMS_SCALED(feedrate_mm_s);
+        #if ENABLED(MESH_BED_LEVELING)
+          if (mbl.active()) { // direct used of mbl.active() for speed
+            mesh_line_to_destination(fr_scaled);
+            return true;
+          }
+          else
+        #elif ENABLED(AUTO_BED_LEVELING_BILINEAR)
+          if (planner.abl_enabled) { // direct use of abl_enabled for speed
+            bilinear_line_to_destination(fr_scaled);
+            return true;
+          }
+          else
+        #endif
+            line_to_destination(fr_scaled);
+      }
+    #endif
+    return false;
+  }
+
+#endif // !IS_KINEMATIC || UBL_DELTA
+
+#if ENABLED(DUAL_X_CARRIAGE) || ENABLED(DUAL_NOZZLE_DUPLICATION_MODE)
+  bool extruder_duplication_enabled = false;                              // Used in Dual X mode 2
+#endif
+
+#if ENABLED(DUAL_X_CARRIAGE)
+
+  DualXMode dual_x_carriage_mode         = DEFAULT_DUAL_X_CARRIAGE_MODE;
+  float inactive_extruder_x_pos          = X2_MAX_POS,                    // used in mode 0 & 1
+        raised_parked_position[XYZE],                                     // used in mode 1
+        duplicate_extruder_x_offset      = DEFAULT_DUPLICATION_X_OFFSET;  // used in mode 2
+  bool active_extruder_parked            = false;                         // used in mode 1 & 2
+  millis_t delayed_move_time             = 0;                             // used in mode 1
+  int16_t duplicate_extruder_temp_offset = 0;                             // used in mode 2
+
+  float x_home_pos(const int extruder) {
+    if (extruder == 0)
+      return LOGICAL_X_POSITION(base_home_pos(X_AXIS));
+    else
+      /**
+       * In dual carriage mode the extruder offset provides an override of the
+       * second X-carriage position when homed - otherwise X2_HOME_POS is used.
+       * This allows soft recalibration of the second extruder home position
+       * without firmware reflash (through the M218 command).
+       */
+      return LOGICAL_X_POSITION(hotend_offset[X_AXIS][1] > 0 ? hotend_offset[X_AXIS][1] : X2_HOME_POS);
+  }
+
+  /**
+   * Prepare a linear move in a dual X axis setup
+   */
+  inline bool prepare_move_to_destination_dualx() {
+    if (active_extruder_parked) {
+      switch (dual_x_carriage_mode) {
+        case DXC_FULL_CONTROL_MODE:
+          break;
+        case DXC_AUTO_PARK_MODE:
+          if (current_position[E_AXIS] == destination[E_AXIS]) {
+            // This is a travel move (with no extrusion)
+            // Skip it, but keep track of the current position
+            // (so it can be used as the start of the next non-travel move)
+            if (delayed_move_time != 0xFFFFFFFFUL) {
+              set_current_to_destination();
+              NOLESS(raised_parked_position[Z_AXIS], destination[Z_AXIS]);
+              delayed_move_time = millis();
+              return true;
+            }
+          }
+          // unpark extruder: 1) raise, 2) move into starting XY position, 3) lower
+          for (uint8_t i = 0; i < 3; i++)
+            planner.buffer_line(
+              i == 0 ? raised_parked_position[X_AXIS] : current_position[X_AXIS],
+              i == 0 ? raised_parked_position[Y_AXIS] : current_position[Y_AXIS],
+              i == 2 ? current_position[Z_AXIS] : raised_parked_position[Z_AXIS],
+              current_position[E_AXIS],
+              i == 1 ? PLANNER_XY_FEEDRATE() : planner.max_feedrate_mm_s[Z_AXIS],
+              active_extruder
+            );
+          delayed_move_time = 0;
+          active_extruder_parked = false;
+          #if ENABLED(DEBUG_LEVELING_FEATURE)
+            if (DEBUGGING(LEVELING)) SERIAL_ECHOLNPGM("Clear active_extruder_parked");
+          #endif
+          break;
+        case DXC_DUPLICATION_MODE:
+          if (active_extruder == 0) {
+            #if ENABLED(DEBUG_LEVELING_FEATURE)
+              if (DEBUGGING(LEVELING)) {
+                SERIAL_ECHOPAIR("Set planner X", LOGICAL_X_POSITION(inactive_extruder_x_pos));
+                SERIAL_ECHOLNPAIR(" ... Line to X", current_position[X_AXIS] + duplicate_extruder_x_offset);
+              }
+            #endif
+            // move duplicate extruder into correct duplication position.
+            planner.set_position_mm(
+              LOGICAL_X_POSITION(inactive_extruder_x_pos),
+              current_position[Y_AXIS],
+              current_position[Z_AXIS],
+              current_position[E_AXIS]
+            );
+            planner.buffer_line(
+              current_position[X_AXIS] + duplicate_extruder_x_offset,
+              current_position[Y_AXIS], current_position[Z_AXIS], current_position[E_AXIS],
+              planner.max_feedrate_mm_s[X_AXIS], 1
+            );
+            SYNC_PLAN_POSITION_KINEMATIC();
+            stepper.synchronize();
+            extruder_duplication_enabled = true;
+            active_extruder_parked = false;
+            #if ENABLED(DEBUG_LEVELING_FEATURE)
+              if (DEBUGGING(LEVELING)) SERIAL_ECHOLNPGM("Set extruder_duplication_enabled\nClear active_extruder_parked");
+            #endif
+          }
+          else {
+            #if ENABLED(DEBUG_LEVELING_FEATURE)
+              if (DEBUGGING(LEVELING)) SERIAL_ECHOLNPGM("Active extruder not 0");
+            #endif
+          }
+          break;
+      }
+    }
+    return false;
+  }
+
+#endif // DUAL_X_CARRIAGE
+
+/**
+ * Prepare a single move and get ready for the next one
+ *
+ * This may result in several calls to planner.buffer_line to
+ * do smaller moves for DELTA, SCARA, mesh moves, etc.
+ */
+void prepare_move_to_destination() {
+  clamp_to_software_endstops(destination);
+  gcode.refresh_cmd_timeout();
+
+  #if ENABLED(PREVENT_COLD_EXTRUSION)
+
+    if (!DEBUGGING(DRYRUN)) {
+      if (destination[E_AXIS] != current_position[E_AXIS]) {
+        if (thermalManager.tooColdToExtrude(active_extruder)) {
+          current_position[E_AXIS] = destination[E_AXIS]; // Behave as if the move really took place, but ignore E part
+          SERIAL_ECHO_START();
+          SERIAL_ECHOLNPGM(MSG_ERR_COLD_EXTRUDE_STOP);
+        }
+        #if ENABLED(PREVENT_LENGTHY_EXTRUDE)
+          if (destination[E_AXIS] - current_position[E_AXIS] > EXTRUDE_MAXLENGTH) {
+            current_position[E_AXIS] = destination[E_AXIS]; // Behave as if the move really took place, but ignore E part
+            SERIAL_ECHO_START();
+            SERIAL_ECHOLNPGM(MSG_ERR_LONG_EXTRUDE_STOP);
+          }
+        #endif
+      }
+    }
+
+  #endif
+
+  if (
+    #if UBL_DELTA // Also works for CARTESIAN (smaller segments follow mesh more closely)
+      ubl.prepare_segmented_line_to(destination, feedrate_mm_s)
+    #elif IS_KINEMATIC
+      prepare_kinematic_move_to(destination)
+    #elif ENABLED(DUAL_X_CARRIAGE)
+      prepare_move_to_destination_dualx() || prepare_move_to_destination_cartesian()
+    #else
+      prepare_move_to_destination_cartesian()
+    #endif
+  ) return;
+
+  set_current_to_destination();
+}
diff --git a/Marlin/src/module/motion.h b/Marlin/src/module/motion.h
new file mode 100644
index 0000000000..f146c3c0a2
--- /dev/null
+++ b/Marlin/src/module/motion.h
@@ -0,0 +1,237 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+/**
+ * motion.h
+ *
+ * High-level motion commands to feed the planner
+ * Some of these methods may migrate to the planner class.
+ */
+
+#ifndef MOTION_H
+#define MOTION_H
+
+#include "../inc/MarlinConfig.h"
+
+//#include "../HAL/HAL.h"
+
+// #if ENABLED(DELTA)
+//   #include "../module/delta.h"
+// #endif
+
+extern bool relative_mode;
+
+extern float current_position[XYZE], destination[XYZE];
+
+extern float feedrate_mm_s;
+
+extern uint8_t active_extruder;
+
+extern float soft_endstop_min[XYZ], soft_endstop_max[XYZ];
+
+FORCE_INLINE float pgm_read_any(const float *p) { return pgm_read_float_near(p); }
+FORCE_INLINE signed char pgm_read_any(const signed char *p) { return pgm_read_byte_near(p); }
+
+#define XYZ_DEFS(type, array, CONFIG) \
+  extern const type array##_P[XYZ]; \
+  FORCE_INLINE type array(AxisEnum axis) { return pgm_read_any(&array##_P[axis]); } \
+  typedef void __void_##CONFIG##__
+
+XYZ_DEFS(float, base_min_pos,   MIN_POS);
+XYZ_DEFS(float, base_max_pos,   MAX_POS);
+XYZ_DEFS(float, base_home_pos,  HOME_POS);
+XYZ_DEFS(float, max_length,     MAX_LENGTH);
+XYZ_DEFS(float, home_bump_mm,   HOME_BUMP_MM);
+XYZ_DEFS(signed char, home_dir, HOME_DIR);
+
+#if HAS_SOFTWARE_ENDSTOPS
+  extern bool soft_endstops_enabled;
+  void clamp_to_software_endstops(float target[XYZ]);
+#else
+  #define soft_endstops_enabled false
+  #define clamp_to_software_endstops(x) NOOP
+#endif
+
+inline void set_current_to_destination() { COPY(current_position, destination); }
+inline void set_destination_to_current() { COPY(destination, current_position); }
+
+/**
+ * sync_plan_position
+ *
+ * Set the planner/stepper positions directly from current_position with
+ * no kinematic translation. Used for homing axes and cartesian/core syncing.
+ */
+void sync_plan_position();
+void sync_plan_position_e();
+
+#if IS_KINEMATIC
+  void sync_plan_position_kinematic();
+  #define SYNC_PLAN_POSITION_KINEMATIC() sync_plan_position_kinematic()
+#else
+  #define SYNC_PLAN_POSITION_KINEMATIC() sync_plan_position()
+#endif
+
+/**
+ * Move the planner to the current position from wherever it last moved
+ * (or from wherever it has been told it is located).
+ */
+void line_to_current_position();
+
+/**
+ * Move the planner to the position stored in the destination array, which is
+ * used by G0/G1/G2/G3/G5 and many other functions to set a destination.
+ */
+void line_to_destination(const float fr_mm_s);
+
+inline void line_to_destination() { line_to_destination(feedrate_mm_s); }
+
+#if IS_KINEMATIC
+  void prepare_uninterpolated_move_to_destination(const float fr_mm_s=0.0);
+#endif
+
+void prepare_move_to_destination();
+
+void clamp_to_software_endstops(float target[XYZ]);
+
+//
+// Macros
+//
+
+// Workspace offsets
+#if HAS_WORKSPACE_OFFSET
+  #if HAS_HOME_OFFSET
+    extern float home_offset[XYZ];
+  #endif
+  #if HAS_POSITION_SHIFT
+    extern float position_shift[XYZ];
+  #endif
+#endif
+
+#if HAS_HOME_OFFSET && HAS_POSITION_SHIFT
+  extern float workspace_offset[XYZ];
+  #define WORKSPACE_OFFSET(AXIS) workspace_offset[AXIS]
+#elif HAS_HOME_OFFSET
+  #define WORKSPACE_OFFSET(AXIS) home_offset[AXIS]
+#elif HAS_POSITION_SHIFT
+  #define WORKSPACE_OFFSET(AXIS) position_shift[AXIS]
+#else
+  #define WORKSPACE_OFFSET(AXIS) 0
+#endif
+
+#define LOGICAL_POSITION(POS, AXIS) ((POS) + WORKSPACE_OFFSET(AXIS))
+#define RAW_POSITION(POS, AXIS)     ((POS) - WORKSPACE_OFFSET(AXIS))
+
+#if HAS_POSITION_SHIFT || DISABLED(DELTA)
+  #define LOGICAL_X_POSITION(POS)   LOGICAL_POSITION(POS, X_AXIS)
+  #define LOGICAL_Y_POSITION(POS)   LOGICAL_POSITION(POS, Y_AXIS)
+  #define RAW_X_POSITION(POS)       RAW_POSITION(POS, X_AXIS)
+  #define RAW_Y_POSITION(POS)       RAW_POSITION(POS, Y_AXIS)
+#else
+  #define LOGICAL_X_POSITION(POS)   (POS)
+  #define LOGICAL_Y_POSITION(POS)   (POS)
+  #define RAW_X_POSITION(POS)       (POS)
+  #define RAW_Y_POSITION(POS)       (POS)
+#endif
+
+#define LOGICAL_Z_POSITION(POS)     LOGICAL_POSITION(POS, Z_AXIS)
+#define RAW_Z_POSITION(POS)         RAW_POSITION(POS, Z_AXIS)
+#define RAW_CURRENT_POSITION(A)     RAW_##A##_POSITION(current_position[A##_AXIS])
+
+/**
+ * position_is_reachable family of functions
+ */
+
+#if IS_KINEMATIC // (DELTA or SCARA)
+
+  #if IS_SCARA
+    extern const float L1, L2;
+  #endif
+
+  inline bool position_is_reachable_raw_xy(const float &rx, const float &ry) {
+    #if ENABLED(DELTA)
+      return HYPOT2(rx, ry) <= sq(DELTA_PRINTABLE_RADIUS);
+    #elif IS_SCARA
+      #if MIDDLE_DEAD_ZONE_R > 0
+        const float R2 = HYPOT2(rx - SCARA_OFFSET_X, ry - SCARA_OFFSET_Y);
+        return R2 >= sq(float(MIDDLE_DEAD_ZONE_R)) && R2 <= sq(L1 + L2);
+      #else
+        return HYPOT2(rx - SCARA_OFFSET_X, ry - SCARA_OFFSET_Y) <= sq(L1 + L2);
+      #endif
+    #else // CARTESIAN
+      // To be migrated from MakerArm branch in future
+    #endif
+  }
+
+  inline bool position_is_reachable_by_probe_raw_xy(const float &rx, const float &ry) {
+
+    // Both the nozzle and the probe must be able to reach the point.
+    // This won't work on SCARA since the probe offset rotates with the arm.
+
+    return position_is_reachable_raw_xy(rx, ry)
+        && position_is_reachable_raw_xy(rx - X_PROBE_OFFSET_FROM_EXTRUDER, ry - Y_PROBE_OFFSET_FROM_EXTRUDER);
+  }
+
+#else // CARTESIAN
+
+  inline bool position_is_reachable_raw_xy(const float &rx, const float &ry) {
+      // Add 0.001 margin to deal with float imprecision
+      return WITHIN(rx, X_MIN_POS - 0.001, X_MAX_POS + 0.001)
+          && WITHIN(ry, Y_MIN_POS - 0.001, Y_MAX_POS + 0.001);
+  }
+
+  inline bool position_is_reachable_by_probe_raw_xy(const float &rx, const float &ry) {
+      // Add 0.001 margin to deal with float imprecision
+      return WITHIN(rx, MIN_PROBE_X - 0.001, MAX_PROBE_X + 0.001)
+          && WITHIN(ry, MIN_PROBE_Y - 0.001, MAX_PROBE_Y + 0.001);
+  }
+
+#endif // CARTESIAN
+
+FORCE_INLINE bool position_is_reachable_by_probe_xy(const float &lx, const float &ly) {
+  return position_is_reachable_by_probe_raw_xy(RAW_X_POSITION(lx), RAW_Y_POSITION(ly));
+}
+
+FORCE_INLINE bool position_is_reachable_xy(const float &lx, const float &ly) {
+  return position_is_reachable_raw_xy(RAW_X_POSITION(lx), RAW_Y_POSITION(ly));
+}
+
+#if ENABLED(DUAL_X_CARRIAGE) || ENABLED(DUAL_NOZZLE_DUPLICATION_MODE)
+  extern bool extruder_duplication_enabled;       // Used in Dual X mode 2
+#endif
+
+#if ENABLED(DUAL_X_CARRIAGE)
+
+  extern DualXMode dual_x_carriage_mode;
+  extern float inactive_extruder_x_pos,           // used in mode 0 & 1
+               raised_parked_position[XYZE],      // used in mode 1
+               duplicate_extruder_x_offset;       // used in mode 2
+  extern bool active_extruder_parked;             // used in mode 1 & 2
+  extern millis_t delayed_move_time;              // used in mode 1
+  extern int16_t duplicate_extruder_temp_offset;  // used in mode 2
+
+  float x_home_pos(const int extruder);
+
+  FORCE_INLINE int x_home_dir(const uint8_t extruder) { return extruder ? X2_HOME_DIR : X_HOME_DIR; }
+
+#endif // DUAL_X_CARRIAGE
+
+#endif // MOTION_H
diff --git a/Marlin/src/module/planner.cpp b/Marlin/src/module/planner.cpp
index c0e3b3a675..c239b324b4 100644
--- a/Marlin/src/module/planner.cpp
+++ b/Marlin/src/module/planner.cpp
@@ -60,6 +60,7 @@
 
 #include "planner.h"
 #include "stepper.h"
+#include "motion.h"
 #include "../module/temperature.h"
 #include "../lcd/ultralcd.h"
 #include "../core/language.h"
diff --git a/Marlin/src/module/planner_bezier.cpp b/Marlin/src/module/planner_bezier.cpp
index fe0a652b5e..e5becc10c4 100644
--- a/Marlin/src/module/planner_bezier.cpp
+++ b/Marlin/src/module/planner_bezier.cpp
@@ -31,10 +31,13 @@
 
 #if ENABLED(BEZIER_CURVE_SUPPORT)
 
+#include "planner.h"
+#include "motion.h"
+#include "temperature.h"
+
 #include "../Marlin.h"
-#include "../module/planner.h"
 #include "../core/language.h"
-#include "../module/temperature.h"
+#include "../gcode/queue.h"
 
 // See the meaning in the documentation of cubic_b_spline().
 #define MIN_STEP 0.002
diff --git a/Marlin/src/module/stepper.cpp b/Marlin/src/module/stepper.cpp
index 5835238d5f..fecb5c7a99 100644
--- a/Marlin/src/module/stepper.cpp
+++ b/Marlin/src/module/stepper.cpp
@@ -57,6 +57,7 @@
 #include "../module/temperature.h"
 #include "../lcd/ultralcd.h"
 #include "../core/language.h"
+#include "../gcode/queue.h"
 #include "../sd/cardreader.h"
 
 #if MB(ALLIGATOR)
diff --git a/Marlin/src/sd/cardreader.cpp b/Marlin/src/sd/cardreader.cpp
index 87be1e8a67..0292375d0f 100644
--- a/Marlin/src/sd/cardreader.cpp
+++ b/Marlin/src/sd/cardreader.cpp
@@ -31,6 +31,7 @@
 #include "../module/stepper.h"
 #include "../module/printcounter.h"
 #include "../core/language.h"
+#include "../gcode/queue.h"
 
 #include <ctype.h>