Firmware/ArduinoAddons/Arduino_1.x.x/sanguino/bootloaders/atmega644p
..
ATmegaBOOT_644P.elf
ATmegaBOOT_644P.hex
ATmegaBOOT.c
ATmegaBOOT.c.tst
Makefile
README.txt

Note: This bootloader support ATmega644, ATmega644P and ATmega324P.
To build, set PROGRAM and MCU_TARGET in the Makefile according to your target device.