open source Dumper and/or Flasher for GBA composed of three parts:

1. DFAGB, a multiboot rom runs on GBA, do the actual dump/flash work. needs devkitARM to compile.
2. PC client, send multiboot rom and/or talk with DFAGB. Windows only, should be easy to port though. needs Visual Studio to compile.
3. uCSIO, a micro controller firmware runs on Teensy(2.0/++2.0) and/or Arduino(Leonardo/Micro), it uses GPIO to bit bang the GBA SIO port and talk to the PC client as a USB serial port. needs AVR8 Toolchain to compile.

It can:

• send multiboot rom to GBA.
• Dump GBA cartridge.
• Program GBA flash cart. currently supports only flash carts using a single Intel 28F128J3F(or similar chips in the J3 family).
• SRAM save read/write.
• EEPROM save read/write.

uCSIO Pin connection(GBA - ATmega)

SC - PB1/SCLK
SI - PB2/MOSI
SO - PB3/MISO
and obviously GND

GBA is 3.3V so I use a Voltage Level Translator on SC and SI, no need to do this on SO since ATmega treats 3.3V as high even running on 5V.

Future plans:

• FLASH save read/write.
• Support more insteresting GBA flash carts, if I found any.

Trivia

• the particular flash cart using Intel 28F128J3F is the original motivation of this project, which is a charm since it uses FRAM for save, but relies on a flasher which was discontinued years ago.
• EEPROM save handling is another motivation of this project, I bid a Zelda ALTTP cart from eBay which turned out to be counterfeit, but before I know that I've already played on it and had a perfect save which I wanted to transfer to a genuine cart.

Credits

• GBATEK
• devkitARM
• Daniel Tang for the USB-GBA multiboot project which I copied a lot.
• Chishm for the SendSave as an example on how to read / write EEPROM.

License

GPL v3