gba-multiboot
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Published
20 hours ago •
merryhime
merryhime
Boot up a GameBoy Advance though its serial port without a flash cartridge. SPI bit-banged on a Teensy.
Project parts
-
sender: Runs on the PC, communicates with Teensy over serial, most logic here, sends program to GBA. -
teensy-passthrough: Bitbanged SPI on the Teensy. -
gba-hello-world: Example hello world program. -
recver: Runs on the PC, communicates with Teensy over serial, receives serial output of uploaded program.
Dependencies
- avr-gcc for Teensy passthrough
- devkitPro for hello world program
Building
cd sender
./build.sh
cd ../recver
./build.sh
cd ../teensy-passthrough
make
# Upload teensy-passthrough.hex to Teensy
cd ../gba-hello-world
make
cd ..
Example usage
./sender/sender ./gba-hello-world/gba-hello-world_mb.gba && ./recver/recver
Pin numbering
GBA Link-Cable
_________
/ 6 4 2 \
\_5_ 3 _1_/
'-'
GBA Socket
___________
| 2 4 6 |
\_1_ 3 _5_/
'-'
Wiring
| Teensy Pin | GBA Pin | Purpose | My Cable Colour |
|---|---|---|---|
| B0 | 5 | SC / CLK | Red |
| B1 | 3 | SI / MOSI | White |
| B2 | 2 | SO / MISO | Black |
| GND | 6 | GND | - |
Note: The cable colours used by your cable are very likely different. If your cable doesn't have a GND pin, connecting to battery ground also works.
Legal
To the extent possible under law, the author(s) have dedicated all copyright and related and neighboring rights to this software to the public domain worldwide.
This software is distributed without any warranty.
You should have received a copy of the CC0 Public Domain Dedication along with this software. If not, see http://creativecommons.org/publicdomain/zero/1.0/.
merryhime