Super Game Boy / Noise channel mixer
- A activates SGB sound A/B
- A while holding START clears SGB sound
- A while holding SELECT+START resets SGB sound
- B activates CH4 noise
- B while holding START clears CH4 noise
- B while holding SELECT+START resets CH4 noise
- START triggers all three in unison
- D-pad adjusts/moves between params
- Adjust while holding A/B/START provides constant feedback
- SELECT moves between param groups
- A while holding toggles SGB sound A/B
- Up/Down while holding moves to respective param group
- A+B displays the parameter string
| Register | Alt | Bits | Digit | Bits |
|---|---|---|---|---|
| SOUND01 | 4 - 5 | 0 | 0 - 1 | |
| SOUND01 | 0 - 3 | 1 | ||
| SOUND02 | 4 | 0 | 2 | |
| SOUND02 | 0 - 3 | 2 | ||
| SOUND03 | 0 - 3 | 3 | ||
| SOUND03 | 4 - 7 | 4 | ||
| AUD4LEN | NR41 | 4 | 0 | 3 |
| AUD4LEN | NR41 | 0 - 3 | 5 | |
| AUD4ENV | NR42 | 4 - 7 | 6 | |
| AUD4ENV | NR42 | 0 - 3 | 7 | |
| AUD4POLY | NR43 | 4 - 7 | 8 | |
| AUD4POLY | NR43 | 0 - 3 | 9 | |
| AUD4GO | NR44 | 6 | Border |
make
Known to work with RGBDS 0.9.2 on MSYS64.
Due to the tight schedule of GB Compo 2025, the following features have been left for a future release:
- Top part enable/disable animations
- Top part digit animations
- Bugfixes
The tool has been designed with accessibility in mind. High-contrast assets are utilised for the benefit of the visually-impaired user.
- Nikku4211 for inspiring the creation of this tool and for initial testing
- m2m for testing on actual SGB and SGB2 hardware
- Rangi42 for patiently answering every dumb question
- Marc Robledo for creating some great GB development tools
- The entire GBdev community for their awesomeness
- avivace and bbbbbr for organising GB Compo 2025
- itch.io for hosting the event
- the judges for their hard work