furnace/doc/7-systems/game-boy.md
Electric Keet 4748e185a7 Fixing something I botched.
Hey, all those files I thought I clobbered!
2023-06-23 18:13:37 -07:00

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# Game Boy
the Nintendo Game Boy is one of the most successful portable game systems ever made.
with stereo sound, two pulse channels, a wave channel and a noise one it packed some serious punch.
# effects
- **`10xx`**: change wave.
- **`11xx`**: set noise length. `xx` may be one of:
- 0: long
- 1: short
- **`12xx`**: set duty cycle (from 0 to 3).
- **`13xy`**: setup sweep (pulse channels only).
- `x` is the time.
- `y` is the shift.
- set to 0 to disable it.
- **`14xx`**: set sweep direction. 0 is up and 1 is down.