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