mirror of
https://github.com/tildearrow/furnace.git
synced 2024-11-19 11:05:11 +00:00
26 lines
882 B
Markdown
26 lines
882 B
Markdown
# Yamaha YM2151
|
|
|
|
the sound chip powering the Arcade system, available for standalone use if you want to make X68000 music or pair it with a 16-channel Sega PCM when it comes.
|
|
|
|
# effects
|
|
|
|
- `10xx`: set noise frequency of channel 8 operator 4. 00 disables noise while 01 to 20 enables it.
|
|
- `11xx`: set feedback of channel.
|
|
- `12xx`: set operator 1 level.
|
|
- `13xx`: set operator 2 level.
|
|
- `14xx`: set operator 3 level.
|
|
- `15xx`: set operator 4 level.
|
|
- `16xy`: set multiplier of operator.
|
|
- `x` is the operator (1-4).
|
|
- `y` is the mutliplier.
|
|
- `17xx`: set LFO speed.
|
|
- `18xx`: set LFO waveform. `xx` may be one of the following:
|
|
- `00`: saw
|
|
- `01`: square
|
|
- `02`: triangle
|
|
- `03`: noise
|
|
- `19xx`: set attack of all operators.
|
|
- `1Axx`: set attack of operator 1.
|
|
- `1Bxx`: set attack of operator 2.
|
|
- `1Cxx`: set attack of operator 3.
|
|
- `1Dxx`: set attack of operator 4.
|