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878 B
878 B
Yamaha YM2612
one of two chips that powered the Sega Genesis. It is a six-channel, four-operator FM synthesizer. Channel #6 can be turned into 8-bit PCM player.
effects
10xy
: set LFO parameters.x
toggles the LFO.y
sets its speed.
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
: enable PCM channel.- this only works on channel 6.
18xx
: toggle extended channel 3 mode.- 0 disables it and 1 enables it.
- only in extended channel 3 system.
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.