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 command name 
 command 
 parameters 
 Mixer parameter change 
(SPC)
 88h 
 [Switch mixer parameters] 
P1 effect output channel (0-17)
P2 bit7-5 effect output level 8 steps (0-7)
bit4-0 effect output PAN 32 steps (0- 31)
 Hard check 
(---)
 89h 
 [Hard check] 
P1 check item 00h: DRAM 4Mbit read / write
01h: DRAM 8Mbit read / write
02h: SCSP MIDI
03h: Sound source output (L / R)
04h: Sound source output (L)
05h: Sound source output (R)
 PCM parameter change 
(-P-)
 8Ah 
 [Parameter change for PCM stream playback] 
P1 PCM stream playback number (0-7)
P2 bit7-5 Direct sound output level 8 steps (0-7)
bit4-0 Direct sound Output PAN 32 steps (0-31)
P3-P4 pitch word (0000h-FFFFh)
P5 bit7-3 Effect input channel (0-15) [P5 = Rch]
bit2-0 Effect input Level 8 levels (0-7)
P6 bit7-3 Effect input channel (0-15) [P6 = Lch]
bit2-0 Effect input level 8 levels (0-7)
P7 Total level 256 levels (max: 00h-FFh: min)


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