YM3439 generator equivalent, software-controlled sound generator.
l !'in name
1/0
vss
CHB
I0
CHA
0
Ground CHANNEL 8 DAC OUTPUT CHANNEL A DAC OUTPUT
Fund ion
10137
1+10 I !O PORT 8 MSB
!086
1+10 I IO PORT 8 bit6
1085
I+ IO IIO PORT 8 bit5
!OB-!
I+ IO I/O PORT B bit-!
1083
I+ !O I/O PORT B bit3
108.
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