AY-3-8910

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Equivalence table
Rebadged as Found on PCB (manufacturer)
89C10 CMC
JFC 95101 Dynax, Nakanihon
KC89C72 CMC, Igrosoft, Novomatic, TAB
TT3355
WB5300 TAB
Winbond WF19054 BMC, Dyna, some gambling & 8-liner PCBs
YM2149 Yamaha

Programmable Sound Generator

Pinout

AY-3-8910
DIP40
        +---\/---+
Vss(GND)| 1    40| Vcc (+5V)
     NC | 2    39| TEST 1
AN.CH.B | 3    38| AN.CH.C
AN.CH.A | 4    37| DA0
     NC | 5    36| DA1
   IOB7 | 6    35| DA2
   IOB6 | 7    34| DA3
   IOB5 | 8    33| DA4
   IOB4 | 9    32| DA5
   IOB3 |10    31| DA6
   IOB2 |11    30| DA7
   IOB1 |12    29| BC1
   IOB0 |13    28| BC2
   IOA7 |14    27| BDIR
   IOA6 |15    26| TEST 2
   IOA5 |16    25| A8
   IOA4 |17    24| *A9
   IOA3 |18    23| *RESET
   IOA2 |19    22| CLOCK
   IOA1 |20    21| IOA0
        +--------+


AY-3-8912
DIP28
          +---\/---+
  AN.CH.C | 1    28| DA0
   TEST 1 | 2    27| DA1
Vcc (+5V) | 3    26| DA2
  AN.CH.B | 4    25| DA3
  AN.CH.A | 5    24| DA4
Vss (GND) | 6    23| DA5
     IOA7 | 7    22| DA6
     IOA6 | 8    21| DA7
     IOA5 | 9    20| BC1
     IOA4 |10    19| *BC2
     IOA3 |11    18| BDIR
     IOA2 |12    17| A8
     IOA1 |13    16| *RESET
     IOA0 |14    15| CLOCK
          +--------+

Frequency

AY-3-8910
Set reader to FREQ, put black probe to GND, red probe to 22 to measure CPU clock

AY-3-8912
Set reader to FREQ, put black probe to GND, red probe to 15 to measure CPU clock

External links

AY-3-8910 page on Wikipedia

Files