YM3812

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Equivalence table
Rebadged as Found on PCB (manufacturer)
5A12 Gaelco, Soft Art, SunA
6564L IGS
K-666 Barko, Comad, Subsino, Top ltd.
KS8001 YunSung, Unico
ND-414 YunSung
SM64 Deniam, Soft Art
SM64JBCK Subsino
U6612 ESD, Seibu Kaihatsu Inc, YunSung (different then the YM3012 package)
UA011 Barko, F2System
YN2212 ESD

FM Operator Type-L II (OPL II)

Pinout

DIP24
         +---\/---+
     Vss | 1    24| ØM
    *IRQ | 2    23| ØSY
     *IC | 3    22| NC
      AO | 4    21| MO
     *WR | 5    20| SH
     *RD | 6    19| NC
     *CS | 7    18| D7
      NC | 8    17| D6
      NC | 9    16| D5
      D0 |10    15| D4
      D1 |11    14| D3
     GND |12    13| D2
         +--------+

Frequency

DIP24
Set reader to FREQ, put black probe to GND, red probe to 20,23 and 24 to measure CPU clock

External links

YM3812 page on Wikipedia

Files