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Integrated circuit 6821 PIA (Peripheral Interface Adapter) 40 pin DIP used in all Williams, Bally, Stern and other early solid state pinball machines.
Used in positions U10 & U11 on Bally/Stern pinball machine and shuffle alley MPU boards.
Suggested replacement for earlier 6820 PIA.
Reference:
6821
6820
68B21
HD63B21P
HD6321FP
EF68B21P
HD68B21P
MC68B21P
Bally E-620-29
Williams 5A-8972
Williams 5430-08972-00
Data East / Sega / Stern 100-0255-00
Motorola - MC6821P
ST Microelectronics - EF68B21P
Hitachi - HD468B21P
Fairchild Semiconductor - 68B21P
Taito 15-00004-001
