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
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