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- FOIL SIDE Rear Panel COMPONENT SIDE
- Ground B1 A1 ~I/O Check
- Reset (powerup) B2 A2 Data bit 7
- +5 V DC B3 A3 Date bit 6
- IRQ 2 B4 A4 Data bit 5
- -5 V DC B5 A5 Data bit 4
- D REQ 2 B6 A6 Data bit 3
- -12 V DC B7 A7 Data bit 2
- Reserved B8 A8 Data bit 1
- +12 V DC B9 A9 Data bit 0
- Ground B10 A10 I/O Channel Ready
- ~MEMW B11 A11 AEN
- ~MEMR B12 A12 Address bit 19
- ~IOW B13 A13 Address bit 18
- ~IOR B14 A14 Address bit 17
- ~D ACK 3 B15 A15 Address bit 16
- D REQ 3 B16 A16 Address bit 15
- ~D ACK 1 B17 A17 Address bit 14
- D REQ 1 B18 A18 Address bit 13
- ~ D ACK 0 B19 A19 Address bit 12
- Clock 4.77MHz B20 A20 Address bit 11
- IRQ 7 B21 A21 Address bit 10
- IRQ 6 B22 A22 Address bit 9
- IRQ 5 B23 A23 Address bit 8
- IRQ 4 B24 A24 Address bit 7
- IRQ 3 B25 A25 Address bit 6
- ~D ACK 2 B26 A26 Address bit 5
- T/C B27 A27 Address bit 4
- ALE B28 A28 Address bit 3
- +5 V DC B29 A29 Address bit 2
- OSC 14.31818MHz B30 A30 Address bit 1
- Ground B31 A31 Address bit 0
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- ALE Address Latch Enable
- T/C Terminal Count (DMA)
- AEN Address Enable
- MEMR/W Memory Read/Write
- IOR/W IO Read/Write