PCB Information
| ROM Chip ID | Region | Known Man. Dates | PCB Type | CIC | SRAM | Decoder/ Logic Circuit | Special Chips |
|---|---|---|---|---|---|---|---|
| SPAL-AF2P-0 (front) | PAL | 9612 | SHVC-1J3M-20 | D413B | 64k | MAD-1 | - |
| Prototype (front) | USA | - | SHVC-8PV5B-01 | D411A | 16,64 or 256k | 74LS157N (?) | - |
| SNS-AF2E-0 (front) | USA | 9544 | SHVC-1J3M-20 | D411B | 64k | MAD-1 | - |
| SNS-AF2E-0 (front) | USA | 9632 | SHVC-1J3M-20 | D411B | 64k | MAD-1A | - |
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