PCB Information
| ROM Chip ID | Region | Known Man. Dates | PCB Type | CIC | SRAM | Decoder/ Logic Circuit | Special Chips |
|---|---|---|---|---|---|---|---|
| SPAL-4Q-0 (front) | PAL | 9445 | SHVC-1A3M-21 | D413A | 64k | MAD-1 | - |
| SPAL-4Q-0 (front) | PAL | 9446 | SHVC-1A3M-21 | D413A | 64k | MAD-1 | - |
| SPAL-4Q-0 (front) (back) | PAL | 9450 | SHVC-1A3M-30 | D413A | 64k | MAD-1 | - |
| SNS-4Q-0 (front) | USA | 9435 | SHVC-1A3M-21 | D411A | 64k | MAD-1 | - |
| SNS-4Q-0 (front) | USA | 9436 | SHVC-1A3M-21 | D411A | 64k | MAD-1 | - |
| SNS-4Q-0 (front) | USA | 9438 | SHVC-1A3M-30 | D411A | 64k | MAD-1 | - |
| SNS-4Q-0 (front) (back) | USA | 9817 | SHVC-1A3M-30 | D411B | 64k | MAD-1A | - |
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