PCB Information
| ROM Chip ID | Region | Known Man. Dates | PCB Type | CIC | SRAM | Decoder/ Logic Circuit | Special Chips |
|---|---|---|---|---|---|---|---|
| SPAL-4C-0 (front) | PAL | 9549,9548 | SHVC-2J0N-20 | D413B | - | SN74LS00N | - |
| SNS-4C-0 (front) | USA | 9436 | SHVC-2J0N-11 | D411A | - | SN74LS00N | - |
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