| Type | Count | Sample Chips | Function |
|---|---|---|---|
| Program ROMs | 25 | epr-21576* - epr-21579* |
Hitachi SH-4 executable code & vectors |
| Mask Data ROMs | 16 | mpr-23048 - mpr-23061 |
8 MB sprite, tile, audio samples |
| Security & Boot | 7 | 315-6146, 315-6188, boot_rom |
Custom Sega encryption & boot authentication |
| NVRAM / EEPROM | 3 | 25lc040.ic13s |
Game settings, bookkeeping, soft DIPs |