Ippatsu Gyakuten (Japan)
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Display
Type: raster Horizontal
Resolution: 256 x 240
Refresh: 60 Hz
Processors
Zilog Z80 @ 4 MHz
Audio
AY-3-8910A PSG @ 1.536 MHz
Channels: 1
Controls
Players: 2
Coin slots: 3
mahjong, 26 buttons
gambling, 1 button
mahjong, 26 buttons
DIP Switch Settings
Data from MAME. On later hardware, game settings are typically in the Test/Service Menu, not DIP switches. Learn more
| Switch | Setting | Options | Default |
|---|---|---|---|
| MAIN SW:1, MAIN SW:2, MAIN SW:3, MAIN SW:4 | Payout Rate | MAIN SW:1 MAIN SW:2 MAIN SW:3 MAIN SW:4OFF OFF OFF OFF 96% ✱ON OFF OFF OFF 93%OFF ON OFF OFF 90%ON ON OFF OFF 87%OFF OFF ON OFF 84%ON OFF ON OFF 81%OFF ON ON OFF 78%ON ON ON OFF 75%OFF OFF OFF ON 71%ON OFF OFF ON 68%OFF ON OFF ON 65%ON ON OFF ON 62%OFF OFF ON ON 59%ON OFF ON ON 56%OFF ON ON ON 53%ON ON ON ON 50% | 96% |
| MAIN SW:5 | Unknown | OFF Off ✱ON On | Off |
| MAIN SW:6, MAIN SW:7 | Maximum Bet | MAIN SW:6 MAIN SW:7ON ON 1OFF ON 5ON OFF 7OFF OFF 10 ✱ | 10 |
| MAIN SW:8 | Open Reach | ON OffOFF On ✱ | On |
| SUB SW-1:1, SUB SW-1:2 | Cut | SUB SW-1:1 SUB SW-1:2ON ON OffOFF ON BaimanON OFF SanbaimanOFF OFF Yakuman ✱ | Yakuman |
| SUB SW-1:3, SUB SW-1:4 | Yakuman Payout | SUB SW-1:3 SUB SW-1:4ON ON 32OFF ON 100ON OFF 200OFF OFF 300 ✱ | 300 |
| SUB SW-1:5, SUB SW-1:6 | Double-Up Count | SUB SW-1:5 SUB SW-1:6ON ON 3OFF ON 4ON OFF 5OFF OFF 6 ✱ | 6 |
| SUB SW-1:7 | Last Chance Count | ON 3OFF 5 ✱ | 5 |
| SUB SW-1:8 | Unknown | OFF Off ✱ON On | Off |
| SUB SW-2:1 | Double Chance (1/8) | ON OffOFF On ✱ | On |
| SUB SW-2:2 | Second Bonus | ON OffOFF On ✱ | On |
| SUB SW-2:3 | Double Bet | ON OffOFF On ✱ | On |
| SUB SW-2:4, SUB SW-2:5 | Heart Chance | SUB SW-2:4 SUB SW-2:5ON ON OffOFF ON 1/8 (12.5%)ON OFF 1/4 (25%)OFF OFF 1/2 (50%) ✱ | 1/2 (50%) |
| SUB SW-2:6, SUB SW-2:7 | Payout Limit | SUB SW-2:6 SUB SW-2:7OFF OFF 300 ✱ON OFF 500OFF ON 800ON ON 1000 | 300 |
| SUB SW-2:8 | Show Payout Limit | ON OffOFF On ✱ | On |