Serial interface
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The Dreamcast has a serial interface on the back of the console used for several peripherals and for console debugging.
| Pin | Description |
|---|---|
| 1 | +5V |
| 2 | ? |
| 3 | Ground |
| 4 | RX2 |
| 5 | TX2 |
| 6 | RTS |
| 7 | CTS |
| 8 | ? |
| 9 | ? |
| 10 | +3.3V |
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