| USER_IO | DE10 | DB9 | FPGA | USB3 |
|---|---|---|---|---|
| 8 | 4 GND | |||
| 5 | 1 5V | |||
| 0 | Arduino_IO15 | 7 | AG11 | 3 D+ |
| 1 | Arduino_IO14 | 3 | AH9 | 2 D- |
| 2 | Arduino_IO13 | 4 | AH12 | 8 TX- |
| 3 | Arduino_IO12 | 6 | AH11 | 7 GND_D |
| 4 | Arduino_IO11 | shield | AG16 | 6 RX+ |
| 5 | Arduino_IO10 | 1 | AF15 | 5 RX- |
| 6 | Arduino_IO8 | 9 | AF17 | 9 TX+ |
| Arduino_IO9 | 2 | AE15 |
9 TX+ is AF17 on SNAC+, with regular SNAC is 3.3V
| Genesis | SNES Option 1 |
|---|---|
| A | Y |
| B | B |
| C | A |
| X | L |
| Y | X |
| Z | R |
| START | START |
| MODE | SELECT |
| Genesis | SNES Option 2 |
|---|---|
| A | B |
| B | A |
| C | R |
| X | Y |
| Y | X |
| Z | L |
| START | START |
| MODE | SELECT |
| Genesis | GBA Option 1 |
|---|---|
| A | B |
| B | A |
| C | R |
| X | FAST FORWARD |
| Y | REWIND |
| Z | L |
| START | START |
| MODE | SELECT |
| Genesis | GBA Option 2 |
|---|---|
| A | B |
| B | A |
| C | R |
| X | FAST FORWARD |
| Y | L |
| Z | REWIND |
| START | START |
| MODE | SELECT |
| Genesis | Neo Geo |
|---|---|
| A | A |
| B | B |
| C | C |
| X | SELECT |
| Y | ABC |
| Z | D |
| START | START |
| MODE | COIN |
| Genesis | NES |
|---|---|
| B | A |
| C | B |
| START | START |
| MODE | SELECT |
| Genesis | Master System |
|---|---|
| B | 1 |
| C | 2 |
| START | START/PAUSE |
| Genesis | TurboGrafx |
|---|---|
| A | III |
| B | II |
| C | I |
| X | IV |
| Y | V |
| Z | VI |
| START | RUN |
| MODE | SELECT |
| Genesis | Atari 2600 |
|---|---|
| B | A |
| START | START |
| MODE | SELECT |
| Genesis | GB/GBC |
|---|---|
| B | A |
| C | B |
| START | START |
| MODE | SELECT |
| A | SELECT |