| Switch | Function when Open |
| 1 | Unused |
| 2 | Unused |
| 3 | Unused |
| 4 | Unused |
| 5 | Unused |
| 6 | Unused |
| 7 | Unused |
| 8 | Unused |
| 9 | Unused |
| 10 | Address bit 5 |
| Switch 10 selects bit 5 of the IEEE-1284 address that this board responds to. When closed, the board responds to addresses 0..31 (decimal) (or 00..1F hex). When open, the board responds to addresses 32..63 (decimal) (or 20..3F hex). If you need more than two of these boards on the same parallel port bus, Jumpers JP2 and JP3 can be cut to control 2 more bits of addressing, allowing a total of 8 boards to operate together. |
| Jumper JP2, when cut, allows the board to respond to addresses with bit 6 high, in a manner similar to opening DIP switch 10. |
| Jumper JP3, when cut, allows the board to respond to addresses with bit 7 high, in a manner similar to opening DIP switch 10. |
| Jumper JP4 can be selected to enable or disable the watchdog timer on the board. When enabled, the watchdog will force the board into Emergency Stop mode when the rate generator registers have not been written to in 20 mS. |