| Switch | Function when Open |
| 1 | Axis 0 count step pulses |
| 2 | Axis 1 count step pulses |
| 3 | Axis 2 count step pulses |
| 4 | Axis 3 count step pulses |
| 5 | Axis 0 Phase Output |
| 6 | Axis 1 Phase Output |
| 7 | Axis 2 Phase Output |
| 8 | Axis 3 Phase Output |
| 9 | Mariss mode |
| 10 | Address bit 5 |
| The first 4 switches control whether each axis has feedback by external encoder (when switch is closed) or counts step pulses from that axis' rate generator (when switch is open). |
| The next 4 switches (5..8) select whether each axis will produce step pulses (when closed) or full-step phase signals (when open). |
| Switch 9 changes the timing relationship of the direction bits on all 4 axes. When closed, the direction bit changes whenever the corresponding bit in the rate generator control register is changed, as modified by the setup time register. When open, the direction changes only at the beginning of a step pulse, to conform with the needs of the Gecko drives. |
| 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. |