| Switch | Function | Pins | Description |
|---|---|---|---|
| S1 | Monitor Type | ON OFF | * Colour Monochrome |
| S2 | BIOS Size | ON OFF | * 256K EPROM 128K EPROM |
| S3 | Speed Select | ON OFF | * 10 Mhz 5 or 8 Mhz |
| S4 | Speed Select | ON OFF | * 8 or 10 Mhz 5 Mhz |
| S5 | Floppy Address | ON OFF | * Primary 3Fh Secondary 37h |
| S6 | Reserved | OFF | |
| S7 | Reserved | ON | |
| S8 | Reserved | ON |