UNIDENTIFIED
386SX-S NON CACHE MAINBOARD MODEL 1
| Processor | 80386SX | 
| Processor Speed | 16/20/25MHz | 
| Chip Set | Unidentified | 
| Max. Onboard DRAM | 16MB | 
| Cache | None | 
| BIOS | Unidentified | 
| Dimensions | 220mm x 220mm | 
| I/O Options | None | 
| NPU Options | 80387SX | 
 
| CONNECTIONS | |||
| Purpose | Location | Purpose | Location | 
| External battery | JP1 | Turbo LED | JP7 | 
| Turbo switch | JP5 | Power LED & keylock | JP8 | 
| Reset switch | JP6 | Speaker | JP9 | 
| USER CONFIGURABLE SETTINGS | |||
| Function | Jumper | Position | |
| » | Monitor type select color | JP2 | Closed | 
| Monitor type select monochrome | JP2 | Open | |
| » | NPU synchronous with CPU | JP3 | pins 1 & 2 closed | 
| NPU asynchronous with CPU | JP3 | pins 2 & 3 closed | |
| » | Pipeline mode disabled | JP4 | pins 1 & 2 closed | 
| Pipeline mode enabled | JP4 | pins 2 & 3 closed | |
| DRAM CONFIGURATION | ||
| Size | Bank 0 | Bank 1 | 
| 512KB | (2) 256K x 9 | NONE | 
| 1MB | (2) 256K x 9 | (2) 256K x 9 | 
| 2MB | (2) 1M x 9 | NONE | 
| 4MB | (2) 1M x 9 | (2) 1M x 9 | 
| 8MB | (2) 4M x 9 | NONE | 
| 16MB | (2) 4M x 9 | (2) 4M x 9 |