UNIDENTIFIED
386SX-25
| Processor | 80386SX | 
| Processor Speed | 25MHz | 
| Chip Set | Unidentified | 
| Max. Onboard DRAM | 16MB | 
| Cache | None | 
| BIOS | Unidentified | 
| Dimensions | 330mm x 218mm | 
| I/O Options | None | 
| NPU Options | 80387SX | 
 
| CONNECTIONS | |||
| Purpose | Location | Purpose | Location | 
| External battery | JP17 | Turbo switch | JP24 | 
| Speaker | JP21 | Turbo LED | JP25 | 
| Power LED & keylock | JP22 | Reset switch | JP26 | 
| USER CONFIGURABLE SETTINGS | |||
| Function | Jumper | Position | |
| » | CMOS memory normal operation | JP16 | Open | 
| CMOS memory clear | JP16 | Closed | |
| » | Monitor type select color | JP18 | Closed | 
| Monitor type select monochrome | JP18 | Open | |
| » | Floppy drive current select (24mA) | JP19 | Closed | 
| Floppy drive current select (12mA) | JP19 | Open | |
| » | Pipeline mode enabled | JP20 | Closed | 
| Pipeline mode disabled | JP20 | Open | |
| » | NPU disabled | JP23 | pins 2 & 3 closed | 
| NPU enabled | JP23 | pins 1 & 2 closed | |
| DRAM CONFIGURATION | ||||||
| Size | Bank 0 | P-0 | Bank 1 | P-1 | Bank 2 | Bank 3 | 
| 512KB | (4) 44256 | (2) 41256 | NONE | NONE | NONE | NONE | 
| 512KB | NONE | NONE | NONE | NONE | (2) 256K x 9 | NONE | 
| 1MB | (4) 44256 | (2) 41256 | (4) 44256 | (2) 41256 | NONE | NONE | 
| 1MB | NONE | NONE | NONE | NONE | (2) 256K x 9 | (2) 256K x 9 | 
| 2MB | (4) 441000 | (2) 411000 | NONE | NONE | NONE | NONE | 
| 2MB | NONE | NONE | NONE | NONE | (2) 1M x 9 | NONE | 
| 4MB | (4) 441000 | (2) 411000 | (4) 441000 | (2) 411000 | NONE | NONE | 
| 4MB | NONE | NONE | NONE | NONE | (2) 1M x 9 | (2) 1M x 9 | 
| 8MB | NONE | NONE | NONE | NONE | (2) 4M x 9 | NONE | 
| 16MB | NONE | NONE | NONE | NONE | (2) 4M x 9 | (2) 4M x 9 |