UNIDENTIFIED
ALI 386SX MAINBOARD
| Processor | 80386SX/CX486SLC | 
| Processor Speed | 16/20/25/33MHz | 
| Chip Set | None | 
| Max. Onboard DRAM | 16MB | 
| SRAM Cache | None | 
| BIOS | AMI | 
| Dimensions | 216mm x 170mm | 
| I/O Options | None | 
| NPU Options | 80387SX | 
 
| CONNECTIONS | |||
| Purpose | Location | Purpose | Location | 
| External battery | J4 | Turbo switch & LED | J8 | 
| Reset switch | J6 | Power LED & keylock | J9 | 
| Speaker | J7 | ||
| USER CONFIGURABLE SETTINGS | |||
| Function | Jumper | Position | |
| » | ADS signal delay disabled | J5 | pins 2 & 3 closed | 
| ADS signal delay enabled | J5 | pins 1 & 2 closed | |
| » | NPU mode select synchronous with CPU | JP2 | pins 1 & 2 closed | 
| NPU mode select asynchronous | JP2 | pins 2 & 3 closed | |
| » | RTC type select 146816 | JP3 | open | 
| RTC type select DS1287 | JP3 | closed | |
| » | Monitor type select monochrome | JP4 | open | 
| Monitor type select color | JP4 | closed | |
| » | Parity check enabled | JP6 | open | 
| Parity check disabled | JP6 | closed | |
| BUS CLOCK CONFIGURATION | ||
| CPU Speed | JP1 | JP5 | 
| 33MHz | pins 2 & 3 closed | pins 2 & 3 closed | 
| 25MHz | pins 1 & 2 closed | pins 1 & 2 closed | 
| 20MHz | pins 2 & 3 closed | pins 1 & 2 closed | 
| 16MHz | pins 1 & 2 closed | pins 1 & 2 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 |