UNIDENTIFIED
386DX NON-CACHE MAINBOARD (PQFP)
| Processor | 80386DX | 
| Processor Speed | 25/33/40MHz | 
| Chip Set | Unidentified | 
| Video Chip Set | None | 
| Maximum Onboard Memory | 64MB (32MB on external memory cards) | 
| Maximum Video Memory | None | 
| Cache | None | 
| BIOS | AMI | 
| Dimensions | 254mm x 218mm | 
| I/O Options | External memory cards (2) | 
| NPU Options | 80387DX/3167 | 
 
| CONNECTIONS | |||
| Purpose | Location | Purpose | Location | 
| External battery | JP2 | Turbo switch | JP10 | 
| Speaker | JP7 | Turbo LED | JP11 | 
| Power LED & keylock | JP8 | External memory card | SL1 & SL2 | 
| Reset switch | JP9 | ||
| USER CONFIGURABLE SETTINGS | |||
| Function | Label | Position | |
| » | CMOS memory normal operation | JP3 | Pins 1 & 2 closed | 
| CMOS memory clear | JP3 | Pins 2 & 3 closed | |
| Monitor type select color | JP6 | Closed | |
| Monitor type select monochrome | JP6 | Open | |
| DRAM CONFIGURATION | ||
| Size | Bank 0 | Bank 1 | 
| 1MB | (4) 256K x 9 | None | 
| 2MB | (4) 256K x 9 | (4) 256K x 9 | 
| 4MB | (4) 1M x 9 | None | 
| 5MB | (4) 256K x 9 | (4) 1M x 9 | 
| 8MB | (4) 1M x 9 | (4) 1M x 9 | 
| 16MB | (4) 4M x 9 | None | 
| 20MB | (4) 1M x 9 | (4) 4M x 9 | 
| 20MB | (4) 4M x 9 | (4) 1M x 9 | 
| 32MB | (4) 4M x 9 | (4) 4M x 9 | 
| Note: The location of banks 0 & 1 are unidentified. To increase memory beyond 32MB, install external memory card(s). | ||