UNIDENTIFIED
386XM-20/OP
| Processor | 80386SX | 
| Processor Speed | 20/25MHz | 
| Chip Set | OPTI | 
| Max. Onboard DRAM | 8MB | 
| Cache | 16/32/64KB | 
| BIOS | AMI | 
| Dimensions | 330mm x 218mm | 
| I/O Options | None | 
| NPU Options | 80387SX | 
 
| CONNECTIONS | |||
| Purpose | Location | Purpose | Location | 
| External battery | J1 | Turbo LED | JP8 | 
| Speaker | J21 | Reset switch | S2 | 
| Power LED & keylock | J22 | Turbo switch | S3 | 
| USER CONFIGURABLE SETTINGS | |||
| Function | Jumper | Position | |
| » | CMOS memory normal operation | JP1 | pins 2 & 3 closed | 
| CMOS memory clear | JP1 | pins 1 & 2 closed | |
| » | Monitor type select monochrome | JP2 | Open | 
| Monitor type select color | JP2 | Closed | |
| 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 | 
| 8MB | (4) 1M x 9 | (4) 1M x 9 | 
| CACHE CONFIGURATION | ||
| Size | Bank 0 | TAG | 
| 16KB | (4) 16K x 1 | (2) 4K x 4 | 
| 32KB | (4) 4K x 1 | (2) 4K x 4 | 
| 64KB | (4) 32K x 1 | (2) 4K x 4 | 
| CACHE JUMPER CONFIGURATION | |||||
| Size | JP3 | JP4 | JP5 | JP6 | JP7 | 
| 16KB | 1 & 2 | 1 & 2 | 1 & 2 | Open | Open | 
| 32KB | 2 & 3 | 1 & 2 | 1 & 2 | Closed | Open | 
| 64KB | 2 & 3 | 2 & 3 | 2 & 3 | Open | Closed | 
| Note: Pins designated should be in the closed position. | |||||