UNIDENTIFIED
386 CACHE MAINBOARD
| Processor | 80386DX | 
| Processor Speed | 33/40MHz | 
| Chip Set | Unidentified | 
| Max. Onboard DRAM | 32MB | 
| Cache | 64/128/256KB | 
| BIOS | AMI | 
| Dimensions | 330mm x 218mm | 
| I/O Options | None | 
| NPU Options | 80387DX/3167 | 
 
| CONNECTIONS | |||
| Purpose | Location | Purpose | Location | 
| Power LED & keylock | J17 | External battery | J20 | 
| Speaker | J18 | Turbo switch | J21 | 
| Reset switch | J19 | Turbo LED | J22 | 
| USER CONFIGURABLE SETTINGS | |||
| Function | Jumper | Position | |
| » | Monitor type select monochrome | JP3 | Open | 
| Monitor type select color | JP3 | Closed | |
| » | CMOS memory normal operation | JP5 | pins 1 & 2 closed | 
| CMOS memory clear | JP5 | pins 2 & 3 closed | |
| » | Factory configured - do not alter | 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 | 
| 8MB | (4) 1M x 9 | (4) 1M x 9 | 
| 16MB | (4) 4M x 9 | NONE | 
| 20MB | (4) 1M x 9 | (4) 4M x 9 | 
| 32MB | (4) 4M x 9 | (4) 4M x 9 | 
| CACHE CONFIGURATION | |||
| Size | Bank 0 | Bank 1 | TAG | 
| 64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 8K x 8 | 
| 128KB | (4) 32K x 8 | NONE | (1) 8K x 8 | 
| 256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 32K x 8 | 
| CACHE JUMPER CONFIGURATION | |||||
| Size | J2 | J3 | J4 | J5 | J6 | 
| 64KB | 1 & 2 | 1 & 2 | 2 & 3 | 2 & 3 | 1 & 2 | 
| 128KB | 2 & 3 | 1 & 2 | 1 & 2 | 1 & 2 | 2 & 3 | 
| 256KB | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 
| Note: Pins designated should be in the closed position. | |||||
| CPU SPEED CONFIGURATION | |||
| Speed | JP24 | JP25 | JP26 | 
| 33MHz | Closed | Closed | Open | 
| 40MHz | Open | Open | Closed |