UNIDENTIFIED
386 LOCAL-BUS CACHE MAINBOARD
| Processor | AM386DX/80386DX/AM486DXL/CX486DLC | 
| Processor Speed | 33/40MHz | 
| Chip Set | OPTI | 
| Max. Onboard DRAM | 32MB | 
| Cache | 64/128/256KB | 
| BIOS | AMI | 
| Dimensions | 240mm x 221mm | 
| I/O Options | 32-bit VESA local bus slot | 
| NPU Options | 80387DX/CX487DLC | 
 
| CONNECTIONS | |||
| Purpose | Location | Purpose | Location | 
| External battery | J1 | Turbo switch | JP12 | 
| Power LED & keylock | J18 | 32-bit VESA local bus slot | SL1 | 
| Speaker | J19 | Reset switch | SW1 | 
| Turbo LED | JP11 | ||
| USER CONFIGURABLE SETTINGS | |||
| Function | Jumper | Position | |
| » | CMOS memory normal operation | JP3 | pins 2 & 3 closed | 
| CMOS memory clear | JP3 | pins 1 & 2 closed | |
| » | Monitor type select color | JP4 | Closed | 
| Monitor type select monochrome | JP4 | Open | |
| » | Factory configured - do not alter | JP7 | N/A | 
| » | Factory configured - do not alter | JP14 | N/A | 
| » | Factory configured - do not alter | JP15 | N/A | 
| » | Factory configured - do not alter | JP16 | N/A | 
| 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 | 
| 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 | JP6 | JP8 | JP9 | JP10 | JP17 | JP18 | 
| 64KB | Open | Open | Open | 2 & 3 | Open | Open | 
| 128KB | Closed | Closed | Open | 1 & 2 | Open | Closed | 
| 256KB | Closed | Closed | Closed | 2 & 3 | Closed | Closed | 
| Note: Pins designated should be in the closed position. | ||||||
| CPU TYPE CONFIGURATION | |||
| Type | JP1 | JP5 | JP13 | 
| AM486DX | Open | Open | Open | 
| 80386DX | Open | Open | Open | 
| AM386DXL | Open | Open | Open | 
| CX486DLC | Closed | Closed | Closed | 
| CPU SPEED CONFIGURATION | |
| Speed | JP2 | 
| 33MHz | Closed | 
| 40MHz | Open |