ABC COMPUTER COMPANY, LTD.
A3866
| Processor | 80386DX | 
| Processor Speed | 33/40MHz | 
| Chip Set | OPTI | 
| Max. Onboard DRAM | 20MB | 
| Cache | 64/128/256KB | 
| BIOS | AMI | 
| Dimensions | 330mm x 218mm | 
| I/O Options | 32-bit external memory card slot | 
| NPU Options | 80387/3167 | 
 
| CONNECTIONS | |||
| Purpose | Location | Purpose | Location | 
| External battery | J10 | 32-bit external memory card | S1 | 
| Power LED & keylock | J23 | Reset switch | SW1 | 
| Speaker | J24 | Turbo switch | SW2 | 
| Turbo LED | JP4 | ||
| USER CONFIGURABLE SETTINGS | |||
| Function | Jumper | Position | |
| » | Monitor type select color | JP1 | Closed | 
| Monitor type select monochrome | JP1 | Open | |
| » | CMOS memory normal operation | JP2 | pins 2 & 3 closed | 
| CMOS memory clear | JP2 | pins 1 & 2 closed | |
| DRAM CONFIGURATION | ||||
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 | 
| 1MB | (4) 256K x 9 | NONE | NONE | NONE | 
| 2MB | (4) 256K x 9 | (4) 256K x 9 | NONE | NONE | 
| 4MB | (4) 1M x 9 | NONE | NONE | NONE | 
| 5MB | (4) 256K x 9 | (4) 1 M x 9 | NONE | NONE | 
| 6MB | (4) 256K x 9 | (4) 1M x 9 | NONE | NONE | 
| 8MB | (4) 1M x 9 | (4) 1M x 9 | NONE | NONE | 
| 10MB | (4) 256K x 9 | (4) 256K x 9 | (4) 1M x 9 | (4) 1M x 9 | 
| 16MB | (4) 1M x 9 | (4) 1M x 9 | (4) 1M x 9 | (4) 1M x 9 | 
| 16MB | (4) 4M x 9 | NONE | NONE | NONE | 
| 17MB | (4) 4M x 9 | (4) 256K x 9 | NONE | NONE | 
| 20MB | (4) 4M x 9 | (4) 1M x 9 | NONE | NONE | 
| 24MB | (4) 1M x 9 | (4) 1M x 9 | (4) 4M x 9 | NONE | 
| 40MB | (4) 1M x 9 | (4) 1M x 9 | (4) 4M x 9 | (4) 4M x 9 | 
| 64MB | (4) 4M x 9 | (4) 4M x 9 | (4) 4M x 9 | (4) 4M x 9 | 
| Note:Banks 2 & 3 are used when a 32-bit external memory card is installed. | ||||
| CACHE CONFIGURATION | |||
| Size | Bank 0 | Bank 1 | Tag | 
| 64KB | (4) 8K x 8 | (4) 8K x 8 | (3) 16K x 4 | 
| 128KB | (4) 32K x 8 | NONE | (3) 16K x 4 | 
| 256KB | (4) 32K x 8 | (4) 32K x 8 | (3) 16K x 4 | 
| CACHE JUMPER CONFIGURATION | |||||
| Size | JP5 | JP6 | JP7 | JP8 | JP9 | 
| 64KB | 2 & 3 | 1 & 2 | 1 & 2 | Open | 2 & 3 | 
| 128KB | 2 & 3 | 1 & 2 | 2 & 3 | Closed | 2 & 3 | 
| 256KB | 2 & 3 | 2 & 3 | 2 & 3 | Closed | 1 & 2 | 
| Note: Pins designated should be in the closed position. | |||||