AUSTIN COMPUTER SYSTEMS
486/SLC 25
| Processor | 80386SX/CX486SLC | 
| Processor Speed | 25MHz | 
| Chip Set | C & T | 
| Max. Onboard DRAM | 16MB | 
| Cache | None | 
| BIOS | AMI | 
| Dimensions | 220mm x 220mm | 
| I/O Options | 16-bit external cache memory card slot | 
| NPU Options | 80387SX | 
 
| CONNECTIONS | |||
| Purpose | Location | Purpose | Location | 
| Speaker | J1 | External battery | J13 | 
| Turbo switch | J7 | Reset switch | J14 | 
| Turbo LED | J8 | 16-bit external cache memory card | S1 | 
| Power LED & keylock | J10 | ||
| USER CONFIGURABLE SETTINGS | |||
| Function | Jumper | Position | |
| » | CPU speed select forced high | J7 | pins 1 & 2 closed | 
| » | Monitor type select color | J12 | pins 1 & 2 closed | 
| Monitor type select monochrome | J12 | pins 2 & 3 closed | |
| » | CMOS memory normal operation | J15 | pins 2 & 3 closed | 
| CMOS memory clear | J15 | pins 1 & 2 closed | |
| » | Cache card absent | W1 | pins 2 & 3 closed | 
| Cache card present | W1 | pins 1 & 2 closed | |
| DRAM CONFIGURATION | ||||
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 | 
| 1MB | (2) 256K x 9 | (2) 256K x 9 | NONE | NONE | 
| 2MB | (2) 256K x 9 | (2) 256K x 9 | (2) 256K x 9 | (2) 256K x 9 | 
| 2MB | (2) 1M x 9 | NONE | NONE | NONE | 
| 3MB | (2) 256K x 9 | (2) 256K x 9 | (2) 1M x 9 | NONE | 
| 4MB | (2) 1M x 9 | (2) 1M x 9 | NONE | NONE | 
| 5MB | (2) 256K x 9 | (2) 256K x 9 | (2) 1M x 9 | (2) 1M x 9 | 
| 6MB | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 | NONE | 
| 8MB | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 | 
| 9MB | (2) 256K x 9 | (2) 256K x 9 | (2) 4M x 9 | NONE | 
| 10MB | (2) 1M x 9 | (2) 4M x 9 | NONE | NONE | 
| 12MB | (2) 1M x 9 | (2) 1M x 9 | (2) 4M x 9 | NONE | 
| 16MB | (2) 4M x 9 | (2) 4M x 9 | NONE | NONE | 
| CACHE JUMPER CONFIGURATION FOR CACHE CARD | |||||
| Size | J2 | J3 | J4 | J5 | J6 | 
| 64KB/2-Way Set Associative | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 
| 64KB/Directly Mapped | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 
| Note: Pins designated should be in the closed position. | |||||