AMERICAN DIGITAL DATA ASSOCIATES
Precision 486-25
Processor | 80486DX |
Processor Speed | 25MHz |
Chip Set | OPTI |
Max. Onboard DRAM | 32MB |
Cache | 64/128KB (on 32-bit external cache card) |
BIOS | AMI |
Dimensions | 330mm x 218mm |
I/O Options | 32-bit external memory card slot, 32-bit external cache card slot |
NPU Options | 4167 |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
External battery | BAT | Speaker | J25 |
32-bit external memory card | CN1 | Power LED & keylock | J26 |
32-bit external cache card | CN2 | Reset switch | SW1 |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
» | Monitor type select color | JP1 | Closed |
Monitor type select monochrome | JP1 | 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 |
5MB | (4) 256K x 9 | (4) 1M x 9 |
8MB | (4) 1M x 9 | (4) 1M x 9 |
16MB | (4) 4M x 9 | NONE |
17MB | (4) 256K x 9 | (4) 4M x 9 |
20MB | (4) 1M x 9 | (4) 4M x 9 |
32MB | (4) 4M x 9 | (4) 4M x 9 |
CACHE CARD CONFIGURATION | ||
Setting | JP3 | JP4 |
Disabled | Closed | Closed |
Enabled | Open | Open |
CACHE CONFIGURATION | ||
Size | Bank 0 | Bank 1 |
64KB | (8) 8K x 8 | NONE |
128KB | (8) 8K x 8 | (8) 8K x 8 |
CACHE JUMPER CONFIGURATION | |||||
Size | JP1 | JP2 | JP3 | JP4 | JP5 |
64KB | 1 & 2 | Open | Open | 1 & 2 | 1 & 2 |
128KB | 2 & 3 | Closed | Closed | 2 & 3 | 2 & 3 |
Note: Pins designated should be in the closed position. |