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. |