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. | |||||