(TXT) View Source
# AMERICAN DIGITAL DATA ASSOCIATES
Precision 486-25
Processor 80486DX
Processor Speed 25MHz
Chip Set OPTI
Max. Onboard 32MB
DRAM
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
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|----------------------+----------+---------------+----------|
| External battery | BAT | Speaker | J25 |
|----------------------+----------+---------------+----------|
| 32-bit external | CN1 | Power LED & | J26 |
| memory card | | keylock | |
|----------------------+----------+---------------+----------|
| 32-bit external | CN2 | Reset switch | SW1 |
| cache card | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+---------+-----------|
| ยป | 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 |
+------------------------------------------------------------+
(IMG) IMG 2
+------------------------------------------------------------+
| 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. |
+------------------------------------------------------------+