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# U.S. INTEGRATED TECHNOLOGIES, INC.
486 25/33
Processor 80486DX
Processor Speed 25/33/40MHz
Chip Set Unidentified
Max. Onboard DRAM 32MB
Cache 64/256KB
BIOS AMI
Dimensions 330mm x 218mm
I/O Options 32-bit external memory card slot
NPU Options 4167
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| Speaker | JP8 | Reset switch | SW1 |
|-------------------+----------+------------------+----------|
| External battery | JP10 | 32-bit external | S2 |
| | | memory card | |
|-------------------+----------+------------------+----------|
| Power LED & | JP11 | | |
| keylock | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|-----------------------------------+--------+---------------|
| » | Monitor type select color | JP1 | Closed |
|---+-------------------------------+--------+---------------|
| | Monitor type select | JP1 | Open |
| | monochrome | | |
|---+-------------------------------+--------+---------------|
| » | Speaker type select internal | JP7 | pins 1 & 2 |
| | | | closed |
|---+-------------------------------+--------+---------------|
| | Speaker type select external | JP7 | pins 2 & 3 |
| | | | closed |
|---+-------------------------------+--------+---------------|
| » | Battery type select internal | JP9 | pins 1 & 2 |
| | | | closed |
|---+-------------------------------+--------+---------------|
| | Battery type select external | JP9 | pins 2 & 3 |
| | | | closed |
|---+-------------------------------+--------+---------------|
| » | Factory configured - do not | JP31 | Closed |
| | alter | | |
|---+-------------------------------+--------+---------------|
| » | Factory configured - do not | JP32 | Open |
| | alter | | |
|---+-------------------------------+--------+---------------|
| » | Factory configured - do not | JP33 | Closed |
| | alter | | |
|---+-------------------------------+--------+---------------|
| » | Factory configured - do not | JP34 | Closed |
| | alter | | |
|---+-------------------------------+--------+---------------|
| » | Factory configured - do not | JP35 | Closed |
| | alter | | |
|---+-------------------------------+--------+---------------|
| » | Factory configured - do not | JP36 | Closed |
| | alter | | |
|---+-------------------------------+--------+---------------|
| » | Factory configured - do not | JP37 | Closed |
| | alter | | |
|---+-------------------------------+--------+---------------|
| » | Factory configured - do not | JP39 | pins 2 & 3 |
| | alter | | closed |
|---+-------------------------------+--------+---------------|
| » | Factory configured - do not | JP40 | pins 1 & 2 |
| | alter | | closed |
|---+-------------------------------+--------+---------------|
| » | Factory configured - do not | JP41 | pins 2 & 3 |
| | alter | | closed |
|---+-------------------------------+--------+---------------|
| » | Factory configured - do not | JP45 | pins 1 & 2, 3 |
| | alter | | & 4 closed |
|---+-------------------------------+--------+---------------|
| » | Factory configured - do not | JP46 | pins 1 & 2, 3 |
| | alter | | & 4 closed |
|---+-------------------------------+--------+---------------|
| » | Factory configured - do not | JP48 | Open |
| | alter | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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) 1 M 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 CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | TAG |
|------------------+--------------------+--------------------|
| 64KB | (8) 8K x 8 | (2) 16K x 4 |
|------------------+--------------------+--------------------|
| 256KB | (8) 32K x 8 | (2) 16K x 4 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP4 | JP5 | JP6 | JP20 | JP21 |
|----------+----------+---------+--------+---------+---------|
| 64KB | Open | 2 & 3 | 2 & 3 | Open | Open |
|----------+----------+---------+--------+---------+---------|
| 256KB | Closed | 1 & 2 | 1 & 2 | Closed | Closed |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | S1/3 | S1/4 | S1/5 | S1/6 |
|------------+-----------+-----------+-----------+-----------|
| 25MHz | On | Off | Off | Off |
|------------+-----------+-----------+-----------+-----------|
| 33MHz | On | Off | Open | On |
|------------+-----------+-----------+-----------+-----------|
| 40MHz | Off | On | Off | On |
+------------------------------------------------------------+