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# ASUS COMPUTER INTERNATIONAL
80486DX-3350
Processor 80486SX/80487SX/80486DX
Processor Speed 33/50MHz
Chip Set Symphony
Max. Onboard DRAM 64MB
Cache 64/128/256KB
BIOS AMI/Award
Dimensions 330mm x 218mm
I/O Options None
NPU Options 4167
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| External battery | J1 | Reset switch | J4 |
|------------------+----------+-------------------+----------|
| Turbo LED | J2 | Speaker | J5 |
|------------------+----------+-------------------+----------|
| Turbo switch | J3 | Power LED & | J6 |
| | | keylock | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Cache read wait states select | J9 | Open |
| | 2-1-1-1 (33MHz CPU) | | |
|---+----------------------------------+--------+------------|
| | Cache read wait states select | J9 | pins 1 & 2 |
| | 3-2-2-2 (50MHz CPU) | | closed |
|---+----------------------------------+--------+------------|
| » | Cache write wait states select 0 | J9 | pins 3 & 4 |
| | (33MHz CPU) | | closed |
|---+----------------------------------+--------+------------|
| | Cache write wait states select 1 | J9 | Open |
| | (50MHz CPU) | | |
|---+----------------------------------+--------+------------|
| » | Monitor type select color | J10 | Closed |
|---+----------------------------------+--------+------------|
| | Monitor type select monochrome | J10 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 1MB | (4) 256K x | NONE | NONE | NONE |
| | 9 | | | |
|------+-------------+-------------+------------+------------|
| 2MB | (4) 256K x | (4) 256K x | NONE | NONE |
| | 9 | 9 | | |
|------+-------------+-------------+------------+------------|
| 3MB | (4) 256K x | (4) 256K x | (4) 256K x | NONE |
| | 9 | 9 | 9 | |
|------+-------------+-------------+------------+------------|
| 4MB | (4) 256K x | (4) 256K x | (4) 256K x | (4) 256K x |
| | 9 | 9 | 9 | 9 |
|------+-------------+-------------+------------+------------|
| 4MB | (4) 1M x 9 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 5MB | (4) 1M x 9 | (4) 256K x | NONE | NONE |
| | | 9 | | |
|------+-------------+-------------+------------+------------|
| 6MB | (4) 1M x 9 | (4) 256K x | (4) 256K x | NONE |
| | | 9 | 9 | |
|------+-------------+-------------+------------+------------|
| 7MB | (4) 1M x 9 | (4) 256K x | (4) 256K x | (4) 256K x |
| | | 9 | 9 | 9 |
|------+-------------+-------------+------------+------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 9MB | (4) 1M x 9 | (4) 1M x 9 | (4) 256K x | NONE |
| | | | 9 | |
|------+-------------+-------------+------------+------------|
| 10MB | (4) 1M x 9 | (4) 1M x 9 | (4) 256K x | (4) 256K x |
| | | | 9 | 9 |
|------+-------------+-------------+------------+------------|
| 12MB | (4) 1M x 9 | (4) 1M x 9 | (4) 1M x 9 | NONE |
|------+-------------+-------------+------------+------------|
| 13MB | (4) 1M x 9 | (4) 1M x 9 | (4) 1M x 9 | (4) 256K x |
| | | | | 9 |
|------+-------------+-------------+------------+------------|
| 16MB | (4) 1M x 9 | (4) 1M x 9 | (4) 1M x 9 | (4) 1M x 9 |
|------+-------------+-------------+------------+------------|
| 16MB | (4) 4M x 9 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 17MB | (4) 4M x 9 | (4) 256K x | NONE | NONE |
| | | 9 | | |
|------+-------------+-------------+------------+------------|
| 18MB | (4) 4M x 9 | (4) 256K x | (4) 256K x | NONE |
| | | 9 | 9 | |
|------+-------------+-------------+------------+------------|
| 19MB | (4) 4M x 9 | (4) 256K x | (4) 256K x | (4) 256K x |
| | | 9 | 9 | 9 |
|------+-------------+-------------+------------+------------|
| 20MB | (4) 4M x 9 | (4) 1M x 9 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 21MB | (4) 4M x 9 | (4) 1M x 9 | (4) 256K x | NONE |
| | | | 9 | |
|------+-------------+-------------+------------+------------|
| 22MB | (4) 4M x 9 | (4) 1M x 9 | (4) 256K x | (4) 256K x |
| | | | 9 | 9 |
|------+-------------+-------------+------------+------------|
| 24MB | (4) 4M x 9 | (4) 1M x 9 | (4) 1M x 9 | NONE |
|------+-------------+-------------+------------+------------|
| 25MB | (4) 4M x 9 | (4) 1M x 9 | (4) 1M x 9 | (4) 256K x |
| | | | | 9 |
|------+-------------+-------------+------------+------------|
| 28MB | (4) 4M x 9 | (4) 1M x 9 | (4) 1M x 9 | (4) 1M x 9 |
|------+-------------+-------------+------------+------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 33MB | (4) 4M x 9 | (4) 4M x 9 | (4) 256K x | NONE |
| | | | 9 | |
|------+-------------+-------------+------------+------------|
| 34MB | (4) 4M x 9 | (4) 4M x 9 | (4) 256K x | (4) 256K x |
| | | | 9 | 9 |
|------+-------------+-------------+------------+------------|
| 36MB | (4) 4M x 9 | (4) 4M x 9 | (4) 1M x 9 | NONE |
|------+-------------+-------------+------------+------------|
| 37MB | (4) 4M x 9 | (4) 4M x 9 | (4) 1M x 9 | (4) 256K x |
| | | | | 9 |
|------+-------------+-------------+------------+------------|
| 40MB | (4) 4M x 9 | (4) 4M x 9 | (4) 1M x 9 | (4) 1M x 9 |
|------+-------------+-------------+------------+------------|
| 48MB | (4) 4M x 9 | (4) 4M x 9 | (4) 4M x 9 | NONE |
|------+-------------+-------------+------------+------------|
| 49MB | (4) 4M x 9 | (4) 4M x 9 | (4) 4M x 9 | (4) 256K x |
| | | | | 9 |
|------+-------------+-------------+------------+------------|
| 52MB | (4) 4M x 9 | (4) 4M x 9 | (4) 4M x 9 | (4) 1M x 9 |
|------+-------------+-------------+------------+------------|
| 64MB | (4) 4M x 9 | (4) 4M x 9 | (4) 4M x 9 | (4) 4M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG |
|------------+---------------+---------------+---------------|
| 64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 8K x 8 |
|------------+---------------+---------------+---------------|
| 128KB | (4) 32K x 8 | NONE | (1) 8K x 8 |
|------------+---------------+---------------+---------------|
| 256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JS1 | JS2 | JS3 | JS4 | JS5 | JS6 | JS7 |
|-------+-------+-------+-------+-------+------+------+------|
| 64KB | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & | 1 & | 1 & |
| | | | | | 2 | 2 | 2 |
|-------+-------+-------+-------+-------+------+------+------|
| 128KB | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & | 2 & | 1 & |
| | | | | | 3 | 3 | 2 |
|-------+-------+-------+-------+-------+------+------+------|
| 256KB | 1 & 2 | 1 & 2 | 1 & 2 | 2 & 3 | 2 & | 2 & | 2 & |
| | | | | | 3 | 3 | 3 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | J8 |
|----------------------------+-------------------------------|
| 80486SX | pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 80487SX | pins 2 & 3 closed |
|----------------------------+-------------------------------|
| 80486DX | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | J7 | J9 |
|------------------+--------------------+--------------------|
| 33MHz | pins 1 & 2 closed | Open |
|------------------+--------------------+--------------------|
| 50MHz | pins 2 & 3 closed | pins 5 & 6 closed |
+------------------------------------------------------------+