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# SILICON VALLEY TECHNOLOGY
486DX-33
Processor 80486SX/80487SX/80486DX
Processor Speed 20/25/33MHz
Chip Set UMC
Max. Onboard DRAM 32MB
Cache 32/64/128/256KB
BIOS AMI
Dimensions 330mm x 218mm
I/O Options None
NPU Options 4167
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------------+----------+----------------+----------|
| External battery | J1 | Turbo LED | J4 |
|---------------------+----------+----------------+----------|
| Power LED & keylock | J2 | Turbo switch | J5 |
|---------------------+----------+----------------+----------|
| Speaker | J3 | Reset switch | J6 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|------------------------------------+--------+--------------|
| » | CMOS memory normal operation | J9 | pins 1 & 2 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| | CMOS memory clear | J9 | pins 2 & 3 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| » | Monitor type select color | W8 | Closed |
|---+--------------------------------+--------+--------------|
| | Monitor type select monochrome | W8 | 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 |
|------------------+--------------------+--------------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 16MB | (4) 4M x 9 | NONE |
|------------------+--------------------+--------------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG |
|------------+---------------+---------------+---------------|
| 32KB | (4) 8K x 8 | NONE | (3) 16K x 4 |
|------------+---------------+---------------+---------------|
| 64KB | (4) 8K x 8 | (4) 8K x 8 | (3) 16K x 4 |
|------------+---------------+---------------+---------------|
| 128KB | (4) 32K x 8 | NONE | (3) 16K x 4 |
|------------+---------------+---------------+---------------|
| 256KB | (4) 32K x 8 | (4) 32K x 8 | (3) 16K x 4 |
|------------------------------------------------------------|
| Bank 0 = U2, U6, U10 & U14, Bank 1 = U3, U7, U11 & U15. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | W1 | W2 | W3 | W4 | W5 |
|----------+----------+----------+---------+--------+--------|
| 32KB | 2 & 3 | 1 & 2 | 1 & 2 | 2 & 3 | 1 & 2 |
|----------+----------+----------+---------+--------+--------|
| 64KB | 2 & 3 | 1 & 2 | 1 & 2 | 1 & 2 | 2 & 3 |
|----------+----------+----------+---------+--------+--------|
| 128KB | 2 & 3 | 1 & 2 | 2 & 3 | 2 & 3 | 2 & 3 |
|----------+----------+----------+---------+--------+--------|
| 256KB | 2 & 3 | 2 & 3 | 2 & 3 | 1 & 2 | 2 & 3 |
|------------------------------------------------------------|
| Note:Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | W12 | W13 | W14 | W16 | W17 |
|----------+----------+----------+---------+---------+-------|
| 80486SX | Open | Open | 2 & 3 | Closed | Open |
|----------+----------+----------+---------+---------+-------|
| 80487SX | Closed | Closed | 1 & 2 | Closed | 2 & 3 |
|----------+----------+----------+---------+---------+-------|
| 80486DX | Closed | Closed | 1 & 2 | Closed | 1 & 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+