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# GVC TECHNOLOGIES, INC.
486-33/50
Processor 80486SX/80487SX/80486DX
Processor Speed 16/20/25/33/50MHz
Chip Set SIS
Max. Onboard DRAM 64MB
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 | Power LED & | J18 |
| | | keylock | |
|------------------+----------+-------------------+----------|
| Reset switch | J15 | Speaker | J19 |
|------------------+----------+-------------------+----------|
| Turbo switch | J17 | Turbo LED | J20 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|----------------------------------------+--------+----------|
| » | Factory configured - do not alter | J21 | N/A |
|---+------------------------------------+--------+----------|
| » | Monitor type select color | J2 | Closed |
|---+------------------------------------+--------+----------|
| | Monitor type select monochrome | J2 | 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 | | |
|------+-------------+-------------+------------+------------|
| 4MB | (4) 1M x 9 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 5MB | (4) 256K x | (4) 1 M x 9 | NONE | NONE |
| | 9 | | | |
|------+-------------+-------------+------------+------------|
| 6MB | (4) 256K x | (4) 256K x | (4) 1M x 9 | NONE |
| | 9 | 9 | | |
|------+-------------+-------------+------------+------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 9MB | (4) 256K x | (4) 1M x 9 | (4) 1M x 9 | NONE |
| | 9 | | | |
|------+-------------+-------------+------------+------------|
| 10MB | (4) 256K x | (4) 256K x | (4) 1M x 9 | (4) 1M x 9 |
| | 9 | 9 | | |
|------+-------------+-------------+------------+------------|
| 12MB | (4) 1M x 9 | (4) 1M x 9 | (4) 1M x 9 | NONE |
|------+-------------+-------------+------------+------------|
| 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 |
|------+-------------+-------------+------------+------------|
| 20MB | (4) 1M x 9 | (4) 4M x 9 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 24MB | (4) 1M x 9 | (4) 1M x 9 | (4) 4M x 9 | NONE |
|------+-------------+-------------+------------+------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 48MB | (4) 4M x 9 | (4) 4M x 9 | (4) 4M x 9 | NONE |
|------+-------------+-------------+------------+------------|
| 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 |
|------------+---------------+---------------+---------------|
| 32KB | (4) 8K x 8 | NONE | (2) 16K x 4 |
|------------+---------------+---------------+---------------|
| 64KB | (4) 8K x 8 | (4) 8K x 8 | (2) 16K x 4 |
|------------+---------------+---------------+---------------|
| 128KB | (4) 32K x 8 | NONE | (2) 16K x 4 |
|------------+---------------+---------------+---------------|
| 256KB | (4) 32K x 8 | (4) 32K x 8 | (2) 16K x 4 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | J3 | J4 | J5 | J6 | J7 | J8 | J9 | J10 | J11 |
|-------+-----+-----+-----+-----+-----+-----+----+-----+-----|
| 32KB | 1 & | 1 & | 1 & | 1 & | 1 & | 1 & | 1 | 1 & | 1 & |
| | 2 | 2 | 2 | 2 | 2 | 2 | & | 2 | 2 |
| | | | | | | | 2 | | |
|-------+-----+-----+-----+-----+-----+-----+----+-----+-----|
| 64KB | 2 & | 1 & | 2 & | 2 & | 1 & | 1 & | 2 | 1 & | 1 & |
| | 3 | 2 | 3 | 3 | 2 | 2 | & | 2 | 2 |
| | | | | | | | 3 | | |
|-------+-----+-----+-----+-----+-----+-----+----+-----+-----|
| 128KB | 2 & | 2 & | 1 & | 2 & | 2 & | 1 & | 1 | 1 & | 2 & |
| | 3 | 3 | 2 | 3 | 3 | 2 | & | 2 | 3 |
| | | | | | | | 2 | | |
|-------+-----+-----+-----+-----+-----+-----+----+-----+-----|
| 256KB | 2 & | 2 & | 2 & | 2 & | 2 & | 2 & | 2 | 2 & | 2 & |
| | 3 | 3 | 3 | 3 | 3 | 3 | & | 3 | 3 |
| | | | | | | | 3 | | |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | J12 | J13 | J14 |
|----------+-------------------+-------------------+---------|
| 80486SX | pins 2 & 3 closed | pins 2 & 3 closed | Open |
|----------+-------------------+-------------------+---------|
| 80487SX | pins 1 & 2 closed | pins 2 & 3 closed | Closed |
|----------+-------------------+-------------------+---------|
| 80486DX | pins 1 & 2 closed | pins 1 & 2 closed | Closed |
+------------------------------------------------------------+