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# YOUNG MICRO SYSTEMS, INC.
VEGA MB-VS433S
Processor 80486SX/80486DX
Processor Speed 16/20/25/33/50MHz
Chip Set Symphony
Max. Onboard DRAM 64MB
Cache 64/256KB
BIOS AMI
Dimensions 330mm x 218mm
I/O Options None
NPU Options 4167
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------------+----------+----------------+----------|
| Speaker | P19 | Turbo LED | P22 |
|---------------------+----------+----------------+----------|
| Power LED & keylock | P20 | Turbo switch | P23 |
|---------------------+----------+----------------+----------|
| Reset switch | P21 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+--------------+------------+------------+------------|
| 1MB | (4) 256K x 9 | NONE | NONE | NONE |
|------+--------------+------------+------------+------------|
| 2MB | (4) 256K x 9 | (4) 256K x | NONE | NONE |
| | | 9 | | |
|------+--------------+------------+------------+------------|
| 3MB | (4) 256K x 9 | (4) 256K x | (4) 256K x | NONE |
| | | 9 | 9 | |
|------+--------------+------------+------------+------------|
| 4MB | (4) 256K x 9 | (4) 256K x | (4) 256K x | (4) 256K x |
| | | 9 | 9 | 9 |
|------+--------------+------------+------------+------------|
| 4MB | (4) 1M x 9 | NONE | NONE | NONE |
|------+--------------+------------+------------+------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 | NONE | NONE |
|------+--------------+------------+------------+------------|
| 9MB | (4) 256K x 9 | (4) 1M x 9 | (4) 1M x 9 | NONE |
|------+--------------+------------+------------+------------|
| 10MB | (4) 256K x 9 | (4) 256K x | (4) 1M x 9 | (4) 1M x 9 |
| | | 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 |
|------+--------------+------------+------------+------------|
| 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 |
|------------+---------------+---------------+---------------|
| 64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 8K x 8 |
|------------+---------------+---------------+---------------|
| 256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | J2 | J5 | J8 |
|--------------+---------------+--------------+--------------|
| 64KB | Open | Open | Open |
|--------------+---------------+--------------+--------------|
| 256KB | Closed | Closed | Closed |
+------------------------------------------------------------+