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# UNIDENTIFIED
391WB/H
Processor 80386DX/AMD80386DX
Processor Speed 33/40MHz
Chip Set OPTI
Max. Onboard DRAM 32MB
Cache 32/64/128/256KB
BIOS AMI
Dimensions 220mm x 220mm
I/O Options None
NPU Options 80387DX/3167
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| Power LED & | J1 | Reset switch | J4 |
| keylock | | | |
|-------------------+----------+------------------+----------|
| Speaker | J2 | Turbo switch | J5 |
|-------------------+----------+------------------+----------|
| Turbo LED | J3 | External battery | JP13 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+---------+-----------|
| » | Turbo mode disabled | J5 | Closed |
|---+----------------------------------+---------+-----------|
| | Turbo mode enabled | J5 | Open |
|---+----------------------------------+---------+-----------|
| » | NPU asynchronous with CPU | JP8 | Closed |
|---+----------------------------------+---------+-----------|
| | NPU synchronous with CPU | JP8 | Open |
|---+----------------------------------+---------+-----------|
| » | I/O bus speed select ATCLK/6 | JP9 | Open |
|---+----------------------------------+---------+-----------|
| | I/O bus speed select ATCLK/8 | JP9 | Closed |
|---+----------------------------------+---------+-----------|
| » | Monitor type select monochrome | JP12 | Open |
|---+----------------------------------+---------+-----------|
| | Monitor type select color | JP12 | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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) 1M x 9 |
|------------------+--------------------+--------------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 16MB | (4) 4M x 9 | NONE |
|------------------+--------------------+--------------------|
| 20MB | (4) 1M x 9 | (4) 4M x 9 |
|------------------+--------------------+--------------------|
| 20MB | (4) 4M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG |
|------------+---------------+---------------+---------------|
| 32KB | (4) 8K x 8 | NONE | (1) 8K x 8 |
|------------+---------------+---------------+---------------|
| 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 |JP1 |JP2 |JP3| JP4 | JP5 | JP6 |JP14|JP15|JP16|JP17|
|-----+----+----+---+------+------+------+----+----+----+----|
|32KB |1 & |1 & |1 &| Open | Open | Open |2 & |1 & |1 & |1 & |
| | 2 | 2 | 2 | | | | 3 | 2 | 2 | 2 |
|-----+----+----+---+------+------+------+----+----+----+----|
|64KB |1 & |1 & |2 &| Open | Open |Closed|2 & |1 & |1 & |1 & |
| | 2 | 2 | 3 | | | | 3 | 2 | 2 | 2 |
|-----+----+----+---+------+------+------+----+----+----+----|
|128KB|2 & |1 & |2 &|Closed| Open |Closed|2 & |1 & |1 & |1 & |
| | 3 | 2 | 3 | | | | 3 | 2 | 2 | 2 |
|-----+----+----+---+------+------+------+----+----+----+----|
|256KB|2 & |2 & |2 &|Closed|Closed|Closed|2 & |1 & |1 & |1 & |
| | 3 | 3 | 3 | | | | 3 | 2 | 2 | 2 |
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+