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# UNIDENTIFIED
VESA X86VLWB
Processor 80386DX/80486SX/80486DX/80486DX2
Processor Speed 25/33/40/50(internal)/66(internal)MHz
Chip Set Intel
Max. Onboard DRAM 32MB
Cache 64/128/256KB
BIOS AMI
Dimensions 330mm x 218mm
I/O Options 32-bit VESA local bus slots (2)
NPU Options 80387DX
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| External battery | J1 | Turbo LED | JP32 |
|-------------------+----------+------------------+----------|
| Power LED & | J19 | 32-bit VESA | SL1, SL2 |
| keylock | | Local bus slots | |
|-------------------+----------+------------------+----------|
| Speaker | J20 | Reset switch | SW1 |
|-------------------+----------+------------------+----------|
| Turbo switch | JP31 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | CMOS normal operation | JP1 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | CMOS memory clear | JP1 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Bus speed select - Clock/5 | JP3 | Closed |
|---+----------------------------------+--------+------------|
| | Bus speed select - Clock/4 | JP3 | Open |
|---+----------------------------------+--------+------------|
| » | Monitor type select monochrome | JP4 | Closed |
|---+----------------------------------+--------+------------|
| | Monitor type select color | JP4 | Open |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP16 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| | Enable 486SX PQFP | JP17 | Open |
|---+----------------------------------+--------+------------|
| | Disable 486SX PQFP | JP17 | Closed |
|---+----------------------------------+--------+------------|
| | Enable 386DX PQFP | JP18 | Open |
|---+----------------------------------+--------+------------|
| | Disable 386DX PQFP | JP18 | 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 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PROCESSOR TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP2 | JP6 | JP7 |
|---------------+--------------+--------------+--------------|
| Cyrix | Closed | Closed | Closed |
|---------------+--------------+--------------+--------------|
| Intel/AMD | Open | Open | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP5 | JP12 |
|-------------------+--------------------+-------------------|
| 80386 | pins 2 & 3 closed | Closed |
|-------------------+--------------------+-------------------|
| 80486 | pins 1 & 2 closed | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU CLOCK CONFIGURATION |
|------------------------------------------------------------|
| Type | Speed | JP25 | JP33 |
|-----------+--------+-------------------+-------------------|
| 80386DX | 25MHz | pins 2 & 3 closed | pins 1 & 2 closed |
|-----------+--------+-------------------+-------------------|
| 80386DX | 33MHz | pins 2 & 3 closed | pins 1 & 2 closed |
|-----------+--------+-------------------+-------------------|
| 80486SX | 25MHz | pins 2 & 3 closed | pins 2 & 3 closed |
|-----------+--------+-------------------+-------------------|
| 80486SX | 33MHz | pins 2 & 3 closed | pins 2 & 3 closed |
|-----------+--------+-------------------+-------------------|
| 80486DX | 33MHz | pins 2 & 3 closed | pins 2 & 3 closed |
|-----------+--------+-------------------+-------------------|
| 80486DX | 50MHz | pins 1 & 2 closed | pins 1 & 2 closed |
|-----------+--------+-------------------+-------------------|
| 80486DX2 | 50iMHz | pins 1 & 2 closed | pins 1 & 2 closed |
|-----------+--------+-------------------+-------------------|
| 80486DX2 | 66iMHz | pins 2 & 3 closed | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 486 PROCESSOR CONFIGURATION |
|------------------------------------------------------------|
| Type | JP35 | JP36 | JP37 |
|-----------+-------------------+--------+-------------------|
| 80486SX | pins 2 & 3 closed | Open | pins 2 & 3 closed |
|-----------+-------------------+--------+-------------------|
| 80486DX | pins 1 & 2 closed | Closed | pins 1 & 2 closed |
|-----------+-------------------+--------+-------------------|
| 80486DX2 | pins 1 & 2 closed | Closed | pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG (U39) | TAG (U40) |
|-------+-------------+------------+------------+------------|
| 64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 8K x 8 | NONE |
|-------+-------------+------------+------------+------------|
| 128KB | (4) 32K x 8 | NONE | (1) 8K x 8 | NONE |
|-------+-------------+------------+------------+------------|
| 256KB | (4) 32K x 8 | (4) 32K x | (1) 8K x 8 | (1) 8K x 8 |
| | | 8 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP10 | JP11 | JP13 | JP15 |
|---------+-------------------+----------+---------+---------|
| 64KB | pins 2 & 3 closed | Open | Open | Open |
|---------+-------------------+----------+---------+---------|
| 128KB | pins 2 & 3 closed | Closed | Closed | Open |
|---------+-------------------+----------+---------+---------|
| 256KB | pins 1 & 2 closed | Closed | Closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VESA CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| CPU Type | JP30 | JP34 |
|------------------+--------------------+--------------------|
| 80386 | pins 2 & 3 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 80486 | pins 1 & 2 closed | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VESA WAIT STATE CONFIGURATION |
|------------------------------------------------------------|
| CPU speed | Wait states | JP22 | JP26 |
|---------------+---------------+--------------+-------------|
| < 33MHz | 0 wait states | Open | Open |
|---------------+---------------+--------------+-------------|
| > 33MHz | 1 wait states | Closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MISCELLANEOUS TECHNICAL NOTES |
|------------------------------------------------------------|
| Note:The VESA bus can be disabled by removing two |
| integrated chips (IC) off the system board. |
|------------------------------------------------------------|
| To disable the VESA bus, ICs located on U29 and U38 must |
| be removed and the following |
|------------------------------------------------------------|
| jumpers must be installed: JP8, JP9, JP14, JP19, JP21, |
| JP23, JP24, JP27. |
|------------------------------------------------------------|
| To enable the VESA bus, insert two ICs at U29 and U38. And |
| all jumpers in above paragraph |
|------------------------------------------------------------|
| must be open. |
|------------------------------------------------------------|
| Some system boards may have a clock generating device |
| which must be set to generate the |
|------------------------------------------------------------|
| proper clock speed for the CPU. Jumpers JP28 and JP29 are |
| used to set the clock frequency |
|------------------------------------------------------------|
| the device should generate. In most systems, this device |
| is replaced with an oscillator. |
+------------------------------------------------------------+