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# UNIDENTIFIED
486VL.I
Processor 80486SX/80487SX/80487SX2/80486DX/80486DX2/Pentium
Overdrive
Processor 20/25/33/40/50(internal)/50/66(internal)MHz
Speed
Chip Set SIS
Max. Onboard 32MB
DRAM
Cache 64/128/256KB
BIOS AMI
Dimensions 254mm x 218mm
I/O Options 32-bit VESA local bus slots (2)
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| External battery | JP1 | Speaker | JP17 |
|------------------+----------+-------------------+----------|
| Reset switch | JP14 | Power LED & | JP18 |
| | | keylock | |
|------------------+----------+-------------------+----------|
| Turbo switch | JP15 | 32-bit VESA local | SL1 & |
| | | bus slots | SL2 |
|------------------+----------+-------------------+----------|
| Turbo LED | JP16 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|---------------------------------------+---------+----------|
| » | Factory configured - do not alter | J1 | N/A |
|---+-----------------------------------+---------+----------|
| » | Factory configured - do not alter | JP2 | N/A |
|---+-----------------------------------+---------+----------|
| » | Factory configured - do not alter | JP11 | N/A |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 |
|------------------+--------------------+--------------------|
| 20MB | (4) 1M x 9 | (4) 4M x 9 |
|------------------+--------------------+--------------------|
| 32MB | (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 |
|------------+---------------+---------------+---------------|
| 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 | JP12 | JP13 |
|-------------------+-------------------+--------------------|
| 64KB | Open | Open |
|-------------------+-------------------+--------------------|
| 128KB | Closed | pins 1 & 2 closed |
|-------------------+-------------------+--------------------|
| 256KB | Closed | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP9 | JP10 | JP22 | JP23 |
|------------+----------------+------------+--------+--------|
| 80486SX | pins 1 & 2, 3 | pins 1 & 2 | Closed | Open |
| (PQFP) | & 4 closed | closed | | |
|------------+----------------+------------+--------+--------|
| 80486SX | pins 2 & 3 | Open | Open | Closed |
| | closed | | | |
|------------+----------------+------------+--------+--------|
| 80487SX | pins 1 & 2, 3 | pins 2 & 3 | Open | Closed |
| | & 4 closed | closed | | |
|------------+----------------+------------+--------+--------|
| 80486DX | pins 1 & 2, 3 | pins 1 & 2 | Open | Closed |
| | & 4 closed | closed | | |
|------------+----------------+------------+--------+--------|
| 80486DX2 | pins 1 & 2, 3 | pins 1 & 2 | Open | Closed |
| | & 4 closed | closed | | |
|------------+----------------+------------+--------+--------|
| Pentium | pins 1 & 2, 3 | pins 2 & 3 | Open | Closed |
| Overdrive | & 4 closed | closed | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP6 | JP7 | JP8 |
|---------------+--------------+--------------+--------------|
| 20MHz | Open | Closed | Closed |
|---------------+--------------+--------------+--------------|
| 25MHz | Closed | Open | Closed |
|---------------+--------------+--------------+--------------|
| 33MHz | Closed | Closed | Open |
|---------------+--------------+--------------+--------------|
| 40MHz | Open | Open | Closed |
|---------------+--------------+--------------+--------------|
| 50iMHz | Closed | Open | Closed |
|---------------+--------------+--------------+--------------|
| 50MHz | Open | Closed | Open |
|---------------+--------------+--------------+--------------|
| 66iMHz | Closed | Closed | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VESA WAIT STATE CONFIGURATION |
|------------------------------------------------------------|
| Wait states | JP19 |
|-------------------------------+----------------------------|
| 0 wait states | Open |
|-------------------------------+----------------------------|
| 1 wait state | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BUS SPEED CONFIGURATION |
|------------------------------------------------------------|
| CPU speed | JP20 |
|-------------------------------+----------------------------|
| <= 33MHz | Open |
|-------------------------------+----------------------------|
| > 33MHz | Closed |
+------------------------------------------------------------+