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# UNIDENTIFIED
S486V
Processor 80486SX/80487SX/80486DX/80486DX2
Processor 20/25/33/40/50(internal)/50/66(internal)/80(internal)MHz
Speed
Chip Set SIS
Max. 32MB
Onboard
DRAM
Cache 64/128/256KB
BIOS Unidentified
Dimensions 254mm x 218mm
I/O 32-bit VESA local bus slots (3)
Options
NPU None
Options
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------+----------+----------------------+----------|
| Speaker | JP13 | External battery | JP22 |
|---------------+----------+----------------------+----------|
| Turbo LED | JP14 | Reset switch | JP24 |
|---------------+----------+----------------------+----------|
| Turbo switch | JP15 | 32-bit VESA local | SL1 - |
| | | bus slots | SL3 |
|---------------+----------+----------------------+----------|
| Power LED & | JP19 | | |
| keylock | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|------------------------------------+--------+--------------|
| | Monitor type select color | JP20 | Closed |
|---+--------------------------------+--------+--------------|
| | Monitor type select monochrome | JP20 | Open |
|---+--------------------------------+--------+--------------|
| ยป | CMOS memory normal operation | JP21 | pins 1 & 2 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| | CMOS memory clear | JP21 | pins 2 & 3 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 1MB | (1) 256K x 36 | NONE |
|------------------+--------------------+--------------------|
| 2MB | (1) 256K x 36 | (1) 256K x 36 |
|------------------+--------------------+--------------------|
| 2MB | (1) 512K x 36 | NONE |
|------------------+--------------------+--------------------|
| 4MB | (1) 512K x 36 | (1) 512K x 36 |
|------------------+--------------------+--------------------|
| 4MB | (1) 1M x 36 | NONE |
|------------------+--------------------+--------------------|
| 6MB | (1) 512K x 36 | (1) 1M x 36 |
|------------------+--------------------+--------------------|
| 8MB | (1) 1M x 36 | (1) 1M x 36 |
|------------------+--------------------+--------------------|
| 8MB | (1) 2M x 36 | NONE |
|------------------+--------------------+--------------------|
| 16MB | (1) 2M x 36 | (1) 2M x 36 |
|------------------+--------------------+--------------------|
| 16MB | (1) 4M x 36 | NONE |
|------------------+--------------------+--------------------|
| 18MB | (1) 512K x 36 | (1) 4M x 36 |
|------------------+--------------------+--------------------|
| 20MB | (1) 1M x 36 | (1) 4M x 36 |
|------------------+--------------------+--------------------|
| 32MB | (1) 4M x 36 | (1) 4M x 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG (U11) | TAG (U60) |
|-------+-------------+------------+------------+------------|
| 64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 8K x 8 | (1) 8K x 8 |
|-------+-------------+------------+------------+------------|
| 128KB | (4) 32K x 8 | NONE | (1) 32K x | (1) 8K x 8 |
| | | | 8 | |
|-------+-------------+------------+------------+------------|
| 256KB | (4) 32K x 8 | (4) 32K x | (1) 32K x | (1) 32K x |
| | | 8 | 8 | 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP8 | JP9 | JP10 | JP11 | JP12 | JP61 | JP86 |
|-------+------+------+-------+-------+-------+-------+------|
| 64KB | 2 & | 2 & | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & |
| | 3 | 3 | | | | | 3 |
|-------+------+------+-------+-------+-------+-------+------|
| 128KB | 2 & | 1 & | 1 & 2 | 1 & 2 | 2 & 3 | 1 & 2 | 2 & |
| | 3 | 2 | | | | | 3 |
|-------+------+------+-------+-------+-------+-------+------|
| 256KB | 1 & | 1 & | 2 & 3 | Open | 1 & 2 | 1 & 2 | 1 & |
| | 2 | 2 | | | | | 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP2 | JP3 | JP4 |
|-----------+--------+-------------------+-------------------|
| 80486SX | Open | pins 2 & 3 closed | Open |
|-----------+--------+-------------------+-------------------|
| 80487SX | Closed | pins 1 & 2 closed | pins 2 & 3 closed |
|-----------+--------+-------------------+-------------------|
| 80486DX | Closed | pins 1 & 2 closed | pins 1 & 2 closed |
|-----------+--------+-------------------+-------------------|
| 80486DX2 | Closed | pins 1 & 2 closed | pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP16 | JP17 | JP18 |
|---------------+--------------+--------------+--------------|
| 20MHz | Open | Open | Open |
|---------------+--------------+--------------+--------------|
| 25MHz | Closed | Open | Open |
|---------------+--------------+--------------+--------------|
| 33MHz | Closed | Closed | Closed |
|---------------+--------------+--------------+--------------|
| 40MHz | Closed | Closed | Open |
|---------------+--------------+--------------+--------------|
| 50MHz | Open | Open | Closed |
|---------------+--------------+--------------+--------------|
| 50iMHz | Closed | Open | Open |
|---------------+--------------+--------------+--------------|
| 66iMHz | Closed | Open | Closed |
|---------------+--------------+--------------+--------------|
| 80iMHz | Open | Closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VL BUS SPEED CONFIGURATION |
|------------------------------------------------------------|
| CPU speed | JP25 | JP26 |
|------------------+--------------------+--------------------|
| <= 33MHz | pins 1 & 2 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| > 33MHz | pins 2 & 3 closed | pins 2 & 3 closed |
+------------------------------------------------------------+