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# ASUS COMPUTER INTERNATIONAL
VL/ISA-486SV2 VERSION 1.7
Processor 80486SX/80487SX/80486DX/ODP486SX/ 80486DX2
Processor Speed 20/25/33/40/50(internal)/50/66(internal)MHz
Chip Set SIS
Max. Onboard DRAM 32MB
Cache 64/128/256KB
BIOS AMI
Dimensions 246mm x 221mm
I/O Options 32-bit VESA local bus slots (2)
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| External battery | BCON1 | Speaker | CON4 |
|------------------+----------+-------------------+----------|
| Turbo switch | CON1 | Power LED & | CON5 |
| | | keylock | |
|------------------+----------+-------------------+----------|
| Turbo LED | CON2 | 32-bit VESA local | S1 |
| | | bus slot | |
|------------------+----------+-------------------+----------|
| Reset switch | CON3 | 32-bit VESA local | S2 |
| | | bus slot | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper/Switch | Position |
|-------------------------------+---------------+------------|
| » | CMOS memory normal | BJP1 | pins 1 & 2 |
| | operation (Internal | | closed |
| | Battery) | | |
|---+---------------------------+---------------+------------|
| | CMOS memory normal | BJP1 | pins 2 & 3 |
| | operation (External | | closed |
| | Battery) | | |
|---+---------------------------+---------------+------------|
| | CMOS memory clear | BJP1 | Open |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | JP1 | pins 2 & 3 |
| | not alter | | closed |
|---+---------------------------+---------------+------------|
| » | Monitor type select EGA, | JP2 | pins 1 & 2 |
| | Mono, VGA, or any other | | closed |
|---+---------------------------+---------------+------------|
| | Monitor type select CGA | JP2 | pins 2 & 3 |
| | | | closed |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | TP2 | Closed |
| | not alter | | |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | TP5 | Open |
| | not alter | | |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | TP13 | pins 1 & 2 |
| | not alter | | closed |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | TP14 | pins 1 & 2 |
| | not alter | | closed |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | TP15 | pins 1 & 2 |
| | not alter | | closed |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | TP16 | pins 1 & 2 |
| | not alter | | closed |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | TP17 | pins 2 & 3 |
| | not alter | | closed |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | TP25 | pins 1 & 2 |
| | not alter | | closed |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | TP26 | Open |
| | not alter | | |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | TP27 | pins 1 & 2 |
| | not alter | | 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 |
|------------------+--------------------+--------------------|
| 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 | CJ1 | CJ2 | CJ3 |
|---------+-------------------+-------------------+----------|
| 64KB | pins 2 & 3 closed | pins 2 & 3 closed | Open |
|---------+-------------------+-------------------+----------|
| 128KB | pins 1 & 2 closed | Open | Closed |
|---------+-------------------+-------------------+----------|
| 256KB | pins 1 & 2 closed | pins 1 & 2 closed | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | Package | CPJ1 | CPJ2 | CPJ3 |
|----------+---------+------------+-------------+------------|
| 80486SX | PGA | Open | pins 2 & 3 | pins 2 & 3 |
| | | | closed | closed |
|----------+---------+------------+-------------+------------|
| 80486SX | PQFP | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 |
| | | closed | and 3 & 4 | closed |
| | | | closed | |
|----------+---------+------------+-------------+------------|
| 80487SX | PGA | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 |
| | | closed | and 3 & 4 | closed |
| | | | closed | |
|----------+---------+------------+-------------+------------|
| 80486DX | PGA | pins 2 & 3 | pins 1 & 2 | pins 2 & 3 |
| | | closed | and 3 & 4 | closed |
| | | | closed | |
|----------+---------+------------+-------------+------------|
| ODP486SX | PGA | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 |
| | | closed | and 3 & 4 | closed |
| | | | closed | |
|----------+---------+------------+-------------+------------|
| 80486DX2 | PGA | pins 2 & 3 | pins 1 & 2 | pins 2 & 3 |
| | | closed | and 3 & 4 | closed |
| | | | closed | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP22 |
|----------------------------+-------------------------------|
| AMD | pins 2 & 3 closed |
|----------------------------+-------------------------------|
| Intel | pins 2 & 3 closed |
|----------------------------+-------------------------------|
| Cyrix | pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | OSC1 | CS1 | CS2 | CS3 |
|--------+-------+-----------------+------------+------------|
| 20MHz | 20MHz | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 |
| | | closed | closed | closed |
|--------+-------+-----------------+------------+------------|
| 25MHz | 25MHz | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 |
| | | closed | closed | closed |
|--------+-------+-----------------+------------+------------|
| 33MHz | 33MHz | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 |
| | | closed | closed | closed |
|--------+-------+-----------------+------------+------------|
| 40MHz | 40MHz | pins 1 & 2 | pins 2 & 3 | pins 2 & 3 |
| | | closed | closed | closed |
|--------+-------+-----------------+------------+------------|
| 50iMHz | 25MHz | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 |
| | | closed | closed | closed |
|--------+-------+-----------------+------------+------------|
| 50MHz | 50MHz | pins 2 & 3 | pins 1 & 2 | pins 1 & 2 |
| | | closed | closed | closed |
|--------+-------+-----------------+------------+------------|
| 66iMHz | 33MHz | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 |
| | | closed | closed | closed |
+------------------------------------------------------------+