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# ASUS COMPUTER INTERNATIONAL
VL/I-486SV2G (REV. 1.0)
VL/I-486SV2GX4 (REV. 1.0)
Processor CX486S/80486SX/SL80486SX/486 Overdrive/SL486 Overdrive/
80487SX/CX486DX/80486DX/SL80486DX/80486DX2/SL80486DX2/CX486DX2/80486DX4/P24T
Processor 20/25/33/40/50(internal)/50/66(internal)/75(internal)/
Speed
100(internal)MHz
Chip Set SIS
Video Chip None
Set
Maximum 64MB
Onboard
Memory
Maximum None
Video
Memory
Cache 128/256/512/1024KB
BIOS Award
Dimensions 254mm x 218mm
I/O 32-bit VESA local bus slots (2), green PC connector
Options
NPU None
Options
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| Power LED & | J1 | Green PC | JP2 |
| keylock | | connector | |
|------------------+----------+-------------------+----------|
| Speaker | J2 | Green PC | JP3 |
| | | connector | |
|------------------+----------+-------------------+----------|
| Reset switch | J3 | Green PC | JP4 |
| | | connector | |
|------------------+----------+-------------------+----------|
| Turbo LED | J4 | Green PC | JP28 |
| | | connector | |
|------------------+----------+-------------------+----------|
| Turbo switch | J5 | 32-bit VESA local | SL1 & |
| | | bus slots | SL2 |
|------------------+----------+-------------------+----------|
| External battery | J6 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-------------------------------------+-------+--------------|
| | Battery type select internal | JP1 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | Battery type select external | JP1 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | IRQ12 enabled | JP7 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | IRQ12 disabled | JP7 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP8 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| | Monitor type select | JP9 | Pins 1 & 2 |
| | monochrome/VGA | | closed |
|---+---------------------------------+-------+--------------|
| | Monitor type select CGA | JP9 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | Green PC enabled (JP28) | JP10 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | Green PC disabled (RC control) | JP10 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | VESA clock delay enabled | JP24 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | VESA clock delay disabled | JP24 | Pins 2 & 3 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 1MB | (1) 256K x | None | None | None |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 2MB | (1) 256K x | (1) 256K x | None | None |
| | 36 | 36 | | |
|------+-------------+-------------+------------+------------|
| 2MB | (1) 512K x | None | None | None |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 1M x 36 | None | None | None |
|------+-------------+-------------+------------+------------|
| 5MB | (1) 256K x | (1) 1M x 36 | None | None |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 6MB | (1) 256K x | (1) 256K x | (1) 1M x | None |
| | 36 | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 6MB | (1) 512K x | None | (1) 1M x | None |
| | 36 | | 36 | |
|------+-------------+-------------+------------+------------|
| 8MB | (1) 1M x 36 | (1) 1M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 10MB | (1) 256K x | (1) 256K x | (1) 1M x | (1) 1M x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 10MB | (1) 256K x | (1) 256K x | (1) 2M x | None |
| | 36 | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 10MB | (1) 512K x | None | (1) 1M x | (1) 1M x |
| | 36 | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 10MB | (1) 512K x | None | (1) 2M x | None |
| | 36 | | 36 | |
|------+-------------+-------------+------------+------------|
| 12MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 12MB | (1) 2M x 36 | None | (1) 1M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 1M x 36 | (1) 1M x 36 | (1) 2M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 2M x 36 | None | (1) 2M x | None |
| | | | 36 | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|-------+--------------+--------------+-----------+----------|
| 16MB | (1) 2M x 36 | None | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|-------+--------------+--------------+-----------+----------|
| 16MB | (1) 4M x 36 | None | None | None |
|-------+--------------+--------------+-----------+----------|
| 17MB | (1) 256K x | (1) 4M x 36 | None | None |
| | 36 | | | |
|-------+--------------+--------------+-----------+----------|
| 18MB | (1) 256K x | (1) 256K x | (1) 4M x | None |
| | 36 | 36 | 36 | |
|-------+--------------+--------------+-----------+----------|
| 18MB | (1) 512K x | None | (1) 4M x | None |
| | 36 | | 36 | |
|-------+--------------+--------------+-----------+----------|
| 20MB | (1) 1M x 36 | (1) 4M x 36 | None | None |
|-------+--------------+--------------+-----------+----------|
| 24MB | (1) 1M x 36 | (1) 1M x 36 | (1) 4M x | None |
| | | | 36 | |
|-------+--------------+--------------+-----------+----------|
| 24MB | (1) 2M x 36 | None | (1) 4M x | None |
| | | | 36 | |
|-------+--------------+--------------+-----------+----------|
| 32MB | (1) 4M x 36 | (1) 4M x 36 | None | None |
|-------+--------------+--------------+-----------+----------|
| 32MB | (1) 8M x 36 | None | None | None |
|-------+--------------+--------------+-----------+----------|
| 36MB | (1) 1M x 36 | (1) 4M x 36 | (1) 4M x | None |
| | | | 36 | |
|-------+--------------+--------------+-----------+----------|
| 40MB | (1) 1M x 36 | (1) 1M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
|-------+--------------+--------------+-----------+----------|
| 40MB | (1) 1M x 36 | (1) 1M x 36 | (1) 8M x | None |
| | | | 36 | |
|-------+--------------+--------------+-----------+----------|
| 40MB | (1) 2M x 36 | None | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
|-------+--------------+--------------+-----------+----------|
| 40MB | (1) 2M x 36 | None | (1) 8M x | None |
| | | | 36 | |
|-------+--------------+--------------+-----------+----------|
| 48MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | None |
| | | | 36 | |
|-------+--------------+--------------+-----------+----------|
| 64MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
|-------+--------------+--------------+-----------+----------|
| 64MB | (1) 4M x 36 | (1) 4M x 36 | (1) 8M x | None |
| | | | 36 | |
|-------+--------------+--------------+-----------+----------|
| 64MB | (1) 8M x 36 | None | (1) 8M x | None |
| | | | 36 | |
|------------------------------------------------------------|
| Note: The location of banks 0, 1, 2, & 3 are unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG |
|------------+---------------+---------------+---------------|
| 128KB | (4) 32K x 8 | None | (1) 8K x 8 |
|------------+---------------+---------------+---------------|
| 256KB (A) | (4) 32K x 8 | (4) 32K x 8 | (1) 32K x 8 |
|------------+---------------+---------------+---------------|
| 256KB (B) | (4) 64K x 8 | None | (1) 32K x 8 |
|------------+---------------+---------------+---------------|
| 512KB (A) | (4) 64K x 8 | (4) 64K x 8 | (1) 32K x 8 |
|------------+---------------+---------------+---------------|
| 512KB (B) | (4) 128K x 8 | None | (1) 32K x 8 |
|------------+---------------+---------------+---------------|
| 1MB | (4) 128K x 8 | (4) 128K x 8 | (1) 128K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP13 | JP14 | JP25 |
|-----------+----------------+---------------+---------------|
| 128KB | Open | Pins 2 & 3 | Pins 1 & 2 |
| | | closed | closed |
|-----------+----------------+---------------+---------------|
| 256KB (A) | Open | Pins 1 & 2 | Pins 1 & 2 |
| | | closed | closed |
|-----------+----------------+---------------+---------------|
| 256KB (B) | Pins 1 & 2 | Pins 2 & 3 | Pins 1 & 2 |
| | closed | closed | closed |
|-----------+----------------+---------------+---------------|
| 512KB (A) | Pins 4 & 5 | Pins 1 & 2 | Pins 2 & 3 |
| | closed | closed | closed |
|-----------+----------------+---------------+---------------|
| 512KB (B) | Pins 1 & 2 | Pins 2 & 3 | Pins 2 & 3 |
| | closed | closed | closed |
|-----------+----------------+---------------+---------------|
| 1MB | Pins 2 & 3 | Pins 1 & 2 | Pins 2 & 3 |
| | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
| Speed | JP21 | JP22 | JP23 |
|---------+----------------+----------------+----------------|
| 20MHz | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 25MHz | Pins 2 & 3 | Pins 1 & 2 | Pins 1 & 2 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 33MHz | Pins 2 & 3 | Pins 2 & 3 | Pins 2 & 3 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 40MHz | Pins 2 & 3 | Pins 2 & 3 | Pins 1 & 2 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 50iMHz | Pins 2 & 3 | Pins 1 & 2 | Pins 1 & 2 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 50MHz | Pins 1 & 2 | Pins 1 & 2 | Pins 2 & 3 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 66iMHz | Pins 2 & 3 | Pins 2 & 3 | Pins 2 & 3 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 75iMHz | Pins 2 & 3 | Pins 1 & 2 | Pins 1 & 2 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 100iMHz | Pins 2 & 3 | Pins 2 & 3 | Pins 2 & 3 |
| | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | JP16 | JP17 | JP18 | JP19 | JP20 |
|---------------+----------+-------+--------+--------+-------|
| CX468S | 2 & 3, 4 | 1 & 2 | 1 & 2, | 2 & 3 | 2 & 3 |
| | & 5 | | 3 & 4 | | |
|---------------+----------+-------+--------+--------+-------|
| 80486SX | Open | Open | Open | 2 & 3 | 2 & 3 |
|---------------+----------+-------+--------+--------+-------|
| SL80486SX | 3 & 4, 5 | Open | 4 & 5 | 2 & 3 | 2 & 3 |
| | & 6 | | | | |
|---------------+----------+-------+--------+--------+-------|
| 486 Overdrive | Open | Open | Open | 1 & 2 | 2 & 3 |
|---------------+----------+-------+--------+--------+-------|
| SL486 | 5 & 6 | Open | 4 & 5 | 1 & 2 | 2 & 3 |
| Overdrive | | | | | |
|---------------+----------+-------+--------+--------+-------|
| 80487SX | Open | Open | Open | 1 & 2 | 2 & 3 |
|---------------+----------+-------+--------+--------+-------|
| CX486DX | 2 & 3, 4 | 1 & 2 | 1 & 2, | 1 & 2 | 2 & 3 |
| | & 5 | | 3 & 4 | | |
|---------------+----------+-------+--------+--------+-------|
| 80486DX | Open | Open | Open | 1 & 2 | 2 & 3 |
|---------------+----------+-------+--------+--------+-------|
| SL80486DX | 3 & 4, 5 | Open | 4 & 5 | 1 & 2 | 2 & 3 |
| | & 6 | | | | |
|---------------+----------+-------+--------+--------+-------|
| 80486DX2 | Open | Open | Open | 1 & 2 | 2 & 3 |
|---------------+----------+-------+--------+--------+-------|
| SL80486DX2 | 3 & 4, 5 | Open | 4 & 5 | 1 & 2 | 2 & 3 |
| | & 6 | | | | |
|---------------+----------+-------+--------+--------+-------|
| CX486DX2 | 2 & 3, 4 | 1 & 2 | 1 & 2, | 1 & 2, | 2 & 3 |
| | & 5 | | 3 & 4 | 4 & 5 | |
|---------------+----------+-------+--------+--------+-------|
| 80486DX4 (2x) | 3 & 4, 5 | 5 & 6 | 4 & 5 | 1 & 2 | 2 & 3 |
| | & 6 | | | | |
|---------------+----------+-------+--------+--------+-------|
| 80486DX4 | 3 & 4, 5 | 4 & 5 | 4 & 5 | 1 & 2 | 2 & 3 |
| (2.5x) | & 6 | | | | |
|---------------+----------+-------+--------+--------+-------|
| 80486DX4 (3x) | 3 & 4, 5 | Open | 4 & 5 | 1 & 2 | 2 & 3 |
| | & 6 | | | | |
|---------------+----------+-------+--------+--------+-------|
| P24T | 5 & 6 | Open | 4 & 5 | 1 & 2 | 1 & 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | JP11 |
|----------------------------+-------------------------------|
| Cyrix | Pins 1 & 2 closed |
|----------------------------+-------------------------------|
| Intel | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU HARDWARE TRAP SELECTION |
|------------------------------------------------------------|
| Type | JP5 | JP6 |
|------------------+--------------------+--------------------|
| CX468S | Pins 2 & 3 closed | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 80486SX | Pins 1 & 2 closed | Pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| SL80486SX | Pins 1 & 2 closed | Pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| CX486DX | Pins 2 & 3 closed | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 80486DX | Pins 1 & 2 closed | Pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| SL80486DX | Pins 1 & 2 closed | Pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 80486DX2 | Pins 1 & 2 closed | Pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| SL80486DX2 | Pins 1 & 2 closed | Pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| CX486DX2 | Pins 2 & 3 closed | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 80486DX4 | Pins 1 & 2 closed | Pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| P24T | Pins 1 & 2 closed | Pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION |
|------------------------------------------------------------|
| Voltage | JP12 | JP15 |
|------------------+--------------------+--------------------|
| 3v | Pins 2 & 3 closed | Pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 5v | Pins 1 & 2 closed | Pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VL BUS WAIT STATE SELECTION |
|------------------------------------------------------------|
| Setting | JP26 |
|----------------------------+-------------------------------|
| 0 | Pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 1 | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VL BUS SPEED SELECTION |
|------------------------------------------------------------|
| Speed | JP27 |
|----------------------------+-------------------------------|
| <= 33MHz | Pins 1 & 2 closed |
|----------------------------+-------------------------------|
| >33 MHz | Pins 2 & 3 closed |
+------------------------------------------------------------+