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# AUSTIN COMPUTER SYSTEMS
486 LX VESA LOCAL BUS WINSTATION
Processor 80486SX/80487SX/80486DX/80486DX2
Processor Speed 25/33/50(Internal)/50/66(Internal)MHz
Chip Set SIS
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 None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|--------------+----------+-----------------------+----------|
| Turbo LED | J3 | Reset switch | J6 |
|--------------+----------+-----------------------+----------|
| Turbo switch | J4 | Power LED & keylock | J7 |
|--------------+----------+-----------------------+----------|
| Speaker | J5 | 32-bit VESA local bus | S1 & S2 |
| | | slots | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper/Switch | Position |
|-------------------------------+---------------+------------|
| » | Factory configured do not | JP1 | Open |
| | alter | | |
|---+---------------------------+---------------+------------|
| » | Monitor type select color | JP2 | Closed |
|---+---------------------------+---------------+------------|
| | Monitor type select | JP2 | Open |
| | monochrome | | |
|---+---------------------------+---------------+------------|
| » | Factory configured do not | JP9 | Pins 1 & 2 |
| | alter | | closed |
|---+---------------------------+---------------+------------|
| » | Factory configured do not | JP14 | Pins 1 & 2 |
| | alter | | closed |
|---+---------------------------+---------------+------------|
| » | Factory configured do not | JP15 | Open |
| | alter | | |
|---+---------------------------+---------------+------------|
| » | Factory configured do not | JP16 | Open |
| | alter | | |
|---+---------------------------+---------------+------------|
| » | Factory configured do not | JP24 | Pins 2 & 3 |
| | alter | | open |
|---+---------------------------+---------------+------------|
| » | Factory configured do not | JP25 | Pins 1 & 2 |
| | alter | | open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 | Cache | Location | TAG |
|------------+---------------+---------------+---------------|
| 64KB | (8) 8K x 8 | Banks 0 & 1 | (1) 8K x 8 |
|------------+---------------+---------------+---------------|
| 128KB | (4) 32K x 8 | Bank 0 | (1) 8K x 8 |
|------------+---------------+---------------+---------------|
| 256KB | (8) 32K x 8 | Banks 0 & 1 | (1) 32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | SR1 | SR2 | SR3 | SR4 | SR5 | SR6 |
|-------+--------+--------+--------+--------+--------+-------|
| 64KB | Pins 2 | Pins 2 | Pins 1 | Pins 2 | Pins 1 | Pins |
| | & 3 | & 3 | & 2 | & 3 | & 2 | 1 & 2 |
|-------+--------+--------+--------+--------+--------+-------|
| 128KB | Pins 1 | Pins 1 | Pins 2 | Pins 2 | Pins 2 | Pins |
| | & 2 | & 2 | & 3 | & 3 | & 3 | 1 & 2 |
|-------+--------+--------+--------+--------+--------+-------|
| 256KB | Pins 2 | Pins 2 | Pins 2 | Pins 2 | Pins 2 | Pins |
| | & 3 | & 3 | & 3 | & 3 | & 3 | 2 & 3 |
|------------------------------------------------------------|
| NotePins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| CPU Type | JP6 | JP7 | JP8 |
|-----------+--------+-------------------+-------------------|
| 80486SX | Open | Open | Pins 2 & 3 closed |
|-----------+--------+-------------------+-------------------|
| 80487SX | Closed | Pins 2 & 3 closed | Pins 1 & 2 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 | JP10 | JP11 | JP12 | JP13 |
|--------+------------+------------+------------+------------|
| 25MHz | Pins 2 & 3 | Pins 2 & 3 | Pins 1 & 2 | Pins 1 & 2 |
|--------+------------+------------+------------+------------|
| 33MHz | Pins 1 & 2 | Pins 2 & 3 | Pins 1 & 2 | Pins 1 & 2 |
|--------+------------+------------+------------+------------|
| 50iMHz | Pins 2 & 3 | Pins 2 & 3 | Pins 1 & 2 | Pins 1 & 2 |
|--------+------------+------------+------------+------------|
| 50MHz | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 |
|--------+------------+------------+------------+------------|
| 66iMHz | Pins 1 & 2 | Pins 2 & 3 | Pins 1 & 2 | Pins 1 & 2 |
|------------------------------------------------------------|
| NotePins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VESA CPU TYPE (ID0 & ID1) CONFIGURATION |
|------------------------------------------------------------|
| CPU TYPE | JP24 (ID0) | JP25 (ID1) |
|------------------+--------------------+--------------------|
| 80386 | Pins 2 & 3 closed | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 80486 | Pins 2 & 3 closed | Pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VESA WAIT STATE (ID2) CONFIGURATION |
|------------------------------------------------------------|
| Wait states | CPU Speed | JP26 |
|--------------------+------------------+--------------------|
| 0 wait states | £ 33MHz | Pins 1 & 2 closed |
|--------------------+------------------+--------------------|
| 1 wait state | > 33MHz | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VESA WAIT STATE (ID2) CONFIGURATION |
|------------------------------------------------------------|
| CPU Speed | JP27 |
|----------------------------+-------------------------------|
| <= 33MHz | Pins 1 & 2 closed |
|----------------------------+-------------------------------|
| > 33MHz | Pins 2 & 3 closed |
+------------------------------------------------------------+