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# AUSTIN COMPUTER SYSTEMS
486-33I WBC
Processor 80486SX/80486DX
Processor Speed 20/25/33MHz
Chip Set OPTI
Max. Onboard 32MB
DRAM
Cache 64/256KB
BIOS AMI
Dimensions 330mm x 218mm
I/O Options Floppy drive interface, IDE interface,
parallel port, serial ports (2)
NPU Options 4167
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+-----------+------------------+----------|
| Reset switch | J1 | Serial port 1 | J21 |
|------------------+-----------+------------------+----------|
| Turbo LED | J2 pins 1 | Serial port 2 | J22 |
| | & 2 | | |
|------------------+-----------+------------------+----------|
| Turbo switch | J2 pins 3 | Power LED & | J23 |
| | & 4 | keylock | |
|------------------+-----------+------------------+----------|
| External battery | J10 | Speaker | J24 |
|------------------+-----------+------------------+----------|
| Floppy interface | J19 | Parallel port | J27 |
|------------------+-----------+------------------+----------|
| IDE interface | J20 | IDE interface | J28 |
| | | LED | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Monitor type select color | JP1 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Monitor type select monochrome | JP1 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | CMOS memory normal operation | JP2 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | CMOS memory clear | JP2 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP3 | pins 1 & 2 |
| | alter | | closed |
|---+----------------------------------+--------+------------|
| » | System clock speed select OSC/1 | JP4 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | System clock speed select OSC/2 | JP4 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Real time clock normal operation | JP14 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Real time clock reset | JP14 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | IRQ4 select serial port 1 | JP15 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | IRQ4 select serial port 2 | JP15 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | IRQ4 disabled | JP15 | pins 3 & 4 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | IRQ3 select serial port 1 | JP16 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | IRQ3 select serial port 2 | JP16 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | IRQ3 disabled | JP16 | pins 3 & 4 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | IRQ9 select serial port 1 | JP17 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | IRQ9 select serial port 2 | JP17 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | IRQ9 disabled | JP17 | pins 3 & 4 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | IRQ5 select serial port 1 | JP18 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | IRQ5 select serial port 2 | JP18 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | IRQ5 disabled | JP18 | pins 3 & 4 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Parallel port IRQ select IRQ7 | JP19 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Parallel port IRQ select IRQ5 | JP19 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Parallel port IRQ select no | JP19 | pins 3 & 4 |
| | interrupt | | closed |
|---+----------------------------------+--------+------------|
| » | IDE interface enabled | JP25 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | IDE interface disabled | JP25 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Floppy interface enabled | JP26 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Floppy interface disabled | JP26 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Serial port 1 select COM1 | JP27 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Serial port 1 select COM3 | JP27 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Serial port 1 disabled | JP27 | pins 3 & 4 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Serial port 2 select COM2 | JP28 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Serial port 2 select COM4 | JP28 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Serial port 2 disabled | JP28 | pins 3 & 4 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Parallel port select LPT1 | JP29 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Parallel port select LPT2 | JP29 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Parallel port disabled | JP29 | pins 3 & 4 |
| | | | 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 |
|------------------+--------------------+--------------------|
| 5MB | (4) 256K x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 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 |
|----------------------------+-------------------------------|
| 64KB | (8) 8K x 8 |
|----------------------------+-------------------------------|
| 256KB | (8) 32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP9 | JP10 |
|------------------+--------------------+--------------------|
| 64KB | pins 2 & 3 closed | pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 256KB | pins 1 & 2 closed | pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP5 | JP6 | JP7 |
|---------+----------------+----------------+----------------|
| 80486SX | pins 3 & 4 | pins 3 & 4 | pins 3 & 4 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 80487SX | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 80486DX | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 |
| | closed | closed | closed |
+------------------------------------------------------------+