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# AST RESEARCH, INC.
MID-SIZE BRAVO 486/33 (MODEL 202385-002)
Processor 80486DX
Processor Speed 33MHz
Chip Set AST
Max. Onboard DRAM 16MB
SRAM Cache None
BIOS AST
Dimensions 340mm x 245mm
I/O Options Bus mouse port, floppy drive interface
IDE interface, parallel port, serial port
(2), SVGA port
NPU Options 4167
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| SVGA port | CN1 | Floppy drive | J24 |
| | | interface | |
|-------------------+----------+------------------+----------|
| Bus mouse port | CN2 | External battery | J26 |
|-------------------+----------+------------------+----------|
| Serial port 1 | CN3 | Speaker | J27 |
| (COM1) | | | |
|-------------------+----------+------------------+----------|
| Parallel port | CN4 | Fan power | J28 |
|-------------------+----------+------------------+----------|
| VGA pass-through | J19 | Front panel | P29 |
| | | switches & LEDs | |
|-------------------+----------+------------------+----------|
| Serial port 2 | J20 | IDE interface | J40 |
| (COM2) | | LED | |
|-------------------+----------+------------------+----------|
| IDE interface | J22 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper/Switch | Position |
|-------------------------------+---------------+------------|
| » | Parity check enabled | E1 | closed |
|---+---------------------------+---------------+------------|
| | Parity check disabled | E1 | open |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | E2 | pins 2 & 3 |
| | not alter | | closed |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | E3 | pins 2 & 3 |
| | not alter | | closed |
|---+---------------------------+---------------+------------|
| » | VGA port enabled | SW1/switch 1 | closed |
|---+---------------------------+---------------+------------|
| | VGA port disabled | SW1/switch 1 | open |
|---+---------------------------+---------------+------------|
| » | Password check enabled | SW1/switch 2 | open |
|---+---------------------------+---------------+------------|
| | Password check disabled | SW1/switch 2 | closed |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | SW1/switch 3 | open |
| | not alter | | |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | SW1/switch 4 | open |
| | not alter | | |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | SW1/switch 5 | closed |
| | not alter | | |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | SW1/switch 6 | closed |
| | not alter | | |
|---+---------------------------+---------------+------------|
| » | Monitor type select PS/2 | SW1/switch 7 | closed |
| | style | | |
|---+---------------------------+---------------+------------|
| | Monitor type select AT | SW1/switch 7 | open |
| | style | | |
|---+---------------------------+---------------+------------|
| » | Monitor type select VGA | SW1/switch 8 | open |
| | or fixed-frequency | | |
|---+---------------------------+---------------+------------|
| | Monitor type select | SW1/switch 8 | closed |
| | multi-frequency | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 2MB | (2) 1M x 9 | NONE |
|------------------+--------------------+--------------------|
| 4MB | (2) 1M x 9 | (2) 1M x 9 |
|------------------+--------------------+--------------------|
| 8MB | (2) 4M x 9 | NONE |
|------------------+--------------------+--------------------|
| 10MB | (2) 4M x 9 | (2) 1M x 9 |
|------------------+--------------------+--------------------|
| 16MB | (2) 4M x 9 | (2) 4M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | VRAM |
|--------------------+---------------------------------------|
| 256KB | NONE |
|--------------------+---------------------------------------|
| 512KB | (2) 44256 |
+------------------------------------------------------------+