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# AST RESEARCH, INC.
Mid-Size Bravo 386SX (Model 202382-005)
Processor 80386SX
Processor Speed 20/25MHz
Chip Set AST
Max. Onboard 16MB
DRAM
SRAM Cache None
BIOS AST
Dimensions 340mm x 245mm
I/O Options 16-bit external CPU card slot, bus mouse
port, floppy drive interface, IDE interface,
parallel port, serial port (2), SVGA port
NPU Options 80387SX
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 | IDE interface | J35 |
| | | LED | |
|-------------------+----------+------------------+----------|
| Serial port 2 | J20 | Front panel | P29 |
| (COM2) | | switches & LEDs | |
|-------------------+----------+------------------+----------|
| IDE interface | J22 | 16-bit external | S1 |
| | | CPU card | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Switch | Position |
| | SW1 | |
|------------------------------------+-----------+-----------|
| » | VGA port enabled | switch 1 | closed |
|---+--------------------------------+-----------+-----------|
| | VGA port disabled | switch 1 | open |
|---+--------------------------------+-----------+-----------|
| » | Password check enabled | switch 2 | open |
|---+--------------------------------+-----------+-----------|
| | Password check disabled | switch 2 | closed |
|---+--------------------------------+-----------+-----------|
| » | Factory configured - do not | switch 3 | open |
| | alter | | |
|---+--------------------------------+-----------+-----------|
| » | Factory configured - do not | switch 4 | open |
| | alter | | |
|---+--------------------------------+-----------+-----------|
| » | Factory configured - do not | switch 5 | closed |
| | alter | | |
|---+--------------------------------+-----------+-----------|
| » | Factory configured - do not | switch 6 | closed |
| | alter | | |
|---+--------------------------------+-----------+-----------|
| » | Monitor type select PS/2 style | switch 7 | closed |
|---+--------------------------------+-----------+-----------|
| | Monitor type select AT style | switch 7 | open |
|---+--------------------------------+-----------+-----------|
| » | Monitor type select VGA or | switch 8 | open |
| | fixed-frequency | | |
|---+--------------------------------+-----------+-----------|
| | Monitor type select | switch 8 | closed |
| | multi-frequency | | |
|---+--------------------------------+-----------+-----------|
| » | Factory configured - do not | switch 9 | open |
| | alter | | |
|---+--------------------------------+-----------+-----------|
| » | Factory configured - do not | switch 10 | open |
| | alter | | |
|------------------------------------------------------------|
| Note:Board uses an 80386SX 20/25MHz CPU card. (AST part |
| numbers 202401-001 and -002) |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|------------+---------------+---------------+---------------|
| 1MB | (2) 256K x 9 | (2) 256K x 9 | NONE |
|------------+---------------+---------------+---------------|
| 1.5MB | (2) 256K x 9 | (2) 256K x 9 | (2) 256K x 9 |
|------------+---------------+---------------+---------------|
| 2MB | (2) 1M x 9 | (2) 1M x 9 | NONE |
|------------+---------------+---------------+---------------|
| 3MB | (2) 256K x 9 | (2) 256K x 9 | (2) 1M x 9 |
|------------+---------------+---------------+---------------|
| 4MB | (2) 1M x 9 | (2) 1M x 9 | NONE |
|------------+---------------+---------------+---------------|
| 4.5MB | (2) 1M x 9 | (2) 1M x 9 | (2) 256K x 9 |
|------------+---------------+---------------+---------------|
| 6MB | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 |
|------------+---------------+---------------+---------------|
| 8MB | (2) 4M x 9 | NONE | NONE |
|------------+---------------+---------------+---------------|
| 9MB | (2) 256K x 9 | (2) 256K x 9 | (2) 4M x 9 |
|------------+---------------+---------------+---------------|
| 12MB | (2) 1M x 9 | (2) 1M x 9 | (2) 4M x 9 |
|------------+---------------+---------------+---------------|
| 16MB | (2) 4M x 9 | (2) 4M x 9 | NONE |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | VRAM |
|----------------------------+-------------------------------|
| 256KB | NONE |
|----------------------------+-------------------------------|
| 512KB | (2) 44256 |
+------------------------------------------------------------+