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# AST RESEARCH, INC.
PREMIUM II 386/25 & 386/33
MODELS 202373-001 & 202373-002
Processor 80386DX (on external CPU/Memory module)
Processor Speed 25/33MHz
Chip Set AST
Max. Onboard None (16MB on external CPU/Memory module)
DRAM
Cache None (16KB on external CPU/Memory module)
BIOS AST
Dimensions 344mm x 250mm
I/O Options 32-bit external CPU/Memory module slot,
32-bit external Memory module slot (2),
bus mouse port, floppy drive interface, IDE
interface, parallel port, serial port (2),
SVGA port
NPU Options 80387/3167(on external CPU/Memory module)
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|--------------------+----------+-----------------+----------|
| SVGA port | CN1 | Front panel | P5 |
| | | switches & LEDs | |
|--------------------+----------+-----------------+----------|
| Bus mouse port | CN2 | Speaker | P6 |
|--------------------+----------+-----------------+----------|
| Serial port 1 | CN3 | External | P8 |
| | | battery | |
|--------------------+----------+-----------------+----------|
| Parallel port | CN4 | IDE interface | P11 |
|--------------------+----------+-----------------+----------|
| Serial port 2 | J15 | Fan power | P101 |
|--------------------+----------+-----------------+----------|
| VGA pass-through | J18 | 32-bit external | S1 |
| | | CPU/Memory | |
| | | module | |
|--------------------+----------+-----------------+----------|
| Floppy drive | P3 | 32-bit external | S2 |
| interface | | Memory module | |
| | | slot | |
|--------------------+----------+-----------------+----------|
| Third floppy drive | P4 | 32-bit external | S3 |
| interface | | Memory module | |
| | | slot | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Switch | Position |
|------------------------------------+------------+----------|
| » | VGA port enabled | SW1/switch | Closed |
| | | 1 | |
|---+--------------------------------+------------+----------|
| | VGA port disabled | SW1/switch | Open |
| | | 1 | |
|---+--------------------------------+------------+----------|
| » | Password check enabled | SW1/switch | Open |
| | | 2 | |
|---+--------------------------------+------------+----------|
| | Password check disabled | SW1/switch | Closed |
| | | 2 | |
|---+--------------------------------+------------+----------|
| » | Factory configured - do not | SW1/switch | Open |
| | alter | 3 | |
|---+--------------------------------+------------+----------|
| » | Factory configured - do not | SW1/switch | Open |
| | alter | 4 | |
|---+--------------------------------+------------+----------|
| » | Factory configured - do not | SW1/switch | Closed |
| | alter | 5 | |
|---+--------------------------------+------------+----------|
| » | Factory configured - do not | SW1/switch | Closed |
| | alter | 6 | |
|---+--------------------------------+------------+----------|
| » | Monitor type select PS/2 style | SW1/switch | Closed |
| | | 7 | |
|---+--------------------------------+------------+----------|
| | Monitor type select AT style | SW1/switch | Open |
| | | 7 | |
|---+--------------------------------+------------+----------|
| » | Monitor type select VGA or | SW1/switch | Open |
| | fixed-frequency | 8 | |
|---+--------------------------------+------------+----------|
| | Monitor type select | SW1/switch | Closed |
| | multi-frequency | 8 | |
+------------------------------------------------------------+
IMG IMG 2
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|------------------------------------+----------+------------|
| » | Parity check enabled | E1 | Closed |
|------+-----------------------------+----------+------------|
| | Parity check disabled | E1 | Open |
|------------------------------------------------------------|
| Note:AST CPU/Memory module part number is 202403-001 or |
| 202403-004. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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) 1M x 9 | (2) 4M x 9 |
|----------------+---------------------+---------------------|
| 16MB | (2) 4M x 9 | (2) 4M x 9 |
|------------------------------------------------------------|
| Notes:16KB of SRAM Cache is on the CPU/Memory module. |
| 128KB of DRAM is reserved for System |
| |
| and VGA BIOS shadowing and cannot be disabled. Up to two |
| of the following memory boards |
| |
| may be installed in addition to the CPU/Memory module: AST |
| part numbers 202275-004, |
| |
| 202275-006, 202387-001, or 202387-005. |
+------------------------------------------------------------+