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# AST RESEARCH, INC.
ADVANTAGE! PRO 4/25S
Processor 80486SX/ODP486/80487SX/ODPR486/80486DX/80486DX2/P24T
Processor 25/33/50(internal)/66(internal)MHz
Speed
Chip Set Unidentified
Video Chip Cirrus Logic
Set
Maximum 64MB
Onboard
Memory
Maximum 1MB
Video
Memory
Cache 64/256KB
BIOS Unidentified
Dimensions 355mm x 304mm
I/O Floppy drive interface, IDE interface, parallel
Options port, PS/2 mouse port, serial ports (2), 8514 video
pass through connector, VGA port
NPU None
Options
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-----------------+----------+--------------------+----------|
| PS/2 mouse port | CN1 | 8514 video pass | J19 |
| | | through connector | |
|-----------------+----------+--------------------+----------|
| Serial port | CN2 | IDE interface | J22 |
|-----------------+----------+--------------------+----------|
| Serial port | CN3 | Floppy drive | J24 |
| | | interface | |
|-----------------+----------+--------------------+----------|
| Parallel port | CN4 | Chassis fan power | J28 |
|-----------------+----------+--------------------+----------|
| VGA port | CN5 | Front panel LEDs | J29 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|------------------------------------+-------+---------------|
| » | Monitor type select color | E4 | Closed |
|---+--------------------------------+-------+---------------|
| | Monitor type select monochrome | E4 | Open |
|---+--------------------------------+-------+---------------|
| » | On board video enabled | E5 | Closed |
|---+--------------------------------+-------+---------------|
| | On board video disabled | E5 | Open |
|---+--------------------------------+-------+---------------|
| » | Password normal operation | E6 | Closed |
|---+--------------------------------+-------+---------------|
| | Password clear | E6 | Open |
|---+--------------------------------+-------+---------------|
| » | Parallel port IRQ select IRQ7 | E12 | Pins 1 & 2 |
| | | | closed |
|---+--------------------------------+-------+---------------|
| | Parallel port IRQ select IRQ5 | E12 | Pins 2 & 3 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 1MB | (1) 256K x | None | None | None |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 2MB | (1) 256K x | (1) 256K x | None | None |
| | 36 | 36 | | |
|------+-------------+-------------+------------+------------|
| 3MB | (1) 256K x | (1) 256K x | (1) 256K x | None |
| | 36 | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 256K x | (1) 256K x | (1) 256K x | (1) 256K x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 1M x 36 | None | None | None |
|------+-------------+-------------+------------+------------|
| 5MB | (1) 1M x 36 | (1) 256K x | None | None |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 6MB | (1) 1M x 36 | (1) 256K x | (1) 256K x | None |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 7MB | (1) 1M x 36 | (1) 256K x | (1) 256K x | (1) 256K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 8MB | (1) 1M x 36 | (1) 1M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 9MB | (1) 1M x 36 | (1) 1M x 36 | (1) 256K x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 10MB | (1) 1M x 36 | (1) 1M x 36 | (1) 256K x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 12MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 13MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 4M x 36 | None | None | None |
|------+-------------+-------------+------------+------------|
| 17MB | (1) 4M x 36 | (1) 256K x | None | None |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 18MB | (1) 4M x 36 | (1) 256K x | (1) 256K x | None |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 19MB | (1) 4M x 36 | (1) 256K x | (1) 256K x | (1) 256K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 20MB | (1) 4M x 36 | (1) 1M x 36 | None | None |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 21MB | (1) 4M x 36 | (1) 1M x 36 | (1) 256K x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 22MB | (1) 4M x 36 | (1) 1M x 36 | (1) 256K x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 4M x 36 | (1) 1M x 36 | (1) 1M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 25MB | (1) 4M x 36 | (1) 1M x 36 | (1) 1M x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 28MB | (1) 4M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 4M x 36 | (1) 4M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 33MB | (1) 4M x 36 | (1) 4M x 36 | (1) 256K x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 34MB | (1) 4M x 36 | (1) 4M x 36 | (1) 256K x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 36MB | (1) 4M x 36 | (1) 4M x 36 | (1) 1M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 37MB | (1) 4M x 36 | (1) 4M x 36 | (1) 1M x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 40MB | (1) 4M x 36 | (1) 4M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 48MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 49MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 52MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 64MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | TAG |
|------------------+--------------------+--------------------|
| 64KB | (8) 8K x 8 | (1) 8K x 8 |
|------------------+--------------------+--------------------|
| 256KB | (8) 32K x 8 | (1) 32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | E1 | E2 | E3 |
|--------------+---------------+--------------+--------------|
| None | Open | Open | Open |
|--------------+---------------+--------------+--------------|
| 64KB | Open | Open | Open |
|--------------+---------------+--------------+--------------|
| 256KB | Closed | Closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VIDEO MEMORY CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|---------------+----------------------+---------------------|
| 512KB | (4) 256K x 4 | None |
|---------------+----------------------+---------------------|
| 1MB | (4) 256K x 4 | (4) 256K x 4 |
|------------------------------------------------------------|
| Note: Bank 0 is factory installed and is not configurable. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
| Speed | E9 | E10 |
|--------------------+-------------------+-------------------|
| 25MHz | Closed | Closed |
|--------------------+-------------------+-------------------|
| 33MHz | Open | Closed |
|--------------------+-------------------+-------------------|
| 50iMHz | Closed | Closed |
|--------------------+-------------------+-------------------|
| 66iMHz | Open | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | E11 | E13 | E14 | E15 | E16 | E17 |
|-----------+--------+--------+-------+-------+------+-------|
| 80486SX | Open | Open | 1 & 2 | 1 & 2 | 1 & | 1 & 2 |
| (PQFP) | | | | | 2 | |
|-----------+--------+--------+-------+-------+------+-------|
| 80486SX | Closed | Open | 1 & 2 | 1 & 2 | 1 & | 1 & 2 |
| (PGA) | | | | | 2 | |
|-----------+--------+--------+-------+-------+------+-------|
| ODP486 | Closed | Closed | 1 & 2 | 1 & 2 | 2 & | 1 & 2 |
| | | | | | 3 | |
|-----------+--------+--------+-------+-------+------+-------|
| 80487SX | Closed | Closed | 1 & 2 | 1 & 2 | 2 & | 1 & 2 |
| | | | | | 3 | |
|-----------+--------+--------+-------+-------+------+-------|
| ODPR486 | Closed | Closed | 2 & 3 | 1 & 2 | 2 & | 1 & 2 |
| | | | | | 3 | |
|-----------+--------+--------+-------+-------+------+-------|
| 80486DX | Closed | Closed | 2 & 3 | 1 & 2 | 2 & | 1 & 2 |
| | | | | | 3 | |
|-----------+--------+--------+-------+-------+------+-------|
| 80486DX2 | Closed | Closed | 2 & 3 | 1 & 2 | 2 & | 1 & 2 |
| | | | | | 3 | |
|-----------+--------+--------+-------+-------+------+-------|
| P24T | Closed | Closed | 2 & 3 | 2 & 3 | 2 & | Open |
| | | | | | 3 | |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
| The location of the PQFP socket is unidentified. |
+------------------------------------------------------------+