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# AST RESEARCH, INC.
ADVANTAGE PLUS! SERIES 486 (MT)
(202528-101)
Processor 80486SX/80487SX/ODP486/ODPR486/80486DX/80486DX2/P24T
Processor 25/33/50(internal)/66(internal)MHz
Speed
Chip Set Unidentified
Max. 64MB
Onboard
DRAM
Cache 64/256KB
BIOS AST
Dimensions 355mm x 305mm
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 |
|-----------------+----------+--------------------+----------|
| VGA port | CN1 | Reset switch | E3 |
|-----------------+----------+--------------------+----------|
| Serial port | CN2 | IDE interface LED | E4 |
|-----------------+----------+--------------------+----------|
| Serial port | CN3 | 8514 video pass | J19 |
| | | through connector | |
|-----------------+----------+--------------------+----------|
| PS/2 mouse port | CN4 | IDE interface | J22 |
|-----------------+----------+--------------------+----------|
| Parallel port | CN5 | Floppy drive | J24 |
| | | interface | |
|-----------------+----------+--------------------+----------|
| Power LED | E1 | Chassis fan power | J28 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper/Switch | Position |
|-------------------------------+---------------+------------|
| » | CMOS memory normal | E5 | Open |
| | operation | | |
|---+---------------------------+---------------+------------|
| | CMOS memory clear | E5 | Closed |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | E14 | Pins 1 & 2 |
| | not alter | | closed |
|---+---------------------------+---------------+------------|
| » | Parallel port IRQ select | E15 | Pins 1 & 2 |
| | IRQ7 | | closed |
|---+---------------------------+---------------+------------|
| | Parallel port IRQ select | E15 | Pins 2 & 3 |
| | IRQ5 | | closed |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | E800 | Pins 2 & 3 |
| | not alter | | closed |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | E801 | Pins 1 & 2 |
| | not alter | | closed |
|---+---------------------------+---------------+------------|
| » | Monitor power | E802 | Pins 2 & 3 |
| | conservation disabled | | closed |
|---+---------------------------+---------------+------------|
| | Monitor power | E802 | Pins 1 & 2 |
| | conservation enabled | | closed |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | E803 | Pins 1 & 2 |
| | not alter | | closed |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | E804 | Pins 1 & 2 |
| | not alter | | closed |
|---+---------------------------+---------------+------------|
| » | On board video enabled | SW1/1 | Off |
|---+---------------------------+---------------+------------|
| | On board video disabled | SW1/1 | On |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | SW1/2 | Off |
| | not alter | | |
|---+---------------------------+---------------+------------|
| » | Flash BIOS normal | SW1/3 | Off |
| | operation | | |
|---+---------------------------+---------------+------------|
| | Flash BIOS force update | SW1/3 | On |
| | at boot | | |
|---+---------------------------+---------------+------------|
| » | Password enabled | SW1/4 | Off |
|---+---------------------------+---------------+------------|
| | Password disabled | SW1/4 | On |
|---+---------------------------+---------------+------------|
| » | Monitor type select color | SW1/5 | On |
|---+---------------------------+---------------+------------|
| | Monitor type select | SW1/5 | Off |
| | monochrome | | |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | SW1/6 | Off |
| | not alter | | |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | SW1/7 | Off |
| | not alter | | |
|---+---------------------------+---------------+------------|
| » | Setup access enabled | SW1/8 | Off |
|---+---------------------------+---------------+------------|
| | Setup access disabled | SW1/8 | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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) 1M x 36 | None | None | None |
|------+--------------+------------+------------+------------|
| 4MB | (1) 256K x | (1) 256K x | (1) 256K x | (1) 256K x |
| | 36 | 36 | 36 | 36 |
|------+--------------+------------+------------+------------|
| 5MB | (1) 1M x 36 | (1) 256K x | None | None |
| | | 36 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 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 |
|------+-------------+-------------+------------+------------|
| 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 | |
|------+-------------+-------------+------------+------------|
| 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 9 |
|------------------+--------------------+--------------------|
| 256KB | (8) 32K x 8 | (1) 32K x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | E6 | E7 | E8 |
|------------+-------------------+-------------+-------------|
| None | Pins 1 & 2 closed | Open | Open |
|------------+-------------------+-------------+-------------|
| 64KB | Pins 1 & 2 closed | Open | Open |
|------------+-------------------+-------------+-------------|
| 256KB | Pins 2 & 3 closed | Closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | E9 | E10 | E11 | E12 | E13 |
|-----------+---------+---------+---------+---------+--------|
| 80486SX | Open | 2 & 3 | 1 & 2 | Open | 2 & 3 |
|-----------+---------+---------+---------+---------+--------|
| 80487SX | 1 & 2 | 1 & 2 | 2 & 3 | Closed | 2 & 3 |
|-----------+---------+---------+---------+---------+--------|
| ODP486 | 1 & 2 | 1 & 2 | 2 & 3 | Closed | 2 & 3 |
|-----------+---------+---------+---------+---------+--------|
| ODPR486 | 2 & 3 | 1 & 2 | 1 & 2 | Closed | 2 & 3 |
|-----------+---------+---------+---------+---------+--------|
| 80486DX | 2 & 3 | 1 & 2 | 1 & 2 | Closed | 2 & 3 |
|-----------+---------+---------+---------+---------+--------|
| 80486DX2 | 2 & 3 | 1 & 2 | 1 & 2 | Closed | 2 & 3 |
|-----------+---------+---------+---------+---------+--------|
| P24T | 1 & 2 | 1 & 2 | 2 & 3 | Closed | 1 & 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | E16 |
|------------------------------+-----------------------------|
| 25MHz | Open |
|------------------------------+-----------------------------|
| 33MHz | Closed |
|------------------------------+-----------------------------|
| 50iMHz | Open |
|------------------------------+-----------------------------|
| 66iMHz | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VIDEO MEMORY CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|---------+----------------+----------------+----------------|
| 512KB | (1) 256K x 16 | None | None |
|---------+----------------+----------------+----------------|
| 1MB | (1) 256K x 16 | (1) 256K x 16 | None |
|---------+----------------+----------------+----------------|
| 2MB | (1) 256K x 16 | (1) 256K x 16 | (2) 256K x 16 |
|------------------------------------------------------------|
| Note: Bank 0 is factory installed and is not configurable. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MISCELLANEOUS TECHNICAL NOTE |
|------------------------------------------------------------|
| Note: The location of pin 1 is unidentified. |
+------------------------------------------------------------+