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# AST RESEARCH, INC.
PREMIUM/486-25
Processor 80486DX
Processor Speed 25MHz
Chip Set AST
Max. Onboard None (36MB total on 32-bit external cards)
DRAM
Cache None
BIOS AST
Dimensions 355mm x 251mm
I/O Options Parallel port, serial ports (2), floppy drive
interface, IDE interface, 32-bit external
CPU/NPU card slot, 32-bit external memory
card slots (2), 16-bit external expansion
card slot
NPU Options 4167
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| 32-bit external | CN1 | Auxiliary floppy | P4 |
| CPU/NPU card | | drive interface | |
|------------------+----------+-------------------+----------|
| 32-bit external | CN2 | Power LED & reset | P5 |
| memory card | | switch | |
|------------------+----------+-------------------+----------|
| 32-bit external | CN3 | Speaker | P6 |
| memory card | | | |
|------------------+----------+-------------------+----------|
| 16-bit external | CN4 | External battery | P8 |
| expansion card | | | |
|------------------+----------+-------------------+----------|
| Primary floppy | P3 | IDE interface | P11 |
| drive interface | | | |
|------------------------------------------------------------|
| Note:Expansion card slots CN1 through CN4 will accept |
| standard 8 or 16-bit ISA cards. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Password check enabled | E1 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Password check disabled | E1 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | E2 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | E3 | Open |
| | alter | | |
+------------------------------------------------------------+
IMG IMG 2
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|----------------------------------+-----------+-------------|
| » | Parity check enabled | E1 | Closed |
|---+------------------------------+-----------+-------------|
| | Parity check disabled | E1 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 2MB | (2) 256K x 36 | NONE |
|------------------+--------------------+--------------------|
| 4MB | (2) 256K x 36 | (2) 256K x 36 |
+------------------------------------------------------------+
IMG IMG 3
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | SW1 | Position |
|-----------------------------------------+-------+----------|
| » | Parity check enabled | SW1/1 | On |
|---+-------------------------------------+-------+----------|
| | Parity check disabled | SW1/1 | Off |
|---+-------------------------------------+-------+----------|
| » | Total system memory is less than | SW1/2 | Off |
| | 16MB | | |
|---+-------------------------------------+-------+----------|
| | Total system memory is 16MB or more | SW1/2 | On |
|---+-------------------------------------+-------+----------|
| » | Factory configured - do not alter | SW1/3 | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM SWITCH CONFIGURATION |
|------------------------------------------------------------|
| Total | SW1/4 | SW1/5 | SW1/6 | SW1/7 | SW1/8 |
| memory | | | | | |
|-------------+---------+---------+--------+--------+--------|
| | 1MB | On | On | On | On | Off |
|----+--------+---------+---------+--------+--------+--------|
| | 2MB | On | On | On | Off | On |
|----+--------+---------+---------+--------+--------+--------|
| | 3MB | On | On | On | Off | Off |
|----+--------+---------+---------+--------+--------+--------|
| » | 4MB | On | On | Off | On | On |
|----+--------+---------+---------+--------+--------+--------|
| | 5MB | On | On | Off | On | Off |
|----+--------+---------+---------+--------+--------+--------|
| | 6MB | On | On | Off | Off | On |
|----+--------+---------+---------+--------+--------+--------|
| | 7MB | On | On | Off | Off | Off |
|----+--------+---------+---------+--------+--------+--------|
| | 8MB | On | Off | On | On | On |
|----+--------+---------+---------+--------+--------+--------|
| | 9MB | On | Off | On | On | Off |
|----+--------+---------+---------+--------+--------+--------|
| | 10MB | On | Off | On | Off | On |
|----+--------+---------+---------+--------+--------+--------|
| | 11MB | On | Off | On | Off | Off |
|----+--------+---------+---------+--------+--------+--------|
| | 12MB | On | Off | Off | On | On |
|----+--------+---------+---------+--------+--------+--------|
| | 13MB | On | Off | Off | On | Off |
|----+--------+---------+---------+--------+--------+--------|
| | 14MB | On | Off | Off | Off | On |
|----+--------+---------+---------+--------+--------+--------|
| | 15MB | On | Off | Off | Off | Off |
|----+--------+---------+---------+--------+--------+--------|
| | 16MB | Off | On | On | On | On |
|----+--------+---------+---------+--------+--------+--------|
| | 17MB | Off | On | On | On | Off |
|----+--------+---------+---------+--------+--------+--------|
| | 18MB | Off | On | On | Off | On |
|----+--------+---------+---------+--------+--------+--------|
| | 19MB | Off | On | On | Off | Off |
|----+--------+---------+---------+--------+--------+--------|
| | 20MB | Off | On | Off | On | On |
|------------------------------------------------------------|
| Note:Set the switches to the total amount of system memory |
| installed not including this card. |
| |
| A setting of more than 4MB means that this card is the |
| second memory card that is installed. |
+------------------------------------------------------------+
+----------------------------------------------------------------------------------------------------------------------+
| DRAM CONFIGURATION |
|----------------------------------------------------------------------------------------------------------------------|
| Size | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
|------+------+------+------+------+------+------+------+------+------+------+------+------+------+------+------+------|
| 0MB | None | None | None | None | None | None | None | None | None | None | None | None | None | None | None | None |
|------+------+------+------+------+------+------+------+------+------+------+------+------+------+------+------+------|
| 1MB |Filled| None | None | None | None | None | None | None | None | None | None | None | None | None | None | None |
|------+------+------+------+------+------+------+------+------+------+------+------+------+------+------+------+------|
| 2MB |Filled|Filled| None | None | None | None | None | None | None | None | None | None | None | None | None | None |
|------+------+------+------+------+------+------+------+------+------+------+------+------+------+------+------+------|
| 3MB |Filled|Filled|Filled| None | None | None | None | None | None | None | None | None | None | None | None | None |
|------+------+------+------+------+------+------+------+------+------+------+------+------+------+------+------+------|
| 4MB |Filled|Filled|Filled|Filled| None | None | None | None | None | None | None | None | None | None | None | None |
|------+------+------+------+------+------+------+------+------+------+------+------+------+------+------+------+------|
| 5MB |Filled|Filled|Filled|Filled|Filled| None | None | None | None | None | None | None | None | None | None | None |
|------+------+------+------+------+------+------+------+------+------+------+------+------+------+------+------+------|
| 6MB |Filled|Filled|Filled|Filled|Filled|Filled| None | None | None | None | None | None | None | None | None | None |
|------+------+------+------+------+------+------+------+------+------+------+------+------+------+------+------+------|
| 7MB |Filled|Filled|Filled|Filled|Filled|Filled|Filled| None | None | None | None | None | None | None | None | None |
|------+------+------+------+------+------+------+------+------+------+------+------+------+------+------+------+------|
|Filled|Filled|Filled|Filled|Filled|Filled|Filled|Filled|Filled| None | None | None | None | None | None | None | None |
|------+------+------+------+------+------+------+------+------+------+------+------+------+------+------+------+------|
| 9MB |Filled|Filled|Filled|Filled|Filled|Filled|Filled|Filled|Filled| None | None | None | None | None | None | None |
|------+------+------+------+------+------+------+------+------+------+------+------+------+------+------+------+------|
| 10MB |Filled|Filled|Filled|Filled|Filled|Filled|Filled|Filled|Filled|Filled| None | None | None | None | None | None |
|------+------+------+------+------+------+------+------+------+------+------+------+------+------+------+------+------|
| 11MB |Filled|Filled|Filled|Filled|Filled|Filled|Filled|Filled|Filled|Filled|Filled| None | None | None | None | None |
|------+------+------+------+------+------+------+------+------+------+------+------+------+------+------+------+------|
| 12MB |Filled|Filled|Filled|Filled|Filled|Filled|Filled|Filled|Filled|Filled|Filled|Filled| None | None | None | None |
|------+------+------+------+------+------+------+------+------+------+------+------+------+------+------+------+------|
| 13MB |Filled|Filled|Filled|Filled|Filled|Filled|Filled|Filled|Filled|Filled|Filled|Filled|Filled| None | None | None |
|------+------+------+------+------+------+------+------+------+------+------+------+------+------+------+------+------|
| 14MB |Filled|Filled|Filled|Filled|Filled|Filled|Filled|Filled|Filled|Filled|Filled|Filled|Filled|Filled| None | None |
|------+------+------+------+------+------+------+------+------+------+------+------+------+------+------+------+------|
| 15MB |Filled|Filled|Filled|Filled|Filled|Filled|Filled|Filled|Filled|Filled|Filled|Filled|Filled|Filled|Filled| None |
|------+------+------+------+------+------+------+------+------+------+------+------+------+------+------+------+------|
| 16MB |Filled|Filled|Filled|Filled|Filled|Filled|Filled|Filled|Filled|Filled|Filled|Filled|Filled|Filled|Filled|Filled|
|----------------------------------------------------------------------------------------------------------------------|
|Note:Banks (0 through 15) are filled using (1) 256K x 36 SIMMs. This table is for a single card only. |
+----------------------------------------------------------------------------------------------------------------------+