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# AST RESEARCH, INC.
PREMIUM WORKSTATION/286
Processor 80286
Processor Speed 10MHz
Chip Set AST
Max. Onboard DRAM 4MB
Cache None
BIOS AST
Dimensions 330mm x 218mm
I/O Options Floppy drive controller module, IDE
interface, parallel port, serial ports (2),
video controller module
NPU Options 80287
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| Parallel port | CN1 | IDE interface | J2 |
|------------------+----------+-------------------+----------|
| Serial port 2 | CN2 | Floppy drive | J3 |
| (COM2) | | controller module | |
|------------------+----------+-------------------+----------|
| Serial port 1 | CN3 | External battery | J6 |
| (COM1) | | | |
|------------------+----------+-------------------+----------|
| Riser card | CN4 | Optional ROM | U56 |
| | | (odd) | |
|------------------+----------+-------------------+----------|
| Video port | CN5 | Optional ROM | U65 |
| | | (even) | |
|------------------+----------+-------------------+----------|
| Front panel | J1 | | |
| switches & LEDs | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|------------------------------------+---------+-------------|
| » | BIOS type select 27128 | JP7 | pins 1 & 2 |
| | | | closed |
|----+-------------------------------+---------+-------------|
| | BIOS type select 27256 | JP7 | pins 2 & 3 |
| | | | closed |
|----+-------------------------------+---------+-------------|
| » | Factory configured - do not | JP8 | open |
| | alter | | |
|------------------------------------------------------------|
| Note:Jumper JP8 may not be present on all board revisions. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Jumpers JP1 through | Bank 0 | Bank 1 |
| | JP6 | | |
|-------+----------------------+--------------+--------------|
| 512KB | pins 1 & 2 closed | (2) 256K x 9 | NONE |
|-------+----------------------+--------------+--------------|
| 1MB | pins 1 & 2 closed | (2) 256K x 9 | (2) 256K x 9 |
|-------+----------------------+--------------+--------------|
| 2MB | pins 2 & 3 closed | (2) 1M x 9 | NONE |
|-------+----------------------+--------------+--------------|
| 4MB | pins 2 & 3 closed | (2) 1M x 9 | (2) 1M x 9 |
+------------------------------------------------------------+