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# WESTERN DIGITAL CORPORATION
WD286-LPM
Processor 80286
Processor Speed 6/12.5/16MHz
Chip Set Faraday
Max. Onboard 4MB
DRAM
Cache None
BIOS Phoenix
Dimensions 330mm x 198mm
I/O Options Parallel port, serial port (2), bus mousse
port, floppy drive interface, video
interface, IDE interface, proprietary bus
expansion slot
NPU Options 80287
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-----------------+----------+--------------------+----------|
| Bus mouse port | J4 | Parallel port | J10 |
|-----------------+----------+--------------------+----------|
| Reset switch | J6 | VGA interface | J12 |
|-----------------+----------+--------------------+----------|
| Floppy drive | J7 | IDE interface | J14 |
| interface | | | |
|-----------------+----------+--------------------+----------|
| Serial port 2 | J8 | IDE interface | J15 |
| | | LED/Keylock | |
|-----------------+----------+--------------------+----------|
| Serial port 1 | J9 | Local bus | S1 |
| | | expansion slot | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Monitor type select color | W3 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Monitor type select monochrome | W3 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Floppy drive interface enabled | W4 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Floppy drive interface disabled | W4 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | W5 | pins 1 & 2 |
| | alter | | closed |
|---+----------------------------------+--------+------------|
| » | NPU speed select 6MHz | W9 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | NPU speed select 12.5MHz | W9 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | NPU speed select 16MHz | W9 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Video port (J12) enabled | W11 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Video port (J12)disabled | W11 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | IDE interface LED enabled | W12 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | IDE interface LED disabled | W12 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | W15 | pins 2 & 3 |
| | alter | | closed |
|---+----------------------------------+--------+------------|
| » | Mouse port interrupt enabled | W16 | Closed |
| | (IRQ12) | | |
|---+----------------------------------+--------+------------|
| | Mouse port interrupt disabled | W16 | Open |
| | (IRQ12) | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | W17 | Open |
| | alter | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|--------------+-----------------------+---------------------|
| 1MB | (2) 256K x 9 | (2) 256K x 9 |
|--------------+-----------------------+---------------------|
| 2MB | (2) 1M x 9 | NONE |
|--------------+-----------------------+---------------------|
| 4MB | (2) 1M x 9 | (2) 1M x 9 |
|------------------------------------------------------------|
| Note:Bank 2 is an optional 128KB soldered onto the board |
| on the 12MHz version only. |
+------------------------------------------------------------+