WESTERN DIGITAL CORPORATION
WD286-WDM20
|
Processor |
80286 |
|
Processor Speed |
12.5MHz |
|
Chip Set |
Faraday |
|
Max. Onboard DRAM |
4MB |
|
Cache |
None |
|
BIOS |
AMI |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
Parallel port, serial ports (2), bus mouse port, floppy drive interface, ST506/412 interface, video interface, IDE interface |
|
NPU Options |
80287 |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
IDE interface (optional) |
J5 |
Floppy drive interface |
J16 |
|
Hard drive access LED |
J10 |
ST506/412 drive control |
J17 |
|
Reset switch |
J11 |
Serial port 1 |
J19 |
|
ST506/412 data (Drive 0) |
J12 |
Serial port 2 |
J20 |
|
ST506/412 data (Drive 1) |
J13 |
Video interface |
J21 |
|
Power LED & keylock |
J14 |
PS/2 mouse port |
J22 |
|
Parallel port (LPT1) |
J15 |
Speaker |
J24 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
| » |
Factory configured - do not alter |
W4 & W6 |
Open |
| » |
Factory configured - do not alter |
W7 |
Closed |
| » |
Floppy drive interrupt enabled (IRQ6) |
W8 |
Closed |
|
Floppy drive interrupt disabled (IRQ6) |
W8 |
Open | |
| » |
Keyboard select AT compatible (101 key) |
W12 |
Open |
|
Keyboard select XT compatible (83 key) |
W12 |
Closed | |
| » |
Video port interrupt enabled (IRQ9) |
W13 |
Closed |
|
Video port interrupt disabled (IRQ9) |
W13 |
Open | |
| » |
Mouse port interrupt enabled (IRQ12) |
W17 |
Closed |
|
Mouse port interrupt disabled (IRQ12) |
W17 |
Open | |
| » |
Parallel port interrupt enabled (IRQ7) |
W19 |
Closed |
|
Parallel port interrupt disabled (IRQ7) |
W19 |
Open | |
| » |
Serial port 2 interrupt enabled (IRQ3) |
W20 |
Closed |
|
Serial port 2 interrupt disabled (IRQ3) |
W20 |
Open | |
| » |
Serial port 1 interrupt enabled (IRQ4) |
W21 |
Closed |
|
Serial port 1 interrupt disabled (IRQ4) |
W21 |
Open | |
| » |
Video port NMI enabled |
W23 |
Closed |
|
Video port NMI disabled |
W23 |
Open | |
| » |
Video port data buffering enabled |
W24 |
pins 1 & 2 closed |
|
Video port data buffering disabled |
W24 |
pins 2 & 3 closed | |
| » |
Video port enabled |
W25 |
Closed |
|
Video port disabled |
W25 |
Open | |
|
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 |
|
8MB |
(2) 4M x 9 |
NONE |
|
10MB |
(2) 1M x 9 |
(2) 4M x 9 |
|
16MB |
(2) 4M x 9 |
(2) 4M x 9 |
|
VIDEO CONFIGURATION | ||||||
|
Type |
S1/1 |
S1/2 |
S1/3 |
S1/4 |
S1/5 |
W18 |
|
Monochrome |
Off |
Off |
On |
Off |
Off |
1 & 2 |
|
CGA-40 columns |
On |
Off |
Off |
On |
Off |
2 & 3 |
|
CGA-80 columns |
Off |
Off |
Off |
On |
Off |
2 & 3 |
|
EGA-200 lines |
On |
On |
On |
Off |
Off |
2 & 3 |
|
EGA-350/480 lines |
Off |
On |
On |
Off |
Off |
2 & 3 |
|
Note: Pins designated should be in the closed position. | ||||||
|
HARD DRIVE CONFIGURATION | ||||
|
Type |
W3 |
W5 |
W10 |
W22 |
|
ST506/412 |
Closed |
Closed |
Open |
Open |
|
IDE |
Open |
Open |
Closed |
Closed |
|
Expansion card |
Open |
Open |
Open |
Open |
|
Note:An expansion card hard drive controller may be used in addition to the ST506/412 with the ST506/412 Settings. | ||||