WESTERN DIGITAL CORPORATION
WD1002-27X
Replaced by the WD1004-27X
Data bus: 8-bit, PC/XT
Size: Half-length, full-height card
Hard drives supported: Two RLL ST506/412 drives
Floppy drives supported: None
Maximum heads/cyl.: 16 heads and 1024 cylinders
CONNECTIONS | |
Function |
Location |
34-pin control cable connector-hard drive |
J1 |
20-pin data cable connector-drive 0 |
J2 |
20-pin data cable connector-drive 1 |
J3 |
5-pin DC power connector |
J4 |
DRIVE TYPE CONFIGURATION | ||||
DRIVE 1 |
DRIVE 0 | |||
Type # |
S1/jumper 1 |
S1/jumper 2 |
S1/jumper 3 |
S1/jumper 4 |
0 |
closed |
closed |
closed |
closed |
1 |
open |
closed |
open |
closed |
2 |
closed |
open |
closed |
open |
3 |
open |
open |
open |
open |
USER CONFIGURABLE SETTINGS | |||
Function |
Location |
Setting | |
BIOS enabled |
W3 |
closed | |
BIOS disabled |
W3 |
open | |
I/O port address is 324-327h |
W4 |
pins 1 & 2 closed | |
I/O port address is 320-323h |
W4 |
pins 2 & 3 closed | |
2732 & 2764 BIOS supported (hard-wired) |
W5 |
pins 1 & 2 closed | |
2716 BIOS supported |
W5 |
pins 2 & 3 closed | |
8 head hard drive with RWC supported |
W6 |
pins 2 & 3 closed | |
16 head hard drive supported |
W6 |
pins 1 & 2 closed | |
Hard Drive Interrupt is IRQ5 (hard-wired) |
W7 |
pins 1 & 2 closed | |
Hard Drive Interrupt is IRQ2 |
W7 |
pins 2 & 3 closed | |
Single controller setting, primary controller |
W8 |
pins 2 & 3 closed | |
Dual controller setting, secondary controller |
W8 |
pins 1 & 2 closed | |
Firmware translation enabled |
W9 |
closed | |
Firmware translation disabled |
W9 |
open | |
Hard Drive Interrupt is IRQ5 |
S1/jumper 7 |
open | |
Hard Drive Interrupt is IRQ2 |
S1/jumper 7 |
closed | |
AT mode enabled |
S1/jumper 8 |
closed | |
XT mode enabled |
S1/jumper 8 |
open |
BIOS DRIVE TYPE TABLE | |||
Type # |
Formatted Capacity |
Heads |
Physical/Logical Cylinders |
0 |
65MB |
5 |
981/1023 |
1 |
92MB |
7 |
987/1023 |
2 |
33MB |
4 |
612/935 |
3 |
33MB |
4 |
615/940 |
TRANSLATION CONFIGURATION - S1 & W9 | ||||||
SPT |
BIOS Translate |
Dynamic Configuration |
RLL BIOS Type |
S1 Jumper 5 |
S1 Jumper 6 |
W9 see above |
- |
Undefined |
- |
- |
open |
open |
- |
17 |
yes |
no |
1 |
closed |
open |
open |
26 |
no |
yes |
2 |
open |
closed |
open |
17 |
no |
yes |
0 |
closed |
closed |
closed |
MISCELLANEOUS TECHNICAL NOTES |
This controller has a built-in low-level format program. To enter the program run the DEBUG utility supplied with DOS and at the prompt enter: G=C800:5. |