WESTERN DIGITAL CORPORATION
WD1002S-WX2A
Data bus: 8-bit, PC/XT
Size: Full-length, full-height card
Hard drives supported: Two MFM ST506/412 drives
Floppy drives supported: None
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 |
USER CONFIGURABLE SETTINGS | |||
Function | Location | Setting | |
» | Not used | W1 & W2 | N/A |
» | BIOS enabled | W3 | closed |
BIOS disabled | W3 | open | |
» | I/O port address 320h | W4 | pins 2 & 3 closed |
I/O port address 324h | W4 | pins 1 & 2 closed | |
» | BIOS size 32K or 64K | W5 | pins 1 & 2 closed |
BIOS size 16K | W5 | pins 2 & 3 closed | |
» | 16 head hard drive supported (Head Select 3) | W6 | pins 1 & 2 closed |
8 Head hard drive with RWC supported | W6 | pins 2 & 3 closed | |
» | Hard Drive Interrupt is IRQ5 | W7 | pins 1 & 2 closed |
Hard Drive Interrupt is IRQ2 | W7 | pins 2 & 3 closed | |
» | Factory setting | W8 | pins 2 & 3 closed |
CO23 setting | W9 | pins 1 & 2 closed | |
» | Standard Configuration | W10 | pins 2 & 3 closed |
Special feature | W10 | pins 1 & 2 closed | |
» | Factory configured - do not alter | SW1/jumper 5 | open |
» | Factory configured - do not alter | SW1/jumper 6 | open |
» | Hard Drive Interrupt is IRQ5 | SW1/jumper 7 | open |
Hard Drive Interrupt is IRQ2 (JP7/pins 2-3 must be closed and a custom BIOS must be install) | SW1/jumper 7 | closed | |
» | AT mode enabled | SW1/jumper 8 | closed |
XT mode enabled | SW1/jumper 8 | open |
BIOS REVISION "SUPER BIOS" DRIVE TYPE TABLE | |||||||||
Drive 1 | Drive 0 | ||||||||
# | SW1/1 | SW1/2 | SW1/3 | SW1/4 | Cap. | Hds | Cyls. | WP | RWC |
0 | closed | closed | closed | closed | 21MB | 4 | 612 | 450 | 450 |
1 | open | closed | open | closed | 10MB | 4 | 306 | 0 | 153 |
2 | closed | open | closed | open | 10MB | 2 | 615 | 450 | 450 |
3 | open | open | open | open | 21MB | 4 | 615 | 450 | 450 |
BIOS REVISION "G" DRIVE TYPE TABLE | |||||||||
# | Drive 1 | Drive 0 | |||||||
# | SW1/1 | SW1/2 | SW1/3 | SW1/4 | Cap. | Hds. | Cyl. | WP | RWC |
0 | closed | closed | closed | closed | 20MB | 4 | 612 | 0 | none |
1 | open | closed | open | closed | 10MB | 2 | 612 | 128 | 128 |
2 | closed | open | closed | open | 20MB | 4 | 612 | 128 | none |
3 | open | open | open | open | 10MB | 4 | 306 | 0 | none |
BIOS REVISION "H" DRIVE TYPE TABLE JUMPERS 3, 4, & 8 CONFIGURE DRIVE 0 JUMPERS 1, 2 & 7 CONFIGURE DRIVE 1 | ||||||||
# | SW1/1 & 3 | SW1/2 & 4 | SW1/7 & 8 | Cap. | Hds | Cyl. | WP | RWC |
0 | closed | closed | closed | 42MB | 5 | 977 | none | none |
1 | open | closed | closed | 31MB | 5 | 733 | 300 | none |
2 | closed | open | closed | 33MB | 6 | 640 | none | none |
3 | open | open | closed | 62MB | 8 | 1024 | 1024 | 1024 |
4 | closed | closed | open | 42MB | 6 | 820 | none | none |
5 | open | closed | open | 10MB | 2 | 612 | 128 | 128 |
6 | closed | open | open | 20MB | 4 | 612 | 128 | none |
7 | open | open | open | 10MB | 4 | 306 | 0 | none |
MISCELLANEOUS TECHNICAL NOTES |
This controller can be purchased with several different BIOS revisions. The Super BIOS revision includes the following features not found in other revisions: ability to format bad tracks, dual controller operation, automatic configuration, virtual drive operation, and PC/AT compatibility. 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. |