WD1004A-WX1 (REV. A) Hard Disk/Floppy Controller Settings and Configuration
WESTERN DIGITAL CORPORATION
WD1004A-WX1 (REV. A)
Data bus: 8-bit, PC/AT, PC/AT
Size: Half-length, full-height card
Hard drives supported: Two MFM 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 connector-DC power | J4 |
4-pin connector-drive active LED | J5 |
I/O PORT & BIOS ADDRESS | ||||
I/O Port Address | BIOS Address | W21 | W22 | |
| » | 320-323h | C8000-C9FFFh | open | open |
324-327h | CA000-CBFFFh | closed | open | |
328-32Bh | CC000-CDFFFh | open | closed | |
32C-32Fh | CE000-CFFFFh | closed | closed | |
Note: The function of W17-W20 & W25-W28 is unidentified. | ||||
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. |
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