WDXT-GEN2, WDXT-GEN2 PLUS, WDXT-GEN2R Hard Disk/Floppy Controller Settings and Configuration
WESTERN DIGITAL CORPORATION
WDXT-GEN2, WDXT-GEN2 PLUS, WDXT-GEN2R
Data bus: 8-bit, PC/XT
Size: Half-length, full-height card
Hard drives supported: Two MFM ST506/412 drives (WDXT-GEN2/GEN2 PLUS)
Two RLL ST506/412 drives (WDXT-GEN2R)
Floppy drives supported: None
Maximum heads/cyl.: Maximum 8 heads and 1024 cylinders (WDXT-GEN2/GEN2 PLUS)
Maximum 15 heads and 1024 cylinders (WDXT-GEN2R)
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 (optional) | J4 |
4-pin connector-drive active LED | J5 |
SECTORS AND CONFIGURATION OPTIONS FOR RLL TABLE (WDXT-GEN2R) | |||||
Sectors | Translation | Dynamic | R25 | R26 | |
| » | 17 | yes | no | closed | open |
| » | 26 | no | yes | open | closed |
USER CONFIGURABLE SETTINGS | |||
Function | Location | Setting | |
| » | Internal BIOS selected | R23 | open |
| » | External BIOS selected | R23 | closed |
| » | Factory configured - do not alter (WDXT-GEN2/GEN2 PLUS) | R25 | open |
| » | Factory configured - do not alter (WDXT-GEN2/GEN2 PLUS) | R26 | open |
| » | IRQ5 select | R27 | open |
| » | IRQ2 select | R27 | closed |
| » | XT mode enabled | R28 | open |
| » | XT mode disabled | R28 | closed |
DRIVE TYPE CONFIGURATION (WDXT-GEN2/GEN2 PLUS) | ||||||||
Drive 0 | Drive 1 | |||||||
Table # | R17 | R18 | R19 | R20 | Capacity | Heads | Cyls. | |
| » | 3 | open | open | open | open | 21MB | 4 | 615 |
0 | closed | closed | closed | closed | 21MB | 4 | 612 | |
1 | open | closed | open | closed | 10MB | 4 | 306 | |
2 | closed | open | closed | open | 10MB | 2 | 615 | |
DRIVE TYPE CONFIGURATION (WDXT-GEN2R) | ||||||||
Drive 0 | Drive 1 | |||||||
Table # | R17 | R18 | R19 | R20 | Capacity | Heads | Cyls. | |
| » | 3 | open | open | open | open | 32MB | 4 | 615 |
0 | closed | closed | closed | closed | 65MB | 6 | 820 | |
1 | open | closed | open | closed | 42MB | 4 | 782 | |
2 | closed | open | closed | open | 21MB | 2 | 782 | |
ADDRESS SELECTION | ||||
Controller Address | BIOS Address | R21 | R22 | |
| » | 320-323h | C8000-C9FFFh | open | open |
324-327h | CA000-CBFFFh | closed | open | |
328-32Bh | CC000-CDFFFh | open | closed | |
32C-32Fh | CE000-CFFFFh | closed | closed | |
MISCELLANEOUS TECHNICAL NOTES |
The controller has a built-in low level format. To enter the program run the DEBUG utility supplied with DOS and at the prompt enter: G=C800:5 |
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