WESTERN DIGITAL CORPORATION
WD1007A-WAH, WD1007A-WA2
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Data bus: 16-bit, PC/AT
Size: Full-length, full-height card
Hard Drives Supported: Two ESDI drives
Floppy drives supported: WD1007A-WA2: Two 360KB, 720KB, 1.2MB, or 1.44MB
WD1007A-WAH: None
Sector interleave: 1:1
Options: Feature F301R has an optional ROM BIOS with shadow RAM enabling the controller to interface with all types of ESDI drives by bypassing the systems ROM BIOS drive type tables. Feature F300R does not include ROM BIOS option and system ROM BIOS must contain appropriate drive parameters.
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CONNECTIONS | |
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Function |
Location |
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34-pin control cable connector-hard drive |
J1 |
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20-pin data cable connector-drive 0 |
J2 |
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20-pin data cable connector-drive 1 |
J3 |
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34-pin data cable connector-floppy drive |
J4 |
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4-pin connector-drive active LED |
J5 |
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MISCELLANEOUS TECHNICAL NOTES |
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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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USER CONFIGURABLE SETTINGS | |||
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Function |
Location |
Setting | |
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BIOS shadow RAM enabled |
W1 |
closed | |
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BIOS shadow RAM disabled |
W1 |
open | |
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Floppy controller enabled (WD1007A-WA2 only) |
W4 |
open | |
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Floppy controller disabled (WD1007A-WA2 only) |
W4 |
closed | |
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Single speed floppy drive select (WD1007A-WA2 only) |
W5 |
open | |
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Dual speed floppy drive select (WD1007A-WA2 only) |
W5 |
closed | |
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Floppy drive port address is 3F0-3F7h |
W6 |
pins 2 & 3 closed | |
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Floppy drive port address is 370-377h |
W6 |
pins 1 & 2 closed | |
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WD1007A-WA2 supports 5.25 & 3.5 floppy drives |
W7 |
closed | |
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WD1007 emulation mode |
W8 |
open | |
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WD1005 emulation mode |
W8 |
closed | |
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Chassis ground disconnected |
W9 |
open | |
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Digital ground disconnected |
W9 |
pins 1 & 2 closed | |
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Chassis ground connected |
W9 |
pins 2 & 3 closed | |
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Digital input register unlatched |
W10 |
open | |
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Digital input register latched |
W10 |
closed | |
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Diskette change input signal enabled (WD1007A-WA2 only) |
W11 |
closed | |
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Diskette change input signal disabled (WD1007A-WA2 only) |
W11 |
open | |
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Hard drive port address is 1F0-1F7h |
W12 |
open | |
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Hard drive port address is 170-177h |
W12 |
closed | |
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Floppy controller enabled (In etch)(WD1007A-WA2 only) |
W13 |
uncut | |
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Floppy controller disabled (In etch)(WD1007A-WA2 only) |
W13 |
cut | |
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Sector translation enabled |
W14 |
open | |
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Sector translation disabled |
W14 |
closed | |
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ECC length is 4 bytes |
W15 |
open | |
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ECC length is 7 bytes |
W15 |
closed | |
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BIOS ADDRESS | ||||
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Address |
W1 |
W2 |
W3 | |
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C8000-C9FFFh |
pins 2 & 3 closed |
pins 2 & 3 closed |
closed | |
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CA000-CBFFFh |
pins 2 & 3 closed |
pins 1 & 2 closed |
closed | |
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CC000-CDFFFh |
pins 1 & 2 closed |
pins 2 & 3 closed |
closed | |
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CE000-CFFFFh |
pins 1 & 2 closed |
pins 1 & 2 closed |
closed | |