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WD1007A-WA4

WESTERN DIGITAL CORPORATION

WD1007A-WA4

Data Bus

16-bit

Card Size

Full-length, full-height card

Hard Drives supported

Two ESDI drives

Sector Interleave

1:1

Floppy drives supported

Two 360KB or 720KB drives

CONNECTIONS

Function

Function

4-pin connector-drive active LED

J1

34-pin data cable connector-floppy drive

J5

20-pin data cable connector-drive 1

J2

9-pin serial port - external

J6

20-pin data cable connector-drive 0

J3

25-pin parallel port - external

J7

34-pin data cable connector-controller board

J4

 

 

USER CONFIGURABLE SETTINGS

Function

Label

Position

Primary floppy address 3FX

W1/pins 1 & 2

closed

 

Floppy controller disabled

W1/pins 2 & 3

closed

 

Secondary floppy address 37X

W1/pins 3 & 4

closed

Primary hard disk address 1FX

W2/pins 1 & 2

closed

 

Secondary hard disk address 17X

W2/pins 2 & 3

closed

Primary parallel port address 37X

W3/pins 1 & 2

closed

 

Parallel port disabled

W3/pins 2 & 3

closed

 

Secondary port address 27X

W3/pins 3 & 4

closed

Primary serial port address 3FX

W4/pins 1 & 2

closed

 

Serial port disabled

W4/pins 2 & 3

closed

 

Secondary serial port address 2FX

W4/pins 3 & 4

closed

Digital input register, non-latched

W9

open

 

Digital input register, latched

W9

closed

WD 1007 mode

W16/pins 1 & 2

open

 

WD 1005 mode

W16/pins 1 & 2

closed

Translation enabled

W16/pins 3 & 4

open

 

Translation disabled

W16/pins 3 & 4

closed

ECC correction, 4 bytes

W16/pins 5 & 6

open

 

ECC correction, 7 bytes

W16/pins 5 & 6

closed

BIOS ADDRESS SELECTION

Address

W13

W14

W15

C8000h-C9FFFh

N/A

Pins 2 & 3 closed

Pins 2 & 3 closed

 

CA000-CBFFFh

N/A

Pins 2 & 3 closed

Pins 1 & 2 closed

 

CC000-CDFFFh

N/A

Pins 1 & 2 closed

Pins 2 & 3 closed

 

CE00-CFFFh

Closed

Pins 1 & 2 closed

Pins 1 & 2 closed

 

BIOS disabled

Open

N/A

N/A

MISCELLANEOUS TECHNICAL NOTES

Note: This controller has a built-in low-level format program. To enter the program, run the BIOS routine through the DOS DEBUG utility and at the prompt enter: G=C800:5.