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WDAT-440 Hard Disk/Floppy Controller Settings and Configuration






WESTERN DIGITAL CORPORATION

WDAT-440

Data bus: 16-bit, PC/AT

Size: Half-length, full-height card

Hard drives supported: Two IDE (AT) Interface drives

Floppy drives supported: Two 360KB, 720KB, 1.2MB, or 1.44MB

Special features: Two serial and one parallel port

CONNECTIONS

Function

Location

34-pin data cable connector-floppy drive

J1

25-pin parallel port-external

J2

40-pin IDE (AT) Interface control cable connector-internal

J5

4 pin connector drive- active LED

J6

9-pin serial port-external

J8

DIRQ14 SIGNAL SELECT

DIRQ

W3

W3

DIRQ14 signal passed to host computer

pins 1 & 2 open

pins 2 & 3 closed

 

Conner CP342/CP3022 in true IBM AT

pins 1 & 2 closed

pins 2 & 3 open

WESTERN DIGITAL CORPORATION

WDAT-440

USER CONFIGURABLE SETTINGS

Function

Location

Setting

Floppy controller enabled

W4

closed

 

Floppy controller disabled

W4

open

Floppy drive port address is 3F0-3F7h

W4

open

 

Floppy drive port address is 370-377h

W4

closed

Single speed floppy drive

W5

open

 

Dual speed floppy drive

W5

closed

Logic ground independent of chassis

W6

open

 

Logic ground connected to chassis

W6

closed

Printer Interrupt is IRQ7

W7

pins 3 & 4 closed

 

Printer Interrupt is IRQ5

W7

pins 1 & 2 closed

COM2 Interrupt is IRQ3

W7

pins 5 & 6 closed

 

COM2 Interrupt is IRQ4

W7

pins 5 & 7 closed

 

COM1 Interrupt is IRQ3

W7

pins 6 & 8 closed

 

COM1 Interrupt is IRQ4

W7

pins 7 & 8 closed

Printer enabled

W8/jumper 1

closed

 

Printer disabled

W8/jumper 1

open

Printer address, LPT1 = 378-37Fh

W8/jumper 2

open

 

Printer address, LPT2 = 278-27Fh

W8/jumper 2

closed

External Serial Port = COM1 (3F8-3FFh)

W8/jumper 3

closed

 

External Serial Port = COM3 (3E8-3EFh)

W8/jumper 4

closed

Internal Serial Port = COM2 (2F8-2FFh)

W8/jumper 5

closed

 

Internal Serial Port = COM4 (2E8-2EFh)

W8/jumper 6

closed

Enable intelligent drive interface

W9

closed

 

Disable intelligent drive interface

W9

open








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