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