UNIDENTIFIED

H/FDC ADAPTER

Card Type

Hard drive controller

Hard Drives supported

Two IDE (AT) drives

Floppy drives supported

Two 360KB, 720KB, 1.2MB, 1.44MB

Data Bus

16-bit ISA

Card Size

Half-length, full-height

   

CONNECTIONS

Function

Label

Function

Label

34-pin cable connector - floppy drive

CN1

2-pin connector - drive active LED

J1

40-pin IDE(AT) connector

CN2

   

USER CONFIGURABLE SETTINGS

Function

Label

Position

»

One hard drive in system

J2

Open

 

Two hard drives in system

J2

Closed

»

IOCHRDY signal disabled

J3

Open

 

IOCHRDY signal enabled

J3

Closed

»

Host system acknowledges Interrupt status register

J4

Pins 1 & 2 closed

 

Host system ignores Interrupt status register

J4

Pine 2 & 3 closed

»

300KPS for DP8473 enabled

J5

Pins 1 & 2 closed

 

250KPS for DP8473 enabled

J5

Pins 2 & 3 closed

»

Proper precompensation value for DP8473 floppy drive enabled

J6

Pins 2 & 3 closed

 

Precompensation control for DP8473 floppy drive disabled

J6

Pins 1 & 2 closed

»

Floppy drive interface enabled

J7

Open

 

Floppy drive interface disabled

J7

Closed

»

IDE(AT) interface enabled

J8

Open

 

IDE(AT) interface disabled

J8

Closed

»

IDE primary address enabled

J9

Pins 2 & 3 closed

 

IDE secondary address enabled

J9

Pins 1 & 2 closed