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