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HCWDWX1

CMS ENHANCEMENTS, INC.

HCWDWX1

Data bus:

8-bit ISA

Size:

Half-length, full-height card

Hard drive supported:

Two MFM ST506/412 drives

Floppy drives supported:

None

CONNECTIONS

Function

Location

34-pin control cable connector - hard drive

J1

20-pin data cable connector - drive 0

J2

20-pin data cable connector - drive 1

J3

External power connector

J4

USER CONFIGURABLE SETTINGS

Function

Location

Setting

Factory configured - do not alter

J1/A

N/A

Factory configured - do not alter

J1/B

N/A

Factory configured - do not alter

J1/D

N/A

 

Controller supports up to 16 heads

W6

pins 1 & 2 closed

 

Controller supports up to 8 heads

W6

pins 2 & 3 closed

ADDRESS SELECT

I/O Address

Base Memory Address

W3

W4

W8

320 - 323h

C8000 - C9FFFh

closed

pins 2 & 3

pins 2 & 3

 

324 - 327h

CA000 - CBFFFh

closed

pins 1 & 2

pins 1 & 2

 

N/A

Disabled

open

N/A

N/A

Note: All pins designated should be placed in the closed position.

PRE-SELECTED DRIVE CONFIGURATIONS

     

First Drive

Second Drive

 

Capacity

Heads

Cylinders

J1/E

J1/F

J1/G

J1/H

10MB

4

306

open

open

open

open

 

21MB

4

612

closed

closed

closed

closed

 

10MB

2

612

open

closed

open

closed

 

21MB

4

612

closed

open

closed

open

INTERRUPT SELECT

IRQ

W7

J1/C

IRQ5

pins 1 & 2 closed

open

 

IRQ2

pins 2 & 3 closed

closed

Note: The location of jumper W7 is not identified in manufacturer documentation.