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UNIVERSAL AT/XT CONTROLLER

CMS ENHANCEMENTS, INC.

UNIVERSAL AT/XT CONTROLLER

Data bus:

16-bit ISA

Size:

Half length, full-height card

Hard drive supported:

Two IDE(AT) interface drives

Floppy drives supported:

None

CONNECTIONS

Function

Location

40-pin IDE(AT) interface connector

J3

External power connector

J4

Replaceable controller chip

U2

Note: Chip U2 can be replaced with a U2 A/X-30 chip for compatibility with some PS-2 model 30 systems.

USER CONFIGURABLE SETTING

Function

Location

Setting

Factory configured - do not alter

SW1/1

N/A

Factory configured - do not alter

SW1/2

N/A

Controller enabled

SW1/3

on

 

Controller disabled

SW1/3

off

CMS drive C select

SW1/4

on

 

CMS drive D select

SW1/4

off

I/O address select 1F0 - 1F7h

SW1/7

on

 

I/O address select 170 - 177h

SW1/7

off

BASE MEMORY ADDRESS SELECT

Address

SW1/5

SW1/6

C8000h

off

off

 

D8000h

off

on

 

CC000h

on

off

 

DC000h

on

on

XT COMPATIBLE INTERRUPT CONFIGURATION

IRQ

SW1/8

IRQ5

on

 

IRQ2

off

AT COMPATIBLE INTERRUPT CONFIGURATION

IRQ

SW1/8

IRQ14

on

 

IRQ11

off