IBM CORPORATION

EASY OPTIONS PROFESSIONAL AUDIO CARD AC523, EASY OPTIONS SOUND CARD CD651

Card Type

Sound card

Chip Set

Unidentified

Maximum Onboard Memory

N/A

I/O Options

Audio extension connector, CD-ROM audio, CD-ROM interface, game/MIDI port, line in, microphone in, MIDI extension connector, PC speaker, speaker out, volume

Data Bus

16-bit ISA

Floppy drives supported

N/A

CONNECTIONS

Function

Label

Function

Label

Game/MIDI port

CN1

MIDI extension connector

CN6

Audio extension connector

CN2

Line in

J1

CD-ROM interface

CN3

Mic in

J2

PC speaker

CN4

Speaker out

J3

CD - audio in

CN5

Volume

VR1

USER CONFIGURABLE SETTINGS

Function

Label

Position

»

Game port enabled

JYEN

Closed

 

Game port disabled

JYEN

Open

»

MIDI base address is 330h

MSEL

Closed

 

MIDI base address is 300h

MSEL

Open

AUDIO BASE I/O ADDRESS SELECTION

Address

IOS0

IOS1

»

220h

Closed

Closed

 

240h

Open

Closed

 

260h

Closed

Open

 

280h

Open

Open

INTERRUPT SELECTION

IRQ

IS0

IS1

 

2/9

Closed

Closed

»

5

Open

Closed

 

7

Closed

Open

 

10

Open

Open

8-BIT DMA CHANNEL SELECTION

Channel

DAS0

DAS1

 

0

Closed

Closed

»

1

Open

Closed

 

3

Closed

Open

16-BIT DMA CHANNEL SELECTION

Channel

DBS0

DBS1

»

5

Closed

Closed

 

6

Open

Closed

 

7

Closed

Open

AUDIO INTERNAL AMPLIFIER CONFIGURATION

Setting

OPSL

OPSR

 

Disabled

Pins 1 & 2 closed

Pins 1 & 2 closed

»

Enabled

Pins 2 & 3 closed

Pins 2 & 3 closed