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FOUR PORT

AST RESEARCH, INC.

FOUR PORT

Card Type

Serial

Chipset

Unidentified

I/O Options

Serial ports (4)

Data Bus

8-bit ISA

Card Size

Full height, half length

CONNECTIONS

Function

Label

Serial ports via DB-37 port

CN1

Note:Standard DB-25 serial ports are provided on an included adapter cable.

USER CONFIGURABLE SETTINGS

Setting

Label

Position

Interrupt sharing disabled

SW3/3

On

 

Interrupt sharing enabled

SW3/3

Off

Factory configured - do not alter

SW3/4

Off

INTERRUPT SELECTION

Setting

SW1/1

SW1/2

SW1/3

SW2/1

SW2/2

SW2/3

 

2

On

Off

Off

Off

Off

Off

 

3

Off

On

Off

Off

Off

Off

4

Off

Off

On

Off

Off

Off

 

5

Off

Off

Off

On

Off

Off

 

6

Off

Off

Off

Off

On

Off

 

7

Off

Off

Off

Off

Off

On

ADDRESS SELECTION

Port 1

Port 2

Port 3

Port 4

Control

SW3/1

SW3/2

1A0h

1A8h

1B0h

1B8h

1BFh

Off

Off

2A0h

2A8h

2B0h

2B8h

2BFh

Off

On

3F8h (COM1:)

2F8h (COM2:)

1B0h

1B8h

1BFh

On

Off

3F8h (COM1:)

2F8h (COM2:)

2B0h

2B8h

2BFh

On

On