HwMuseum | Index

MULTI-TECH SYSTEMS, INC.

ISI502Q

Card Type

Serial controller

Chipset/Controller

16450/16550A

I/O Options

Serial ports (2)

Maximum DRAM

N/A

CONNECTIONS

Purpose

Location

Purpose

Location

Serial port 1

CN1

Serial port 2

CN2

PRIMARY PORT I/O ADDRESS SELECT

Address

SW1/1

SW1/2

SW1/3

SW1/4

SW1/5

SW1/6

SW1/7

SW1/8

»

2F8h

Off

On

On

On

On

Off

On

Off

 

3F8h

Off

On

On

On

On

On

On

Off

 

3E8h

Off

Off

On

On

On

On

On

Off

 

2E8h

Off

Off

On

On

On

Off

On

Off

SECONDARY PORT I/O ADDRESS SELECT

Address

SW1/1

SW1/2

SW1/3

SW1/4

SW1/5

SW1/6

SW1/7

SW1/8

»

2F0h

Off

On

On

On

On

Off

On

Off

 

3F0h

Off

On

On

On

On

On

On

Off

 

3E0h

Off

Off

On

On

On

On

On

Off

 

2E0h

Off

Off

On

On

On

Off

On

Off

PRIMARY SERIAL PORT INTERRUPT SELECT

IRQ

J2/A

J2/B

J2/C

J2/D

J2/E

»

IRQ4

Open

Open

Closed

Open

Open

 

IRQ3

Open

Closed

Open

Open

Open

 

IRQ2

Closed

Open

Open

Open

Open

 

IRQ5

Open

Open

Open

Closed

Open

 

IRQ7

Open

Open

Open

Open

Closed

SECONDARY SERIAL PORT INTERRUPT SELECT

IRQ

J1/A

J1/B

J1/C

J1/D

J1/E

»

IRQ5

Open

Open

Open

Closed

Open

 

IRQ3

Open

Closed

Open

Open

Open

 

IRQ4

Open

Open

Closed

Open

Open

 

IRQ2

Closed

Open

Open

Open

Open

 

IRQ7

Open

Open

Open

Open

Closed