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MS-422

DIAMOND FLOWER, INC.

MS-422

Card Type

Multi I/O card

Chipset/Controller

UMC82450

I/O Options

Serial ports (2)

Maximum DRAM

N/A

CONNECTIONS

Purpose

Location

Purpose

Location

Serial port 1

CN1

Protective/ground connector

JP9

Serial port 2

CN2

   

SERIAL PORT CONFIGURATION

Port 1 (CN1)

Port 2 (CN2)

SW1/1

SW1/2

COM1

COM2

Off

Off

 

COM1

Disabled

On

Off

 

COM2

COM3

Off

On

 

COM3

COM4

On

On

SERIAL PORT INTERRUPT SELECT

Port 1 (CN1)

Port 2 (CN2)

SW1/3

SW1/4

SW1/5

SW1/6

IRQ4

IRQ3

On

Off

Off

On

 

IRQ3

IRQ4

Off

On

On

Off

 

Disabled

Disabled

Off

Off

Off

Off

RS-422 DRIVER SELECT

Port 1 (CN1)

Port 2 (CN2)

JP1

JP2

Controlled by RTS

Controlled by RTS

Pins 1 & 2 closed

Pins 1 & 2 closed

Always on

Always on

Open

Open

Always Off

Always Off

Pins 2 & 3 closed

Pins 2 & 3 closed

RS-422/232 SELECT

Port 1 (CN1)

Port 2 (CN2)

JP4

JP3

RS-422

RS-422

Pins 1 & 2 closed

Pins 1 & 2 closed

RS-422

RS-232

Pins 1 & 2 closed

Pins 2 & 3 closed

RS-232

RS-422

Pins 2 & 3 closed

Pins 1 & 2 closed

RS-232

RS-232

Pins 2 & 3 closed

Pins 2 & 3 closed

PORT DIAGNOSTIC MODE

Port 1 (CN1)

Port 2 (CN2)

JP7

JP8

Normal operation

Normal operation

Pins 1 & 2 closed

Pins 1 & 2 closed

 

IBM diagnostic test

IBM diagnostic test

Pins 2 & 3 closed

Pins 2 & 3 closed