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SYNCHRONOUS COMMUNICATIONS ADAPTER

DIGITAL COMMUNICATION ASSOCIATES, INC.

SYNCHRONOUS COMMUNICATIONS ADAPTER

Card Type

Serial controller

Chipset/Controller

Zilog 8085

I/O Options

Serial port

Maximum DRAM

N/A

CONNECTIONS

Purpose

Location

Serial port

CN1

I/O ADDRESS CONFIGURATION

Address

J2A

J2B

J2C

J2D

J2E

J2F

380h

Open

Open

Open

Open

Closed

Open

 

300h

Closed

Open

Open

Open

Open

Open

 

308h

Open

Closed

Open

Open

Open

Open

 

340h

Open

Open

Closed

Open

Open

Open

 

348h

Open

Open

Open

Closed

Open

Open

 

388h

Open

Open

Open

Open

Open

Closed

SLOT NUMBER & PC/XT SETTINGS

Setting

J1

Card in slot other than slot 8 on PC/XT

Pins 2 & 3 closed

 

Card in slot 8 of PC/XT

Pins 1 & 2 closed

INTERRUPT SELECT

IRQ

J5A

J5B

J5C

J5D

J5E

J5F

IRQ3

Open

Closed

Open

Open

Open

Open

 

IRQ2

Closed

Open

Open

Open

Open

Open

 

IRQ4

Open

Open

Closed

Open

Open

Open

 

IRQ5

Open

Open

Open

Closed

Open

Open

 

IRQ6

Open

Open

Open

Open

Closed

Open

 

IRQ7

Open

Open

Open

Open

Open

Closed

FACTORY CONFIGURED SETTINGS

Jumper

Setting

J3

Pins 1 & 2 closed

J4

Pins 1 & 2 closed