HwMuseum | Index

DIGITAL COMMUNICATIONS ASSOCIATES, INC.

IRMA3 COMVERTIBLE

NIC Type

Ethernet

Network Transfer Rate

10Mbps

Data Bus

8-bit ISA/MCA

Topology

Linear Bus, Star

Wiring Type

Unshielded twisted pair

RG-58A/U 50ohm coaxial

Boot ROM

Not available

CONNECTIONS

Function

Label

Function

Label

Unshielded twisted pair port

CN1

RG-58A/U 50ohm coaxial port

CN2

USER CONFIGURABLE SETTINGS

Function

Label

Position

»

High sensitivity selected

JP2

Pins 1 & 2 closed

 

Low sensitivity selected

JP2

Pins 2 & 3 closed

BASE I/O ADDRESS SELECTION

Address

SW1/1

SW1/2

SW1/3

SW1/4

X’680"h

On

On

On

Off

X’A80’h

On

On

Off

On

X’E80’h

On

On

Off

Off

X’6A0’h

Off

On

On

Off

X’AA0’h

Off

On

Off

On

X’EA0’h

Off

On

Off

Off

X’6C0’h

On

Off

On

Off

X’AC0’h

On

Off

Off

On

X’EC0’h

On

Off

Off

Off

X’6E0’h

Off

Off

On

Off

X’AE0’h

Off

Off

Off

On

X’EE0’h

Off

Off

Off

Off

X’280’h

On

On

On

On

CABLE TYPE SELECTION

Type

JP1

»

RG-58A/U 50ohm coaxial

Pins 2 & 3 closed

 

Unshielded twisted pair

Pins 1 & 2 closed

MISCELLANEOUS TECHNICAL NOTES

Note: The backplate must be changed for MCA and for ISA.