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

[Image]

                                CONNECTIONS

          Function             Label            Function           Label

  Unshielded twisted pair       CN1     RG-58A/U 50ohm coaxial      CN2
  port                                  port

                        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.