
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

  X680"h      On         On        On         Off

  XA80h      On         On        Off        On

  XE80h      On         On        Off        Off

  X6A0h     Off         On        On         Off

  XAA0h     Off         On        Off        On

  XEA0h     Off         On        Off        Off

  X6C0h      On        Off        On         Off

  XAC0h      On        Off        Off        On

  XEC0h      On        Off        Off        Off

  X6E0h     Off        Off        On         Off

  XAE0h     Off        Off        Off        On

  XEE0h     Off        Off        Off        Off

  X280h      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.

