
OLICOM INTERNATIONAL

OC-3109

NIC Type      Token-Ring
Transfer Rate 4Mbps
Data Bus      8-bit ISA
Topology      Ring
Wiring Type   Shielded twisted pair (DB-9 port)
Boot ROM      Available

[Image]

                             INTERRUPT REQUEST

   IRQ       SR3A       SR3B      SR3C       SR3D       SR3E       SR3F

     2     Closed      Open      Open       Open       Open       Open

      3      Open      Closed     Open       Open       Open       Open

      4      Open       Open     Closed      Open       Open       Open

      5      Open       Open      Open      Closed      Open       Open

      6      Open       Open      Open       Open      Closed      Open

      7      Open       Open      Open       Open       Open      Closed

                               CLOCK SELECT

                Setting                                SR6

              Onboard clock                    Pins 1 & 2 closed

              System bus clock                  Pins 2 & 3 closed

  Note:If the system's bus clock speed is greater than 8MHz the onboard
  clock must be enabled.

                               BOOT ROM SIZE

           Size                      SR11                   SR12

            8/16KB           Pins 1 & 2 closed       Pins 1 & 2 closed

              32KB            Pins 2 & 3 closed       Pins 1 & 2 closed

              64KB            Pins 2 & 3 closed       Pins 2 & 3 closed

                                 BOOT ROM

                Setting                                SR13

                 Disabled                       Pins 1 & 2 closed

                   Enabled                       Pins 2 & 3 closed

     PRIMARY/ALTERNATE SELECT, I/O BASE ADDRESS, AND BOOT ROM ADDRESS

        Setting           I/O Address        Boot ROM           SR14
                                             Address

         Primary        0A20 - 0A2Fh     D0000 - D7FFFh     Pins 1 & 2
                                                               closed

         Alternate       1A20 - 1A2Fh     D8000 - DFFFFh     Pins 2 & 3
                                                               closed

  Note:If two cards are to be used in a single system, one of the cards
  must be set to primary and the other must be set to alternate.

