
TIARA COMPUTER SYSTEMS, INC.

LanCard/A FO

NIC Type      ARCnet
Transfer Rate 2.5Mbps
Data Bus      8-bit ISA
Topology      Linear Bus
Wiring Type   200s
Boot ROM      Available

[Image]

                               NODE ADDRESS

  Node   SW2/1    SW2/2   SW2/3   SW2/4    SW2/5   SW2/6    SW2/7   SW2/8

   0       -       -        -       -       -        -       -        -

   1      Off      On      On      On       On      On       On      On

   2      On       On      On      On       On      On      Off      On

   3      On       On      On      On       On      On      Off      Off

   4      On       On      On      On       On      Off      On      On

  251     Off     Off      Off     Off     Off      On      Off      Off

  252     Off     Off      Off     Off     Off      Off      On      On

  253     Off     Off      Off     Off     Off      Off      On      Off

  254     Off     Off      Off     Off     Off      Off     Off      On

  255     Off     Off      Off     Off     Off      Off     Off      Off

  Note: Node address 0 is used for messaging between nodes and must not
  be used.

       A total of 255 node address settings are available. The switches
       are a binary representation of the decimal node addresses. Switch
       1 is the Least Significant Bit and switch 8 is the Most
       Significant Bit. The switches have the following decimal values:
       switch 1=1, 2=2, 3=4, 4=8, 5=16, 6=32, 7=64, 8=128. Turn off the
       switches and add the values of the off switches to obtain the
       correct node address. (On=0, off=1)

                            DIAGNOSTIC LED(S)

        LED               Status                    Condition

        L1                  On              Card is passing the token

        L1               Blinking             Card is reconfiguring

        L1                 Off           Card is resetting or inoperative

                             I/O BASE ADDRESS

   Address      SW1/1     SW1/2     SW1/3     SW1/4     SW1/5      SW1/6

      2E0h      Off       On        Off       Off       Off        On

       160h      On        Off        On       Off       Off        On

       1E0h      On        Off       Off       Off       Off        On

       260h      Off       On         On       Off       Off        On

       360h      Off       Off        On       Off       Off        On

       3E0h      Off       Off       Off       Off       Off        On

       Note: Some examples of possible settings are shown. The switches
       are a binary representation of the hexadecimal I/O addresses.
       Switch 6 is the Least Significant Bit and switch 1 is the Most
       Significant Bit. The switches have the following decimal values:
       switch 6=1h, 5=2h, 4=4h, 3=8h, 2=10h, 1=20h. Turn off the
       switches, add the values of the off switches, and multiply the
       total by 10h to obtain the correct I/O address. (On=0, Off=1)

                            BOOT CONFIGURATION

                 Setting                       SW2/9           SW2/10

    Boot from network, ignore bootable          On               On
          floppy or hard drives

   Try to boot from floppy drive A, then        On              Off
               the network

    Try to boot from hard drive C, then         Off             Off
               the network

   Try to boot from floppy drive A, then        Off              On
   from hard drive C, then the network

                        INTERRUPT REQUEST

    IRQ        JP1        JP2        JP3        JP4       JP5

     2        Open       Open       Open       Open      Closed

     3        Open       Open       Open      Closed      Open

     4        Open       Open      Closed      Open       Open

     5        Open      Closed      Open       Open       Open

     7       Closed      Open       Open       Open       Open

                             OPTIONAL 8253 TIMER INTERRUPT REQUEST

  IRQ    JP6     JP7      JP8      JP9      JP10    JP11     JP12     JP13     JP14     JP15

  2     Open     Open     Open     Open    Closed   Open     Open     Open     Open    Closed

  3     Open     Open     Open    Closed    Open    Open     Open     Open     Closed   Open

  4     Open     Open    Closed    Open     Open    Open     Open     Closed   Open     Open

  5     Open    Closed    Open     Open     Open    Open     Closed   Open     Open     Open

  7     Closed   Open     Open     Open     Open    Closed   Open     Open     Open     Open

                     RESPONSE/RECONFIGURATION TIMEOUTS

    Response Time      Reconfiguration Time       JP16           JP17

         74.7s               840s              Open           Open

          283.4s             1680s              Open          Closed

          561.8s             1680s             Closed          Open

         1118.6s             1680s             Closed         Closed

  Note: All NICs on the network must have this option set the same.

       RIM BUFFER, BOOT ROM, AND EXPANSION RAM ADDRESS CONFIGURATION

    Address         SW1/7          SW1/8         SW1/9         SW1/10

     Cxxxxh           On            On            Off            Off

     Dxxxxh           On            On            Off            On

     Exxxxh           On            On            On             On

  Note:This table represents the first digit of three seperate addresses,
  the rim bufffer address, the boot ROM
  x variables are configured for the three different addresses in the
  next three tables.

                      BOOT ROM ADDRESS CONFIGURATION

        Address               JP18             JP19             JP20

          x8000h             Open            Closed            Open

          Disabled            Open             Open             Open

           x4000h            Closed            Open             Open

           xC000h             Open             Open            Closed

                       EXPANSION SRAM CONFIGURATION

         Size               Address            JP21              W1

         Disabled          Disabled           Open             N/A

       2K x 8 (24pin)        x4000h           Closed         Pins 2 & 3
                                                               closed

       8K x 8 (28pin)        x4000h           Closed         PIns 1 & 2
                                                               closed

  Note:The manufacturer suggests the use of Hitatchi 6116 2K x 8 SRAM or
  Hitatchi 6264 8K x 8 SRAM chips. Most network software packages do not
  currently support the extra expansion memory.

                     RAM BUFFER ADDRESS CONFIGURATION

          Address                     JP22                   JP23

            x0000h                   Open                  Closed

             x4000h                  Closed                  Open

  Note: The RAM Buffer cannot be disabled.

