
OMNICOMP GRAPHICS CORPORATION

TIGA FOR THE TEXAN ET

Category                    Video
Video Types Supported       XVGA
Video Processor             TMS34020
Highest Resolution          1600 x 1280
Supported
Data Bus Type               16-bit ISA
Memory Type                 DRAM/VRAM
Maximum Onboard Memory      8MB/4MB

[Image]

                                CONNECTIONS

      Purpose          Location             Purpose            Location

  Red signal              CN1       Vertical sync                 CN5
  connector                         connector

  Green signal            CN2       Frequency connector           CN6
  connector

  Blue signal             CN3       VGA pass through              CN7
  connector                         connector

  Horizontal sync         CN4       Serial port(s)                CN8
  connector                         daughter-board
                                    connector

                        BASE I/O ADDRESS SELECTION

   Address      SW2/1     SW2/2     SW2/3     SW2/4     SW2/5      SW2/6

      300h      Off       Off       On         On        On        On

       200h      Off       On        On         On        On        On

       210h      Off       On        On         On        On        Off

       220h      Off       On        On         On       Off        On

       230h      Off       On        On         On       Off        Off

       240h      Off       On        On        Off        On        Off

       3B0h      Off       Off       Off        On       Off        Off

       3C0h      Off       Off       Off       Off        On        On

       3D0h      Off       Off       Off       Off        On        Off

       3E0h      Off       Off       Off       Off       Off        On

       3F0h      Off       Off       Off       Off       Off        Off

       Note: A total of 32 base address settings are available. The
       jumpers are a binary representation of the decimal memory
       addresses. Switch SW2/1 is the Most Significant Bit and switch
       SW2/6 is the Least Significant Bit. The switches have the
       following decimal values: switch SW2/1=512, SW2/2=256,
       SW2/3=128,SW2/4=64, SW2/5=32, SW2/6=16. Turn off the switches and
       add the values of the switches that are off to obtain the correct
       memory address. (Off=1, On=0)

                      VGA PASS THROUGH CONFIGURATION

                 Setting                               SW2/7

                  Enabled                              Off

                   Disabled                              On

       Note: If the VGA pass through connector is not connected to the
       board in the system, switch SW2/7 must be turned On.

  SYNC ON GREEN CONFIGURATION

    Setting          SW2/8

    Disabled           On

    Enabled           Off

              SELF TEST & DEMONSTRATION CONFIGURATION

        Setting                 SW1                   SW3/1

        Enabled                Press                    On

       Disabled         Only press one time            Off

                     POWER UP RESOLUTION CONFIGURATION

          Setting               SW3/2          SW3/3            SW3/4

      640 x 512 color            Off            Off              Off
       stereoscopic

   1024 x 960 interlaced         On             Off              Off
          Nucolor

      1024 x 1024 mono           Off             On              Off
       stereoscopic

     640 x 480 Nucolor           On              On              Off

     1280 x 1024 60Hz            Off            Off              On

     1600 x 1280 60Hz            On             Off              On

          EEPROM                 On              On              On

  Note: Stereoscopic and Nucolor modes refer to the Tektronix
  Stereoscopic and NuColor monitors.

                           DRAM MEMORY SELECTION

          Setting                    J3                      JP1

       1MB or 2MB DRAM             Open              Pins 1 & 2 closed

        4MB or 8MB DRAM            Closed             Pins 2 & 3 closed

                     EEPROM PROGRAMMING CONFIGURATION

               Setting                                 JP7

                  +12V                         Pins 2 & 3 closed

                    +5V                         Pins 1 & 2 closed

                       EEPROM POWER UP CONFIGURATION

                 Setting                                JP8

              Write protected                   Pins 1 & 2 closed

             Not write protected                 Pins 2 & 3 closed

                  1 & 2 MBIT EEPROM DEVICES CONFIGURATION

                Setting                                JP10

                  Enabled                       Pins 1 & 2 closed

                  Disabled                       Pins 2 & 3 closed

                            BUS TYPE SELECTION

                  Type                                  J1

                  16-bit                             Closed

                   8-bit                               Open

                             VPU CONFIGURATION

                 Setting                                JP2

            TMS34020 not halted                       Open

               TMS34020 halted                        Closed

                            INTERRUPT SELECTION

          IRQ                JP3              JP4               JP5

        Disabled            Open             Open             Open

            2/9           Pins 2 & 3          Open             Open
                            closed

             5            Pins 1 & 2          Open             Open
                            closed

            10               Open          Pins 2 & 3          Open
                                             closed

            11               Open          Pins 1 & 2          Open
                                             closed

            14               Open             Open           Pins 2 & 3
                                                              closed

            15               Open             Open           Pins 1 & 2
                                                              closed

        DRAM CONFIGURATION

      Size            Bank 0

       1MB        (1) 256K x 36

       2MB        (1) 512K x 36

       4MB         (1) 1M x 36

       8MB         (1) 2M x 36

                            VRAM CONFIGURATION

  Note: 2MB of the 4MB of VRAM on board is located on the back of the
  board.

  FACTORY CONFIGURED - DO NOT ALTER

      Jumper            Position

        J2                Open

        JP9               Open

                             DIAGNOSTIC LED(S)

    LED1      LED1 Status     LED2      LED2 Status        Condition
   Color                     Color

   Green          On          Red           On        DRAM or serial port
                                                      test initiated

   Green          On          Red          Off        VRAM test initiated

   Green         Off          Red          Off        RAMDAC or FPU test
                                                      initiated

   Green         Off          Red           On        GSP test initiated

   Green       Blinking       Red          Off        Test has passed

   Green         Off          Red        Blinking     Test has failed

