GENOA SYSTEMS CORPORATION

4850-5

Category                   Video
Video Types Supported      EGA
Video Processor            Unidentified
Highest Resolution         800 x 600
Supported
Data Bus Type              8-bit ISA
Memory Type                DRAM
Maximum Onboard Memory     256KB

[Image]

                                CONNECTIONS

        Purpose           Location           Purpose           Location

  Composite display          J1        9-pin digital video        J4
  jack                                 port

  Composite display          J2        32-pin feature             J5
  jack                                 connector

  Light pen connector        J3

                        CHIPSET

          Setting                      JMP1

    27128 chip installed     Pins 1 & 2, 4 & 5 closed

    27256 chip installed     Pins 2 & 3, 5 & 6 closed

                                I/O ADDRESS

               » Address                              JMP2

  »                3XXh                         Pins 2 & 3 closed

  »                2XXh                         Pins 1 & 2 closed

               MONITOR TYPE

       Setting                JMP3

         EGA           Pins 1 & 2 closed

  CGA or monochrome    Pins 2 & 3 closed

                         PRIMARY ADAPTER SETTINGS

     EGA          Mono          CGA       SW1/1    SW1/2   SW1/3   SW1/4

    40 x 25     Secondary       N/A        On      Off      Off      On
     text        adapter

    80 x 25     Secondary       N/A        Off     Off      Off      On
     text        adapter

  640 x 200     Secondary       N/A        On       On      On      Off
                 adapter

  640 x 350     Secondary       N/A        Off      On      On      Off
                 adapter

  Monochrome       N/A       Secondary     On      Off      On      Off
                             adapter 40
                               x 25

  Monochrome       N/A       Secondary     Off     Off      On      Off
                             adapter 80
                               x 25

                        SECONDARY ADAPTER SETTINGS

     EGA          Mono         CGA       SW1/1    SW1/2    SW1/3   SW1/4

    40 x 25      Primary       N/A        On       On       On       On
     text       adapter

    80 x 25      Primary       N/A        Off      On       On       On
     text       adapter

  640 x 200      Primary       N/A        On      Off       On       On
                adapter

  640 x 350      Primary       N/A        Off     Off       On       On
                adapter

  Monochrome      N/A         Primary     On       On      Off       On
                            adapter 40
                               x 25

  Monochrome      N/A         Primary     Off      On      Off       On
                            adapter 80
                               x 25

                           DISPLAY MODE SELECT

         Setting                  SW1/5                    SW1/6

  Standard/advanced EGA             On                      On

           CGA                     Off                      On

       Monochrome                  Off                      Off