EVEREX SYSTEMS, INC.

MICROENHANCER EV-659A

Category                 Video
Video Types Supported    CGA/EGA/Monochrome
Video Processor          Unidentified
Highest Resolution       640 x 350
Supported
Data Bus Type            8-Bit ISA
Memory Type              DRAM
Maximum Onboard Memory   256KB (Exact location of memory is unidentified)

[Image]

                                CONNECTIONS

       Purpose          Location            Purpose            Location

  RCA Jack                 J1         15-pin analog video         P2
                                      port

  RCA Jack                 J2         VGA feature connector       P3

                       VIDEO PORT ADDRESS SELECTION

               Address                                 W5

  »                3xx                         Pins 2 & 3 closed

                   2xx                         Pins 1 & 2 closed

                       VIDEO EMULATION CONFIGURATION

         Setting                Autoswitch         SW1/5         SW1/6

  »    Hercules emulation        Disabled           Off           Off
           disabled

       Hercules emulation        Enabled             On           On
            enabled

                         MONITOR TYPE CONFIGURATION

      Type           Mode      SW1/1   SW1/2   SW1/3   SW1/4   SW1/7   SW1/8

  »      EGA       EGA 80 x     Off     On      On     Off      On      On
                      25

         EGA       CGA 80 x     On      On      On     Off      On      On
                      25

         CGA       CGA 80 x     Off     Off     Off     On      On     Off
                      25

         CGA       CGA 40 x     On      Off     Off     On      On     Off
                      25

      Monochrome  Monochrome    Off     Off     On     Off     Off     Off

                           VIDEO INTERRUPT SELECTION

       IRQ        W12/1    W12/2    W12/3    W12/4    W12/5    W12/6    W12/7

  »      Non      Closed    Open     Open     Open    Open     Open     Open
       Maskable
      Interrupt

          2        Open    Closed    Open     Open    Open     Open     Open

          3        Open     Open    Closed    Open    Open     Open     Open

          4        Open     Open     Open    Closed   Open     Open     Open

          5        Open     Open     Open     Open    Closed   Open     Open

          6        Open     Open     Open     Open    Open     Closed   Open

          7        Open     Open     Open     Open    Open     Open     Closed

                       INTERRUPT TYPE CONFIGURATION

                  Type                                  W6

  »             Non Maskable                     Pins 2 & 3 closed

                   Normal                        Pins 1 & 2 closed

    FACTORY CONFIGURED - DO NOT ALTER

       Jumper              Position

         W8           Pins 1 & 2 closed

         W11                 Open