
JUKO LABORATORIES, LTD.

G7-B

Category                   Video
Video Types Supported      Monochrome, CGA, EGA
Video Processor            Juko
Highest Resolution         640 x 400
Supported
Data Bus Type              8-bit ISA
Memory Type                DRAM
Maximum Onboard Memory     256KB (location unknown)

[Image]

                                CONNECTIONS

        Purpose           Location           Purpose           Location

  9-pin video port          CN1       25-pin parallel port       CN8
                                      - internal

  Composite video jack      CN2       25-pin serial port -       CN9
                                      internal

  9-pin mouse port          CN3       25-pin serial port -       CN10
                                      internal

  6-pin light pen           CN5       Control cable              CN11
  connector                           connector - floppy
                                      drive

  16-pin game port          CN7

                  COMPOSITE COLOR DISPLAY CONFIGURATIONS

               Function                     Location          Setting

         Composite color selected             J1            Pins 1 & 2
                                                               closed

      Clock frequency is 14.31818 MHz         J3            Pins 1 & 2
                                                               closed

                                             J5/SW3          Pins 2 & 3
                                                               closed

         Composite color video mode          J5/SW4          Pins 2 & 3
                  selected                                     closed

                                             J5/SW5          Pins 1 & 2
                                                               closed

                COMPOSITE MONOCHROME DISPLAY CONFIGURATIONS

               Function                     Location          Setting

          Composite mono selected              J1            Pins 2 & 3
                                                               closed

      Clock frequency is 14.31818 MHz         J3            Pins 1 & 2
                                                               closed

                                             J5/SW3          Pins 2 & 3
                                                               closed

          Composite mono video mode          J5/SW4          Pins 1 & 2
                  selected                                     closed

                                             J5/SW5          Pins 2 & 3
                                                               closed

                        CGA DISPLAY CONFIGURATIONS

                Function                     Location         Setting

      Clock frequency is 14.31818 MHz          J3           Pins 1 & 2
                                                               closed

       Vertical synchronize pulse is         J5/SW1         Pins 1 & 2
                  positive                                     closed

      Horizontal synchronize pulse is        J5/SW2         Pins 1 & 2
                  positive                                     closed

                                              J5/SW3         Pins 1 & 2
                                                               closed

         CGA display mode selected           J5/SW4         Pins 2 & 3
                                                               closed

                                              J5/SW5         Pins 1 & 2
                                                               closed

                     MONOCHROME DISPLAY CONFIGURATIONS

                Function                     Location         Setting

          Clock frequency is 16MHz              J3           Pins 3 & 4
                                                               closed

        Vertical synchronize pulse is         J5/SW1         Pins 2 & 3
                  negative                                     closed

      Horizontal synchronize pulse is        J5/SW2         Pins 1 & 2
                  positive                                     closed

                                              J5/SW3         Pins 1 & 2
                                                               closed

         Mono display mode selected           J5/SW4         Pins 1 & 2
                                                               closed

                                              J5/SW5         Pins 1 & 2
                                                               closed

                  640 X 400 COLOR DISPLAY CONFIGURATIONS

               Function                    Location           Setting

      Clock frequency is 23.4MHz              J3             Pins 5 & 6
                                                              closed

     Vertical synchronize pulse is          J5/SW1           Pins 2 & 3
               negative                                       closed

    Horizontal synchronize pulse is         J5/SW2           Pins 2 & 3
               negative                                       closed

                                            J5/SW3           Pins 1 & 2
                                                              closed

   640 x 400 display mode selected          J5/SW4           Pins 1 & 2
                                                              closed

                                            J5/SW5           Pins 2 & 3
                                                              closed

                   MOUSE PORT (CN3) INTERRUPT SELECTION

               Setting                                 J2

                  IRQ2                         Pins 1 & 2 closed

                   IRQ3                         Pins 3 & 4 closed

                   IRQ4                         Pins 5 & 6 closed

                   IRQ5                         Pins 7 & 8 closed

                              MOUSE PORT MODE

                Setting                               J6/SW1

                  Enabled                       Pins 1 & 2 closed

                  Disabled                       Pins 2 & 3 closed

                          MOUSE PORT IRQ MATCHING

    Setting         J6/SW2         J6/SW3        J6/SW4         J6/SW5

       IRQ2       Pins 1 & 2    Pins 2 & 3     Pins 2 & 3    Pins 2 & 3
                    closed         closed        closed         closed

        IRQ3       Pins 2 & 3    Pins 1 & 2     Pins 2 & 3    Pins 2 & 3
                    closed         closed        closed         closed

        IRQ4       Pins 2 & 3    Pins 2 & 3     Pins 1 & 2    Pins 2 & 3
                    closed         closed        closed         closed

        IRQ5       Pins 2 & 3    Pins 2 & 3     Pins 2 & 3    Pins 1 & 2
                    closed         closed        closed         closed

                     PARALLEL PRINTER PORT (CN8) MODE

                Setting                               J4/SW1

                  enabled                       Pins 1 & 2 closed

                  Disabled                       Pins 2 & 3 closed

                           GAME PORT (CN7) MODE

                Setting                               J4/SW2

                  Enabled                       Pins 1 & 2 closed

                  Disabled                       Pins 2 & 3 closed

                       REALTIME CLOCK CONFIGURATIONS

               Function                     Location          Setting

         Clock assigned as timer 1            J7             Pins 1& 2
                 (340-35F)                                     closed

          Clock assigned as timer 2            J7            Pins 2 & 3
                 (240-25F)                                     closed

             Timer uses IRQ4                  J10           Pins 1 & 2
                                                               closed

              Timer uses IRQ4                  J10           Pins 3 & 4
                                                               closed

              Timer uses IRQ4                  J10           Pins 5 & 6
                                                               closed

              Timer uses IRQ4                  J10           Pins 7 & 8
                                                               closed

   SERIAL PORT 2 (CN9) CONFIGURATION

    ADDRESS/IRQ        J8        J9

   2F8-2FF/IRQ4      Closed    Closed

   Port disabled      Open      Open

  SERIAL PORT 1 (CN10) CONFIGURATION

    ADDRESS/IRQ        J11      J12

   3F8-3FF/IRQ4      Closed    Closed

   Port disabled      Open      Open

