
MONOLITHIC SYSTEMS, INC. (COLORADO MSI)

MICROPAQ 452 REV. B

  Data bus:                  16-bit, ISA

  Size:                      Full-length, full-height card

  Hard drive supported:      Two IDE (AT) Interface drives

  Floppy drives supported:   Two 360KB, 720KB, 1.2MB, or 1.44MB drives

[Image]

                              CONNECTIONS

                    Function                           Location

  40-pin IDE(AT) Interface connector                      J1

  34-pin control cable connector - floppy drive           J2

  26-pin parallel port (LPT1/2/3) - internal              J3

  10-pin serial port 1 (COM1/2/3/4) - internal            J4

  10-pin serial port 2 (COM1/2/3/4) - internal            J5

  4-pin connector - Drive active LED                      J6

  28-pin VESA(VGA) feature connector - internal           J7

  26-pin VESA(EGA) feature connector - internal           J11

  15-pin analog VGA port - external                       J13

  9-pin digital EGA port- external                        J21

                        USER CONFIGURABLE SETTINGS

                Function                     Location         Setting

     Pin 34 on IDE interface grounded         J10             closed

      Pin 34 on IDE interface not              J10              open
      grounded

     Floppy drive precompensation is          J12              open
      125ns

      Floppy drive precompensation is          J12             closed
      187ns

     Hard drive enabled                       J14             closed

      Hard drive disabled                      J14              open

     On-board video enabled                   J15             closed

      On-board video disabled                  J15              open

     Floppy drive Interrupt IRQ6              J16             closed
      enabled

      Floppy drive Interrupt IRQ6              J16              open
      disabled

                        USER CONFIGURABLE SETTINGS

               Function                    Location           Setting

     Single speed floppy drives              J17              open
      supported

      Dual speed floppy drives                J17             closed
      supported

     16-bit video bus enabled                J18              open

      8-bit video bus enabled                 J18             closed

     Floppy drive change signal              J19             closed
      sense enabled

      Floppy drive change signal              J19              open
      sense disabled

     VGA clock enabled (normal               J22            pins 1 & 2
      operation)                                              closed

      Feature connector clock                 J22            pins 2 & 3
      enabled                                                 closed

     Hard drive Interrupt IRQ14              J24             closed
      enabled

      Hard drive Interrupt IRQ14              J24              open
      disabled

                        IDE IOCHRDY PIN SELECTION

                 Function                        J8              J9

      IDE IOCHRDY from IDE pin 21               off             on
       enabled

       IDE IOCHRDY from IDE pin 27               on              off
       enabled

       Pin 21 setting is for Seagate, CDC, Imprimis, and Miniscribe hard
       drives. Pin 27 setting is for Quantum hard drives. Conner and WD
       hard drives ignore the setting of these switches.

                        SERIAL PORT 1 CONFIGURATION

       COM         S1/switch 1   S1/switch 2   S1/switch 3   S1/switch 4

         1            on            off           off           off

          2            off           on            off           off

          3            off           off           on            off

          4            off           off           off            on

      Disabled         off           off           off           off

                   SERIAL PORT 1 (J4) INTERRUPT REQUEST

            IRQ                  S1/switch 5             S1/switch 6

              3                      on                     off

               4                     off                     on

            Disabled                 off                     off

                   PARALLEL PORT (J3) CONFIGURATION - S2

         LPT            S2/switch 1       S2/switch 2       S2/switch 3

           1                on               off               off

            2               off               on                off

            3               off               off               on

         Disabled           off               off               off

                   PARALLEL PORT (J3) INTERRUPT REQUEST

            IRQ                  S2/switch 5             S2/switch 6

              7                     off                     on

               5                      on                     off

            Disabled                 off                     off

                        SERIAL PORT 2 CONFIGURATION

       COM         S3/switch 1   S3/switch 2   S3/switch 3   S3/switch 4

         1            on            off           off           off

          2            off           on            off           off

          3            off           off           on            off

          4            off           off           off            on

      Disabled         off           off           off           off

                   SERIAL PORT 2 (J5) INTERRUPT REQUEST

            IRQ                  S3/switch 5             S3/switch 6

              4                     off                     on

               3                      on                     off

            Disabled                 off                     off

                       VIDEO DISPLAY CONFIGURATION

   Primary Adapter        Secondary     JP20   S4/1    S4/2   S4/3   S4/4
                          Adapter

       *Monochrome     EGA w/CGA 40 x    1 &    on     on     on     on
                             25          2

       *Monochrome     EGA w/CGA 80 x    1 &   off     on     on     on
                             25          2

       *Monochrome      EGA w/EGA 200    1 &    on     off    on     on
                            line         2

       *Monochrome      EGA w/EGA 350    1 &   off     off    on     on
                            line         2

       *CGA 40 x 25          EGA         2 &    on     on     off    on
                        w/monochrome     3

       *CGA 80 x 25          EGA         2 &   off     on     off    on
                        w/monochrome     3

      EGA w/CGA 40 x   *Monochrome or    1 &    on     off    off    on
            25              none         2

      EGA w/CGA 80 x   *Monochrome or    1 &   off     off    off    on
            25              none         2

       EGA w/EGA 200   *Monochrome or    1 &    on     on     on     off
           line             none         2

      EGA w/EGA 350   *Monochrome or    1 &   off     on     on     off
           line             none         2

            EGA         *CGA 40 x 25     2 &    on     off    on     off
       w/monochrome       or none        3

            EGA         *CGA 80 x 25     2 &   off     off    on     off
       w/monochrome       or none        3

        VGA enable     S4/switch 5 on
        (all other
           modes
        disabled)

         All other       S4/switch 5
       modes enable         off
         (VGA mode
        disabled)

      For JP20 pins designated should be in a closed position.

      When VGA mode is enabled, the settings of JP20 and S4/switch 1 - 4
      are ignored.

      The options with a (*) in front of them require an add-on card to
      function.

                       MISCELLANEOUS TECHNICAL NOTES

  The function of S2/switch 4 is undocumented.

  All other jumpers are for factory tests and should remain
  factory-configured.

