MONOLITHIC SYSTEMS, INC. (COLORADO MSI)

MICROPAQ 451

  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

  10-pin serial port (COM1/3) - internal                  J3

  10-pin serial port (COM2/4) - internal                  J4

  4-pin connector - Drive active LED                      J5

  15-pin VGA port - external                              J6

  25-pin parallel port (LPT1/2/3) - external              J8

                        USER CONFIGURABLE SETTINGS

               Function                     Location          Setting

  »   Floppy drive enabled                 S1/switch 1           on

      Floppy drive disabled                S1/switch 1          off

  »   Floppy drive change signal           S1/switch 2           on
      sense enabled

      Floppy drive change signal           S1/switch 2          off
      sense disabled

  »   Single speed floppy drives           S1/switch 3          off
      supported

      Dual speed floppy drives             S1/switch 3           on
      supported

  »   Floppy drive precompensation is      S1/switch 4          off
      125ns

      Floppy drive precompensation is      S1/switch 4           on
      187ns

  »   VGA port enabled                     S2/switch 1           on

      VGA port disabled                    S2/switch 1          off

  »   16-bit video bus enabled             S2/switch 2          off

      8-bit video bus enabled              S2/switch 2           on

                        USER CONFIGURABLE SETTINGS

              Function                     Location           Setting

  »   Hard drive enabled                 S2/switch 4            on

      Hard drive disabled                S2/switch 4            off

  »   Pin 34 on IDE interface not        S2/switch 7            on
      grounded

      Pin 34 on IDE interface            S2/switch 7            off
      grounded

                SERIAL PORT 1 (J3) CONFIGURATION - S3

   Function     Switch 1      Switch 2      Switch 3      Switch 4

  COM1, IRQ4       on            off          off            on

  COM1, IRQ3       on            off           on           off

  COM3, IRQ4       off           on           off            on

  COM3, IRQ3       off           on            on           off

   Disabled        off           off          off           off

                SERIAL PORT 2 (J4) CONFIGURATION - S3

   Function     Switch 5      Switch 6      Switch 7      Switch 8

  COM2, IRQ4       on            off          off            on

  COM2, IRQ3       on            off           on           off

  COM4, IRQ4       off           on           off            on

  COM4, IRQ3       off           on            on           off

   Disabled        off           off          off           off

                   PARALLEL PORT (J8) CONFIGURATION - S4

          LPT               Switch 1        Switch 2          Switch 3

  »         LPT1              off              off              off

            LPT2              off              off               on

            LPT3              off              on               off

          Disabled            off              on                on

                 PARALLEL PORT (J8) INTERRUPT REQUEST - S4

             IRQ                    Switch 5               Switch 6

  »            IRQ7                    off                    on

               IRQ5                    on                    off

             Disabled                  off                   off

                        IDE IOCHRDY PIN SELECTION

             Function                  S2/switch 5         S2/switch 6

  »    IDE IOCHRDY from IDE pin 21          on                 off
       enabled

       IDE IOCHRDY from IDE pin 27         off                 on
       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.

                      MISCELLANEOUS TECHNICAL NOTES

  All other switches and jumpers are factory configured - do not alter.