CMS ENHANCEMENTS, INC.

HCWDWX1

  Data bus:                  8-bit ISA

  Size:                      Half-length, full-height card

  Hard drive supported:      Two MFM ST506/412 drives

  Floppy drives supported:   None

[Image]

                              CONNECTIONS

                   Function                           Location

  34-pin control cable connector - hard drive            J1

  20-pin data cable connector - drive 0                  J2

  20-pin data cable connector - drive 1                  J3

  External power connector                               J4

                        USER CONFIGURABLE SETTINGS

                Function                    Location          Setting

  »   Factory configured - do not             J1/A              N/A
      alter

  »   Factory configured - do not             J1/B              N/A
      alter

  »   Factory configured - do not             J1/D              N/A
      alter

      Controller supports up to 16             W6            pins 1 & 2
      heads                                                    closed

      Controller supports up to 8              W6            pins 2 & 3
      heads                                                    closed

                              ADDRESS SELECT

    I/O Address        Base Memory         W3          W4          W8
                         Address

  »   320 - 323h     C8000 - C9FFFh      closed      pins 2 &    pins 2 &
                                                        3           3

      324 - 327h     CA000 - CBFFFh      closed      pins 1 &    pins 1 &
                                                        2           2

          N/A           Disabled          open         N/A         N/A

  Note: All pins designated should be placed in the closed position.

                     PRE-SELECTED DRIVE CONFIGURATIONS

                                       First    Second
                                      Drive     Drive

      Capacity   Heads    Cylinders    J1/E     J1/F      J1/G     J1/H

  »    10MB        4        306        open     open      open     open

       21MB        4        612       closed    closed   closed   closed

       10MB        2        612        open     closed    open    closed

       21MB        4        612       closed    open     closed    open

                             INTERRUPT SELECT

           IRQ                      W7                      J1/C

  »          IRQ5            pins 1 & 2 closed              open

             IRQ2            pins 2 & 3 closed             closed

  Note: The location of jumper W7 is not identified in manufacturer
  documentation.