CORE INTERNATIONAL, INC.

CNT-HCR CONTROLLER

Data bus: 16-bit, ISA

Size: Full-length, full-height card

Hard drives supported: Two MFM ST506/ST412 drives

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

Sector interleave: 1:1

Maximum heads/cyl.: 16 heads and 2048 cylinders

[Image]

                           CONNECTIONS

                  Function                        Location

  34-pin control cable connector-hard drive          CN2

  20-pin data cable connector-drive 0                CN3

  20-pin data cable connector-drive 1                CN4

  4-pin connector-drive active LED                   CN5

                          CONTROLLER POSITIONING

           Select                     JP18                   JP19

  »   First                           open                   open

      Second*                         open                  closed

      Third*                         closed                  open

      Fourth*                        closed                 closed

  Note:Up to four HCR controllers may be installed in a system

  *The BIOS must be disabled on all but the first HCR controller

                        USER CONFIGURABLE SETTINGS

               Function                    Location           Setting

  »   Sector size is 512 Bytes           JP10 and JP11          open
      (Other sizes not supported)

  »   Floppy drive enabled                   JP14               open

      Floppy drive disabled                  JP14              closed

  »   BIOS address is C8000h                 JP15               open

      (Controller initializes after
      POST)

      BIOS address is CA000h                 JP15              closed

      (Controller initializes during
      POST)

  »   BIOS enabled                           JP16               open

      BIOS disabled                          JP16              closed

  »   I/O Port address is 320h               JP17               open

      I/O Port address is 1A0h               JP17              closed

                        DRIVE CONFIGURATION JUMPERS

              Drv. 0       Drv. 1

                JP7          JP8        JP9      JP4      JP5       JP6

     HC        open        closed       open    open     closed     open
   Series

  AT Plus      open         open        open    open      open      open

   OPTIMA      open         open        open    open      open      open

                            DRIVE CONFIGURATION

   Model       Hds       Cyls      JP20       JP21      JP22       JP23

  HC Series    ESDI     closed    closed     closed    closed

  ATplus        5         924      open      closed     open       open
  40MB

  ATplus        5         988     closed      open      open      closed
  43MB

  ATplus        7         733      open      closed    closed      open
  44MB

  ATplus        9         924      open      closed     open      closed
  72MB

  ATplus        9        1072     closed      open      open       open
  80MB

  OPTIMA        5         963     closed      open     closed     closed
  40MB

  OPTIMA        7         733      open      closed    closed      open
  44MB

  OPTIMA        9         918     closed      open     closed      open
  70MB

  OPTIMA        9        1072     closed      open      open       open
  80MB

  Note:If an HC Series drive is being used with an ATplus or OPTIMA
  drive, the jumpers must be set for the latter and modifications to the
  data cable are required. If two ATplus or OPTIMA drives are used, they
  must be the same type.)