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

<gopher://bitreich.org/I/th99/c/C-D/20256-1.png>
   

   +------------------------------------------------------------+
   |                        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 (Other  | JP10 and  |  open   |
   |   | sizes not  supported)            |   JP11    |         |
   |---+----------------------------------+-----------+---------|
   |>> | 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 Series |  open   | closed | open | open | closed | open |
   |-----------+---------+--------+------+------+--------+------|
   |  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     | ESDI | closed | closed | closed | closed |        |
   | Series |      |        |        |        |        |        |
   |--------+------+--------+--------+--------+--------+--------|
   | 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.)                                                |
   +------------------------------------------------------------+