CORE INTERNATIONAL, INC.

CNT-AT2

Data bus: 16 bit, ISA

Size: Full-length, full-height card

Hard drives supported: Two ESDI drives

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

Maximum heads/cyl.: 16 heads and 2048 cylinders

[Image]

                           CONNECTIONS

                  Function                        Location

  34-pin data cable connector-floppy drive           CN1

  20-pin data cable connector-drive 1                CN3

  20-pin data cable connector-drive 0                CN4

  34-pin control cable connector-hard drive          CN5

  4-pin connector-drive active LED                   CN6

                       MISCELLANEOUS TECHNICAL NOTES

    Jumpers JP1, JP2, JP3, JP4, and JP7 are Factory configured - do not
                                  alter.

                   Jumper JP6, pins 2 & 3, are Not used.

                        USER CONFIGURABLE SETTINGS

              Function                     Location           Setting

  »   Cache enabled                          JP4A               open

      Cache disabled                         JP4A              closed

  »   32KB data buffer                        JP5            pins 1 & 2
      configuration                                            closed

      8KB data buffer configuration           JP5            pins 2 & 3
                                                               closed

  »   8/32KB data buffer                      JP6            pins 1 & 2
      configuration                                            closed

  »   Supports a third floppy (DS2)      JP11/jumper 1          open
      on a twisted cable

      Supports a third floppy (DS4)      JP11/jumper 1         closed
      on a straight cable

  »   Floppy drive 1 is configured       JP11/jumper 2          open
      as AT type.

      Floppy drive 1 is configured       JP11/jumper 2         closed
      as PS/2 type.

  »   Floppy drive 0 is configured       JP11/jumper 3          open
      as AT type.

      Floppy drive 0 is configured       JP11/jumper 3         closed
      as PS/2 type.

  »   Floppy drive port address          JP11/jumper 4          open
      3F0-3F7h

      Floppy drive port address          JP11/jumper 4         closed
      370-377h

  »   Single-speed floppy supported      JP11/jumper 5          open

      Dual-speed floppy supported        JP11/jumper 5         closed

  »   Floppy drive Precomp. is           JP11/jumper 6          open
      scaled by data rate:

      500KHz=125ns, 300KHz=208ns,
      250KHz=250ns

      Precomp. fixed at 125ns for        JP11/jumper 6         closed
      all data rates.

  »   Hard drive port address                JP12               open
      1F0-1F7h

      Hard drive port address                JP12              closed
      170-177h

  »   Chassis ground is connected            JP16              closed
      to logic ground

      Chassis ground is not                  JP16               open
      connected to logic ground

  »   Floppy controller enabled              JP17              closed

      Floppy controller disabled             JP17               open

  »   Hard Drive Interrupt is IRQ14          JP20            pins 2 & 3
                                                               closed

      Hard Drive Interrupt is IRQ15          JP20            pins 1 & 2
                                                               closed

                               BIOS ADDRESS

      Address         JP10/jumper 1     JP10/jumper 2     JP10/jumper 3

        Disabled          open              open               open

  »      C800h            open              open              closed

         CC00h            open             closed              open

         D000h            open             closed             closed

         D400h           closed             open               open

         D800h           closed             open              closed

         DC00h           closed            closed              open

        Disabled         closed            closed             closed