DATA TECHNOLOGY CORPORATION

DTC5287CR, DTC5287I, DTC7287

Data bus: 16-bit, ISA

Size: Full-length, full-height card

Hard drives supported: Two RLL ST506/412 drives with 17,32, or 60 sector
mapping

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

Sector interleave: DTC5287CR: 1:1

DTC5287i: 2:1

DTC7287: 1:1

[Image]

                           CONNECTIONS

                  Function                        Location

  34-pin data cable connector-floppy drive           J1

  34-pin control cable connector-hard drive          J2

  20-pin data cable connector-drive 0                J3

  20-pin data cable connector-drive 1                J4

  4-pin connector-drive active LED                   J5

                        USER CONFIGURABLE SETTINGS

                Function                     Location          Setting

  »   Floppy drive data transfer rate           W4              open
      is 500KHz

      Floppy drive data transfer rate           W4             closed
      is 250KHz

  »   Hardware drive select mode                W5             closed

      (drive number is driven directly
      to the interface)

      Firmware drive select mode                W5              open

      (drive number is intercepted by
      controller firmware)

  »   Auto-deselect enabled                     W6             closed

      Auto-deselect disabled                    W6              open

  »   Floppy drive precompensation              W7              open
      scaled by data rate:

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

      Floppy drive precompensation is           W7             closed
      125ns

  »   Factory configured - do not alter         W8             closed

  »   BIOS address is C800h                     W9              open

      BIOS address is D800h                     W9             closed

  »   BIOS enabled                              W10            closed

      BIOS disabled                             W10             open

                          HARD DRIVE PORT ADDRESS

                Address                        W2               W3

  »   Port addresses are 1F0-1F7              open             open
      3F2-3F7h

      Port addresses are 170-177             closed           closed
      372-377h