
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

