DATA TECHNOLOGY CORPORATION

DTC5280I, DTC7280

Data bus: 16-bit, ISA

Size: Full-length, full-height card

Hard drives supported: Two MFM ST506/412 drives

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

Interface: DTC5280i: 2:1

DTC7280: 1:1

[Image]

                            CONNECTIONS

                   Function                          Location

  34-pin control cable connector-floppy drive           J1

  34-pin data cable connector-hard drive                J2

  20-pin data cable connector-drive 0                   J3

  20-pin data cable connector-drive 1                   J4

  5-pin connector-drive active LED                      J5

                        USER CONFIGURABLE SETTINGS

                Function                     Location          Setting

  »   Initial floppy data transfer rate         W4              open
      is 500KHz

      Initial floppy data transfer rate         W4             closed
      is 250KHz

  »   Hardware drive select mode                W5             closed
      enabled

      Firmware drive select mode                W5              open
      enabled

  »   Auto-deselect enabled                     W6             closed

      Auto-deselect disabled                    W6              open

  »   Floppy drive precompensation is           W7              open
      scaled by data rate:

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

      Floppy drive precompensation is           W7             closed
      125ns

                          HARD DRIVE PORT ADDRESS

                Address                        W2               W3

  »   Port addresses are 1F0-1F7              open             open
      3F03F7h

      Port addresses are 170-177             closed           closed
      370377h