
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

