DATA TECHNOLOGY CORPORATION

DTC5280CL, DTC5280CRA, DTC5280CRZ

Data bus: 16-bit, ISA

Size: Full-length, full-height card

Hard drives supported: Two MFM ST506 drives

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

Sector interleave: 2:1

[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

  »   Auto-deselect disabled                    W1              open

      Auto-deselect enabled                     W1             closed

  »   Hard drive port addresses are           W2 & W3           open
      1F0-1F7 3F0-3F7h

      Hard drive port addresses are           W2 & W3          closed
      170-177 370-377h

  »   Floppy drive data transfer rate           W4              open
      is 500KHz

      Floppy drive data transfer rate           W4             closed
      is 250KHz

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

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

      Floppy drive precompensation is           W7             closed
      125ns

                             DRIVE SELECT MODE

               Function                      W5           W6/jumper 1 &
                                                           W6/jumper 2

  »   Firmware D.S. mode - Drv. #          closed       pins 2 & 3 closed
      driven to interface

      Firmware D.S. mode - Drv. #           open        pins 1 & 2 closed
      intercepted by controller

                MISCELLANEOUS TECHNICAL NOTES

  This controller has no onboard user accessible programs.