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

<gopher://bitreich.org/I/th99/c/C-D/20073-1.png>
   

   +------------------------------------------------------------+
   |                        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 3F2-3F7h |  open   |  open  |
   |---+-------------------------------------+---------+--------|
   |   | Port addresses are 170-177 372-377h | closed  | closed |
   +------------------------------------------------------------+