DATA TECHNOLOGY CORPORATION
===========================

   DTC6180-15TX, DTC6280-15TX

   +------------------------------------------------------------+
   +------------------------------------------------------------+

   Data bus: 16-bit, ISA

   Size: Full-length, full-height card

   Hard drives supported:  Two ESDI RLL drives with 17,32, or 60
   sector mapping

   Floppy drives supported: DTC6180-15TX: None

   DTC6280-15TX: Four 360KB, 720KB, 1.2MB, 1.44MB

   Sector interleave: 1:1

<gopher://bitreich.org/I/th99/c/C-D/20075-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |                    Function                     | Location |
   |-------------------------------------------------+----------|
   | 34-pin data cable connector-floppy drive        |    J1    |
   | (DTC6280-15TX only)                             |          |
   |-------------------------------------------------+----------|
   | 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 SETTTINGS - DTC6X80-15TX         |
   |------------------------------------------------------------|
   |              Function              | Location |  Setting   |
   |------------------------------------+----------+------------|
   |>> | Reserved for Floppy precomp    |    W1    |    open    |
   |---+--------------------------------+----------+------------|
   |>> | Wait state disabled            |    W2    |    open    |
   |---+--------------------------------+----------+------------|
   |   | Wait state enabled             |    W2    |   closed   |
   |---+--------------------------------+----------+------------|
   |>> | BIOS SRAM is 8Kx8 (6264)       |    W3    | pins 1 & 2 |
   |   |                                |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | BIOS  SRAM is 2Kx8 (6116)      |    W3    | pins 2 & 3 |
   |   | (Hard-wired)                   |          |   closed   |
   |---+--------------------------------+----------+------------|
   |>> | Track buffer size is 32Kx8     |    W4    | pins 1 & 2 |
   |   | SRAM                           |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | Track buffer size is 8Kx8 SRAM |    W4    | pins 2 & 3 |
   |   |                                |          |   closed   |
   |---+--------------------------------+----------+------------|
   |>> | Hard Drive Interrupt is IRQ14  |    W5    | pins 1 & 2 |
   |   |                                |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | Hard Drive Interrupt is IRQ15  |    W5    | pins 2 & 3 |
   |   |                                |          |   closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                BIOS ADDRESS - DTC6180-15TX                 |
   |------------------------------------------------------------|
   |     Address      |    SW1/switch 5    |    SW1/switch 6    |
   |------------------+--------------------+--------------------|
   |>> |    C8000h    |        off         |        off         |
   |---+--------------+--------------------+--------------------|
   |   |    D8000h    |         on         |        off         |
   |---+--------------+--------------------+--------------------|
   |   |    D0000h    |        off         |         on         |
   |---+--------------+--------------------+--------------------|
   |   |    D4000h    |         on         |         on         |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |         USER CONFIGURABLE SETTINGS - DTC6280-15TX          |
   |------------------------------------------------------------|
   |             Function              |   Location   | Setting |
   |-----------------------------------+--------------+---------|
   |>> | Floppy drive data transfer    | SW1/switch 1 |   off   |
   |   | rate is 300Kb/s               |              |         |
   |---+-------------------------------+--------------+---------|
   |   | Floppy drive data transfer    | SW1/switch 1 |   on    |
   |   | rate is 250Kb/s               |              |         |
   |---+-------------------------------+--------------+---------|
   |>> | PS/2-type floppy at Drive     | SW1/switch 2 |   on    |
   |   | Select 2 not supported        |              |         |
   |---+-------------------------------+--------------+---------|
   |   | PS/2-type floppy drive on     | SW1/switch 2 |   off   |
   |   | Drive Select 2 supported      |              |         |
   |---+-------------------------------+--------------+---------|
   |>> | Floppy drive enabled          | SW1/switch 3 |   off   |
   |---+-------------------------------+--------------+---------|
   |   | Floppy drive disabled         | SW1/switch 3 |   on    |
   |---+-------------------------------+--------------+---------|
   |>> | Hard drive port address       | SW1/switch 4 |   off   |
   |   | 1F0-1F7h                      |              |         |
   |   |                               |              |         |
   |   | and floppy drive port address |              |         |
   |   | 3F2-3F7h                      |              |         |
   |---+-------------------------------+--------------+---------|
   |   | Hard drive port address       | SW1/switch 4 |   on    |
   |   | 170-177h                      |              |         |
   |   |                               |              |         |
   |   | and floppy drive port address |              |         |
   |   | 372-377h                      |              |         |
   |---+-------------------------------+--------------+---------|
   |>> | Auto deselect enabled         | SW1/switch 5 |   on    |
   |---+-------------------------------+--------------+---------|
   |   | Auto deselect disabled        | SW1/switch 5 |   off   |
   |---+-------------------------------+--------------+---------|
   |>> | BIOS enabled                  | SW1/switch 6 |   on    |
   |---+-------------------------------+--------------+---------|
   |   | BIOS disabled                 | SW1/switch 6 |   off   |
   |---+-------------------------------+--------------+---------|
   |>> | Initial interrupt enabled     | SW1/switch 9 |   on    |
   |   | after reset                   |              |         |
   |---+-------------------------------+--------------+---------|
   |   | Initial interrupt disabled    | SW1/switch 9 |   off   |
   |   | after reset                   |              |         |
   |---+-------------------------------+--------------+---------|
   |>> | Track buffer enabled          |  SW1/switch  |   on    |
   |   |                               |      10      |         |
   |---+-------------------------------+--------------+---------|
   |   | Track buffer disabled         |  SW1/switch  |   off   |
   |   |                               |      10      |         |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                BIOS ADDRESS - DTC6280-15TX                 |
   |------------------------------------------------------------|
   |     Address      |    SW1/switch 7    |    SW1/switch 8    |
   |------------------+--------------------+--------------------|
   |      C8000h      |        off         |        off         |
   |------------------+--------------------+--------------------|
   |      D8000h      |         on         |        off         |
   |------------------+--------------------+--------------------|
   |      D0000h      |        off         |         on         |
   |------------------+--------------------+--------------------|
   |      D4000h      |         on         |         on         |
   +------------------------------------------------------------+