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

   DTC5180CRH

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

   Data bus: 16-bit, ISA

   Size: Half-length, full-height card

   Hard drives supported:  Two MFM ST506/412 drives

   Floppy drives supported: None

   Sector interleave: 2:1

<gopher://bitreich.org/I/th99/c/C-D/20065-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |                 Function                  |    Location    |
   |-------------------------------------------+----------------|
   | 34-pin control cable connector-hard drive |       J1       |
   |-------------------------------------------+----------------|
   | 20-pin data cable connector-drive 0       |       J2       |
   |-------------------------------------------+----------------|
   | 20-pin data cable connector-drive 1       |       J3       |
   |-------------------------------------------+----------------|
   | 4-pin connector-drive active LED          |       J4       |
   |-------------------------------------------+----------------|
   | 5-pin connector-DC power                  |       J5       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |              Function              | Location |  Setting   |
   |------------------------------------+----------+------------|
   |>> | Floppy change signal not       |    W1    |    open    |
   |   | driven                         |          |            |
   |---+--------------------------------+----------+------------|
   |   | Floppy signal driven low (XT   |    W1    |   closed   |
   |   | system default)                |          |            |
   |---+--------------------------------+----------+------------|
   |>> | Interrupt remains enabled      |    W4    | pins 2 & 3 |
   |   | after reset                    |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | Interrupt disabled after reset |    W4    | pins 1 & 2 |
   |   |                                |          |   closed   |
   |---+--------------------------------+----------+------------|
   |>> | Drive select "flip-flop"       |    W5    | pins 1 & 2 |
   |   | controlled by firmware         |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | Drive select "flip-flop"       |    W5    | pins 2 & 3 |
   |   | controlled by system reset     |          |   closed   |
   |---+--------------------------------+----------+------------|
   |>> | Factory configured - do not    |    W6    |   closed   |
   |   | alter                          |          |            |
   |---+--------------------------------+----------+------------|
   |>> | Auto deselect enabled          |    W7    |   closed   |
   |---+--------------------------------+----------+------------|
   |   | Auto deselect disabled         |    W7    |    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 |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               MISCELLANEOUS TECHNICAL NOTES                |
   |------------------------------------------------------------|
   |          This controller has no on-board software          |
   +------------------------------------------------------------+