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

   DTC5180C

   +------------------------------------------------------------+
   |------------------------------------------------------------|
   | Data bus:                | 16-bit, ISA                     |
   |--------------------------+---------------------------------|
   | Size:                    | Half-length, full-height card   |
   |--------------------------+---------------------------------|
   | Hard drive supported:    | Two MFM ST506/412 drives        |
   |--------------------------+---------------------------------|
   | Floppy drives supported: | None                            |
   +------------------------------------------------------------+

<gopher://bitreich.org/I/th99/c/C-D/20451-1.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      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function                | Location | Setting |
   |---------------------------------------+----------+---------|
   |>> | Floppy drive change signal driven |    W1    | closed  |
   |   | low                               |          |         |
   |---+-----------------------------------+----------+---------|
   |   | Floppy drive change not driven    |    W1    |  open   |
   |---+-----------------------------------+----------+---------|
   |>> | Hard drive port address is        | W2 & W3  |  open   |
   |   | 1F0-1F7h                          |          |         |
   |---+-----------------------------------+----------+---------|
   |   | Hard drive port address is        | W2 & W3  | closed  |
   |   | 170-177h                          |          |         |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |             COMPAQ/IBM AT DRIVE SELECT CONTROL             |
   |------------------------------------------------------------|
   |  Mode  |W5/jumper |W5/jumper |W5/jumper |W5/jumper 4|  W6  |
   |        |    1     |    2     |    3     |           |      |
   |--------+----------+----------+----------+-----------+------|
   |>>|IBM AT|   open   |  closed  |   open   |  closed   | open |
   |-+------+----------+----------+----------+-----------+------|
   | |Compaq|  closed  |   open   |  closed  |   open    |closed|
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               MISCELLANEOUS TECHNICAL NOTES                |
   |------------------------------------------------------------|
   |         The function of jumper W4 is undocumented.         |
   +------------------------------------------------------------+