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

   DTC6282-24

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

   Data bus: 16-bit, ISA

   Size: Half-length, full-height card

   Hard drives supported: Two ESDI drives

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

<gopher://bitreich.org/I/th99/c/C-D/20076-1.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       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        BIOS ADDRESS                        |
   |------------------------------------------------------------|
   |     Address      |    W1/jumper 1     |    W1/jumper 2     |
   |------------------+--------------------+--------------------|
   |      C800h       |        open        |        open        |
   |------------------+--------------------+--------------------|
   |      D000h       |       closed       |        open        |
   |------------------+--------------------+--------------------|
   |      D800h       |        open        |       closed       |
   |------------------+--------------------+--------------------|
   |      D400h       |       closed       |       closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |                Function                 |Location |Setting |
   |-----------------------------------------+---------+--------|
   |>>|BIOS enabled                           |W1/jumper| closed |
   | |                                       |    3    |        |
   |-+---------------------------------------+---------+--------|
   | |BIOS disabled                          |W1/jumper|  open  |
   | |                                       |    3    |        |
   |-+---------------------------------------+---------+--------|
   |>>|Initial interrupt enabled after reset  |W1/jumper| closed |
   | |                                       |    4    |        |
   |-+---------------------------------------+---------+--------|
   | |Initial interrupt disabled after reset |W1/jumper|  open  |
   | |                                       |    4    |        |
   |-+---------------------------------------+---------+--------|
   |>>|Floppy drive uses standard logic       |W1/jumper| closed |
   | |                                       |    5    |        |
   |-+---------------------------------------+---------+--------|
   | |Floppy drive uses reverse logic        |W1/jumper|  open  |
   | |                                       |    5    |        |
   |-+---------------------------------------+---------+--------|
   |>>|Standard AT cable selected             |W1/jumper|  open  |
   | |                                       |    6    |        |
   |-+---------------------------------------+---------+--------|
   | |IBM cable selected                     |W1/jumper| closed |
   | |                                       |    6    |        |
   |-+---------------------------------------+---------+--------|
   |>>|Normal IRQ timing                      |W2/jumper|  open  |
   | |                                       |    8    |        |
   |-+---------------------------------------+---------+--------|
   | |IRQ delay (40 m                        |W2/jumper| closed |
   | |                                       |    8    |        |
   |-+---------------------------------------+---------+--------|
   |>>|Floppy drive enabled                   |W2/jumper|  open  |
   | |                                       |    9    |        |
   |-+---------------------------------------+---------+--------|
   | |Floppy drive disabled                  |W2/jumper| closed |
   | |                                       |    9    |        |
   |-+---------------------------------------+---------+--------|
   |>>|Auto deselect disabled                 |W2/jumper|  open  |
   | |                                       |   10    |        |
   |-+---------------------------------------+---------+--------|
   | |Auto deselect enabled                  |W2/jumper| closed |
   | |                                       |   10    |        |
   |-+---------------------------------------+---------+--------|
   |>>|Hard drive port address is 1F0-1F7h    |W2/jumper| closed |
   | |                                       |   11    |        |
   |-+---------------------------------------+---------+--------|
   | |Hard drive port address is 170-177h    |W2/jumper|  open  |
   | |                                       |   11    |        |
   |-+---------------------------------------+---------+--------|
   |>>|Floppy drive precomp is scaled by data |   W3    |pins 1 &|
   | |rate:                                  |         | 2 open |
   | |500KHz=125ns;300KHz=208ns;250KHz=250ns |         |        |
   |-+---------------------------------------+---------+--------|
   | |Floppy drive precompensation is 125ns  |   W3    |pins 1 &|
   | |                                       |         |2 closed|
   |-+---------------------------------------+---------+--------|
   |>>|Single speed floppy drives             |   W3    |pins 3 &|
   | |                                       |         | 4 open |
   |-+---------------------------------------+---------+--------|
   | |Dual speed floppy drives               |   W3    |pins 3 &|
   | |                                       |         |4 closed|
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     INTERRUPT REQUEST                      |
   |------------------------------------------------------------|
   |             IRQ              | W2/jumper 12 | W2/jumper 13 |
   |------------------------------+--------------+--------------|
   |>> | Hard Drive Interrupt     |     open     |    closed    |
   |   | Request is IRQ14         |              |              |
   |---+--------------------------+--------------+--------------|
   |   | Hard Drive Interrupt     |    closed    |     open     |
   |   | Request is IRQ15         |              |              |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               MISCELLANEOUS TECHNICAL NOTES                |
   |------------------------------------------------------------|
   |  W2/jumpers 1 through 7, and W2/jumpers 14 through 18 are  |
   |                         Not used.                          |
   +------------------------------------------------------------+