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

   DTC3274VL (900176-89XX)

   +------------------------------------------------------------+
   |------------------------------------------------------------|
   | Data bus:         | 32-bit VL-Bus                          |
   |-------------------+----------------------------------------|
   | Size:             | Three/quarter-length, half-height card |
   |-------------------+----------------------------------------|
   | Hard drive        | Up to seven SCSI devices               |
   | supported:        |                                        |
   |-------------------+----------------------------------------|
   | Floppy drives     | Two 360KB, 720KB, 1.2MB, 1.44MB drives |
   | supported:        |                                        |
   +------------------------------------------------------------+

<gopher://bitreich.org/I/th99/c/C-D/20838-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |                 Function                 |    Location     |
   |------------------------------------------+-----------------|
   | 34-pin cable connector - floppy drive    |       JP5       |
   |------------------------------------------+-----------------|
   | 50-pin SCSI connector - internal         |       JP7       |
   |------------------------------------------+-----------------|
   | 50-pin SCSI connector - external         |       JP8       |
   |------------------------------------------+-----------------|
   | 4-pin connector - drive active LED       |      JP10       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     SCSI ID SELECTION                      |
   |------------------------------------------------------------|
   |     SCSI ID     |     SW11     |    SW12     |    SW13     |
   |-----------------+--------------+-------------+-------------|
   |>>  |     7      |     off      |     off     |     off     |
   |----+------------+--------------+-------------+-------------|
   |    |     0      |      on      |     on      |     on      |
   |----+------------+--------------+-------------+-------------|
   |    |     1      |     off      |     on      |     on      |
   |----+------------+--------------+-------------+-------------|
   |    |     2      |      on      |     off     |     on      |
   |----+------------+--------------+-------------+-------------|
   |    |     3      |     off      |     off     |     on      |
   |----+------------+--------------+-------------+-------------|
   |    |     4      |      on      |     on      |     off     |
   |----+------------+--------------+-------------+-------------|
   |    |     5      |     off      |     on      |     off     |
   |----+------------+--------------+-------------+-------------|
   |    |     6      |      on      |     off     |     off     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |             Function             |   Location    | Setting |
   |----------------------------------+---------------+---------|
   |>> | BIOS support 2 hard drives   |      JP1      |  open   |
   |---+------------------------------+---------------+---------|
   |   | BIOS support 3 or more hard  |      JP1      | closed  |
   |   | drives                       |               |         |
   |---+------------------------------+---------------+---------|
   |>> | Factory configured - do not  |      JP2      |  open   |
   |   | alter                        |               |         |
   |---+------------------------------+---------------+---------|
   |>> | BIOS enabled                 |      JP3      | closed  |
   |---+------------------------------+---------------+---------|
   |   | BIOS disabled                |      JP3      |  open   |
   |---+------------------------------+---------------+---------|
   |>> | Factory configured - do not  |      JP4      |  open   |
   |   | alter                        |               |         |
   |---+------------------------------+---------------+---------|
   |>> | Factory configured - do not  | JP6/pins 1 &  |   N/A   |
   |   | alter                        |       2       |         |
   |---+------------------------------+---------------+---------|
   |>> | Active termination enabled   |      JP9      |  open   |
   |---+------------------------------+---------------+---------|
   |   | Active termination disabled  |      JP9      | closed  |
   |---+------------------------------+---------------+---------|
   |>> | Factory configured - do not  | JP11/pins 2 & |   N/A   |
   |   | alter                        |       3       |         |
   |---+------------------------------+---------------+---------|
   |>> | Factory configured - do not  |     JP12      |  open   |
   |   | alter                        |               |         |
   |---+------------------------------+---------------+---------|
   |>> | Factory configured - do not  |     JP13      |  open   |
   |   | alter                        |               |         |
   |---+------------------------------+---------------+---------|
   |>> | Factory configured - do not  |     JP14      |  open   |
   |   | alter                        |               |         |
   |---+------------------------------+---------------+---------|
   |>> | Factory configured - do not  |     JP15      |  open   |
   |   | alter                        |               |         |
   |---+------------------------------+---------------+---------|
   |>> | CPU clock <=33MHz            |      SW1      |   off   |
   |---+------------------------------+---------------+---------|
   |   | CPU clock >33MHz             |      SW1      |   on    |
   |---+------------------------------+---------------+---------|
   |>> | Factory configured - do not  |      SW8      |   N/A   |
   |   | alter                        |               |         |
   |---+------------------------------+---------------+---------|
   |>> | Synchronous Negotiation      |     SW14      |   on    |
   |   | disabled                     |               |         |
   |---+------------------------------+---------------+---------|
   |   | Synchronous Negotiation      |     SW14      |   off   |
   |   | enabled                      |               |         |
   |---+------------------------------+---------------+---------|
   |>> | Fast synchronous transfer    |     SW15      |   on    |
   |   | disabled                     |               |         |
   |---+------------------------------+---------------+---------|
   |   | Fast synchronous transfer    |     SW15      |   off   |
   |   | enabled                      |               |         |
   |---+------------------------------+---------------+---------|
   |>> | Floppy disk controller       |     SW16      |   off   |
   |   | enabled                      |               |         |
   |---+------------------------------+---------------+---------|
   |   | Floppy disk controller       |     SW16      |   on    |
   |   | disabled                     |               |         |
   |---+------------------------------+---------------+---------|
   |>> | SCSI parity enabled          |     SW17      |   off   |
   |---+------------------------------+---------------+---------|
   |   | SCSI parity disabled         |     SW17      |   on    |
   |---+------------------------------+---------------+---------|
   |>> | Factory configured - do not  |     SW18      |   N/A   |
   |   | alter                        |               |         |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 BASE I/O ADDRESS SELECTION                 |
   |------------------------------------------------------------|
   |         Address         |       SW2       |      SW3       |
   |-------------------------+-----------------+----------------|
   |>>   |       330h        |       off       |      off       |
   |-----+-------------------+-----------------+----------------|
   |     |       130h        |       on        |       on       |
   |-----+-------------------+-----------------+----------------|
   |     |       230h        |       on        |      off       |
   |-----+-------------------+-----------------+----------------|
   |     |       334h        |       off       |       on       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   BIOS ADDRESS SELECTION                   |
   |------------------------------------------------------------|
   |        Address         |       SW4       |       SW5       |
   |------------------------+-----------------+-----------------|
   |>> |     C800-CBFFh     |       off       |       off       |
   |---+--------------------+-----------------+-----------------|
   |   |     CC00-CCFFh     |       off       |       on        |
   |---+--------------------+-----------------+-----------------|
   |   |     D800-DBFFh     |       on        |       off       |
   |---+--------------------+-----------------+-----------------|
   |   |     DC00-DFFFh     |       on        |       on        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    INTERRUPT SELECTION                     |
   |------------------------------------------------------------|
   |         IRQ          |       SW6        |       SW7        |
   |----------------------+------------------+------------------|
   |>>  |       11        |        on        |       off        |
   |----+-----------------+------------------+------------------|
   |    |       10        |        on        |        on        |
   |----+-----------------+------------------+------------------|
   |    |       12        |       off        |        on        |
   |----+-----------------+------------------+------------------|
   |    |       15        |       off        |       off        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                MISCELLANOUS TECHNICAL NOTES                |
   |------------------------------------------------------------|
   |  DTC 3274VL can support floptical drives through an ASPI   |
   |                          utility.                          |
   +------------------------------------------------------------+