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# DATA TECHNOLOGY CORPORATION
DTC3250
+------------------------------------------------------------+
+------------------------------------------------------------+
Data bus: 8-bit, ISA
Size: Half-length, full-height card
Hard drives supported: Up to seven SCSI devices
Floppy drives supported: Three 360KB or 720KB
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Location |
|------------------------------------------+-----------------|
| 50-pin SCSI connector-internal | CN1 |
|------------------------------------------+-----------------|
| 50-pin SCSI connector-external | CN2 |
|------------------------------------------+-----------------|
| 34-pin data cable connector-floppy drive | CN3 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIOS ADDRESS |
|------------------------------------------------------------|
| Address | SW2/switch 5 | SW2/switch 6 |
|------------------+--------------------+--------------------|
| » | D800h | off | off |
|---+--------------+--------------------+--------------------|
| | DC00h | on | off |
|---+--------------+--------------------+--------------------|
| | C800h | off | on |
|---+--------------+--------------------+--------------------|
| | CC00h | on | on |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Location | Setting |
|--------------------------------+--------------+------------|
| » | Floppy port address | JP1 | pins 1 & 2 |
| | 3F2-3F7h | | closed |
|---+----------------------------+--------------+------------|
| | Floppy port address | JP1 | pins 2 & 3 |
| | 372-377h | | closed |
|---+----------------------------+--------------+------------|
| » | Normal operation | JP2 | pins 2 & 3 |
| | | | closed |
|---+----------------------------+--------------+------------|
| | Factory test enabled | JP2 | pins 1 & 2 |
| | | | closed |
|---+----------------------------+--------------+------------|
| » | SCSI parity check disabled | SW1/switch 3 | on |
|---+----------------------------+--------------+------------|
| | SCSI parity check enabled | SW1/switch 3 | off |
|---+----------------------------+--------------+------------|
| » | Dual-speed floppy | SW2/switch 7 | on |
| | supported | | |
|---+----------------------------+--------------+------------|
| | Single-speed floppy | SW2/switch 7 | off |
| | supported | | |
|---+----------------------------+--------------+------------|
| » | PS/2-type floppy on Drive | SW2/switch 8 | on |
| | Select 2 not supported | | |
|---+----------------------------+--------------+------------|
| | PS/2-type floppy drive on | SW2/switch 8 | off |
| | Drive Select 2 supported | | |
|---+----------------------------+--------------+------------|
| » | Floppy drive disabled | SW2/switch 9 | off |
|---+----------------------------+--------------+------------|
| | Floppy drive enabled | SW2/switch 9 | on |
|---+----------------------------+--------------+------------|
| » | Normal operation mode | SW2/switch | off |
| | | 10 | |
|---+----------------------------+--------------+------------|
| | Factory test enabled | SW2/switch | on |
| | | 10 | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| INTERRUPT REQUEST SWITCHES - SW1 AND SW2 |
|------------------------------------------------------------|
| |INTERRUPT "A"|INQUIRY INTERRUPT | |
| | | "B" | |
|---+-------------+------------------+-----------------------|
| |#| SW1/1 | SW1/2 |SW2/1|SW2/2|SW2/3|SW2/4|
|-+-+-------------+------------------+-----+-----+-----+-----|
| |4| on | on | off | off | off | on |
|-+-+-------------+------------------+-----+-----+-----+-----|
| |5| off | on | off | off | on | off |
|-+-+-------------+------------------+-----+-----+-----+-----|
| |6| on | off | off | on | off | off |
|-+-+-------------+------------------+-----+-----+-----+-----|
|»|7| off | off | on | off | off | off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SCSI ADDRESS |
|------------------------------------------------------------|
| SCSI ID | SW1/switch 4 | SW1/switch 5 | SW1/switch 6 |
|------------+---------------+---------------+---------------|
| | 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 |
|----+-------+---------------+---------------+---------------|
| » | 7 | off | off | off |
+------------------------------------------------------------+