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# DATA TECHNOLOGY CORPORATION
DTC2278VL (900085-89A)
+------------------------------------------------------------+
|------------------------------------------------------------|
| Data bus: | 32-bit VL-Bus |
|-------------------+----------------------------------------|
| Size: | Three/quarter-length, half-height card |
|-------------------+----------------------------------------|
| Hard drive | Two IDE(AT) interface drives |
| supported: | |
|-------------------+----------------------------------------|
| Floppy drives | Two 360KB, 720KB, 1.2MB, 1.44MB drives |
| supported: | |
+------------------------------------------------------------+
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Location |
|------------------------------------------+-----------------|
| 25-pin parallel port | J1 |
|------------------------------------------+-----------------|
| 10-pin serial port 2 | J2 |
|------------------------------------------+-----------------|
| 10-pin serial port 1 | J3 |
|------------------------------------------+-----------------|
| 16-pin game port | J4 |
|------------------------------------------+-----------------|
| 34-pin cable connector - floppy drive | J5 |
|------------------------------------------+-----------------|
| 40-pin connector - IDE(AT) interface | J6 |
|------------------------------------------+-----------------|
| 4-pin connector - drive active LED | J7 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Location | Setting |
|------------------------------------+----------+------------|
| » | Game port enabled | W1 | closed |
|---+--------------------------------+----------+------------|
| | Game port disabled | W1 | open |
|---+--------------------------------+----------+------------|
| » | Parallel port is | W2 | closed |
| | uni-directional | | |
|---+--------------------------------+----------+------------|
| | Parallel port is | W2 | open |
| | bi-directional | | |
|---+--------------------------------+----------+------------|
| » | IDE(AT) interface interrupt | W9 | pins 1 & 2 |
| | IRQ14 select | | closed |
|---+--------------------------------+----------+------------|
| | IDE(AT) interface interrupt | W9 | pins 2 & 3 |
| | IRQ15 select | | closed |
|---+--------------------------------+----------+------------|
| » | Floppy drive interface enabled | W10 | pins 2 & 3 |
| | | | closed |
|---+--------------------------------+----------+------------|
| | Floppy drive interface | W10 | pins 1 & 2 |
| | disabled | | closed |
|---+--------------------------------+----------+------------|
| » | Floppy drive interface address | W11 | pins 1 & 2 |
| | 3F0-3F7h select | | closed |
|---+--------------------------------+----------+------------|
| | Floppy drive interface address | W11 | pins 2 & 3 |
| | 370-377h select | | closed |
|---+--------------------------------+----------+------------|
| » | IDE(AT) interface address | W12 | pins 1 & 2 |
| | 1F0-1F7, 3F6-3F7h select | | closed |
|---+--------------------------------+----------+------------|
| | IDE(AT) interface address | W12 | pins 2 & 3 |
| | 170-177, 376-377h select | | closed |
|---+--------------------------------+----------+------------|
| » | IDE(AT) interface enabled | W13 | pins 2 & 3 |
| | | | closed |
|---+--------------------------------+----------+------------|
| | IDE(AT) interface disabled | W13 | pins 1 & 2 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PRIMARY SERIAL PORT ADDRESS SELECTION |
|------------------------------------------------------------|
| COM | W7 | W8 |
|------------------+--------------------+--------------------|
| » | COM1 (3F8h) | pins 1 & 2 closed | pins 2 & 3 closed |
|---+--------------+--------------------+--------------------|
| | COM3 (3E8h) | pins 2 & 3 closed | pins 1 & 2 closed |
|---+--------------+--------------------+--------------------|
| | COM4 (2E8h) | pins 2 & 3 closed | pins 2 & 3 closed |
|---+--------------+--------------------+--------------------|
| | Disabled | pins 1 & 2 closed | pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SECONDARY SERIAL PORT ADDRESS SELECTION |
|------------------------------------------------------------|
| COM | W5 | W6 |
|------------------+--------------------+--------------------|
| » | COM2 (2F8h) | pins 1 & 2 closed | pins 2 & 3 closed |
|---+--------------+--------------------+--------------------|
| | COM3 (3E8h) | pins 2 & 3 closed | pins 2 & 3 closed |
|---+--------------+--------------------+--------------------|
| | COM4 (2E8h) | pins 2 & 3 closed | pins 1 & 2 closed |
|---+--------------+--------------------+--------------------|
| | Disabled | pins 1 & 2 closed | pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PARALLEL PORT ADDRESS SELECTION |
|------------------------------------------------------------|
| LPT | W3 | W4 |
|------------------+--------------------+--------------------|
| » | LPT1 (378h) | pins 1 & 2 closed | pins 2 & 3 closed |
|---+--------------+--------------------+--------------------|
| | LPT2 (278h) | pind 2 & 3 closed | pins 1 & 2 closed |
|---+--------------+--------------------+--------------------|
| | LPT3 (3BCh) | pins 2 & 3 closed | pins 2 & 3 closed |
|---+--------------+--------------------+--------------------|
| | Disabled | pins 1 & 2 closed | pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| IDE DATA TRANSFER RATE (FOR >33MHZ VL-BUS SYSTEMS) |
|------------------------------------------------------------|
| Rate | W14 | W15 | W16 | W17 | W18 |
| (MBps) | | | | | |
|-----------+----------+---------+---------+--------+--------|
| 3.3 | pins 1 & | pins 2 | pins 1 | pins 2 | pins 2 |
| | 2 | & 3 | & 2 | & 3 | & 3 |
|-----------+----------+---------+---------+--------+--------|
| 3.6 | pins 2 & | pins 1 | pins 1 | pins 2 | pins 2 |
| | 3 | & 2 | & 2 | & 3 | & 3 |
|-----------+----------+---------+---------+--------+--------|
| 3.8 | pins 1 & | pins 1 | pins 1 | pins 2 | pins 2 |
| | 2 | & 2 | & 2 | & 3 | & 3 |
|-----------+----------+---------+---------+--------+--------|
| 4.2 | pins 2 & | pins 2 | pins 2 | pins 1 | pins 2 |
| | 3 | & 3 | & 3 | & 2 | & 3 |
|-----------+----------+---------+---------+--------+--------|
| 4.5 | pins 1 & | pins 2 | pins 2 | pins 1 | pins 2 |
| | 2 | & 3 | & 3 | & 2 | & 3 |
|-----------+----------+---------+---------+--------+--------|
| 5.0 | pins 2 & | pins 1 | pins 2 | pins 1 | pins 2 |
| | 3 | & 2 | & 3 | & 2 | & 3 |
|-----------+----------+---------+---------+--------+--------|
| 5.6 | pins 1 & | pins 1 | pins 2 | pins 1 | pins 2 |
| | 2 | & 2 | & 3 | & 2 | & 3 |
|-----------+----------+---------+---------+--------+--------|
| 6.3 | pins 2 & | pins 2 | pins 1 | pins 1 | pins 2 |
| | 3 | & 3 | & 2 | & 2 | & 3 |
|-----------+----------+---------+---------+--------+--------|
| 7.2 | pins 1 & | pins 1 | pins 1 | pins 1 | pins 2 |
| | 2 | & 2 | & 2 | & 2 | & 3 |
|------------------------------------------------------------|
| Note: Pins designated are in the closed position. If the |
| transfer rate of the drive you are using in your sytem |
| does not exactly match one of the rates listed above, |
| select the rate which is closest to but below the actual |
| rate of the drive. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| IDE DATA TRANSFER RATE (FOR <=33MHZ VL-BUS SYSTEMS) |
|------------------------------------------------------------|
| Rate (MBps) | W14 | W15 | W16 | W17 | W18 |
|--------------+---------+--------+--------+--------+--------|
| » | 3.9 | pins 2 | pins 2 | pins 1 | pins 2 | pins 1 |
| | | & 3 | & 3 | & 2 | & 3 | & 2 |
|-----+--------+---------+--------+--------+--------+--------|
| | 3.3 | pins 1 | pins 2 | pins 2 | pins 2 | pins 1 |
| | | & 2 | & 3 | & 3 | & 3 | & 2 |
|-----+--------+---------+--------+--------+--------+--------|
| | 3.5 | pins 2 | pins 1 | pins 2 | pins 2 | pins 1 |
| | | & 3 | & 2 | & 3 | & 3 | & 2 |
|-----+--------+---------+--------+--------+--------+--------|
| | 3.7 | pins 1 | pins 1 | pins 2 | pins 2 | pins 1 |
| | | & 2 | & 2 | & 3 | & 3 | & 2 |
|-----+--------+---------+--------+--------+--------+--------|
| | 4.2 | pins 1 | pins 2 | pins 1 | pins 2 | pins 1 |
| | | & 2 | & 3 | & 2 | & 3 | & 2 |
|-----+--------+---------+--------+--------+--------+--------|
| | 4.4 | pins 2 | pins 1 | pins 1 | pins 2 | pins 1 |
| | | & 3 | & 2 | & 2 | & 3 | & 2 |
|-----+--------+---------+--------+--------+--------+--------|
| | 4.8 | pins 1 | pins 1 | pins 1 | pins 2 | pins 1 |
| | | & 2 | & 2 | & 2 | & 3 | & 2 |
|-----+--------+---------+--------+--------+--------+--------|
| | 5.1 | pins 2 | pins 2 | pins 2 | pins 1 | pins 1 |
| | | & 3 | & 3 | & 3 | & 2 | & 2 |
|-----+--------+---------+--------+--------+--------+--------|
| | 5.6 | pins 1 | pins 2 | pins 2 | pins 1 | pins 1 |
| | | & 2 | & 3 | & 3 | & 2 | & 2 |
|-----+--------+---------+--------+--------+--------+--------|
| | 6.1 | pins 2 | pins 1 | pins 2 | pins 1 | pins 1 |
| | | & 3 | & 2 | & 3 | & 2 | & 2 |
|-----+--------+---------+--------+--------+--------+--------|
| | 6.7 | pins 1 | pins 1 | pins 2 | pins 1 | pins 1 |
| | | &2 | & 2 | & 3 | & 2 | & 2 |
|-----+--------+---------+--------+--------+--------+--------|
| | 7.4 | pins 2 | pins 2 | pins 1 | pins 1 | pins 1 |
| | | & 3 | & 3 | & 2 | & 2 | & 2 |
|-----+--------+---------+--------+--------+--------+--------|
| | 8.3 | pins 1 | pins 1 | pins 1 | pins 1 | pins 1 |
| | | & 2 | & 2 | & 2 | & 2 | & 2 |
|------------------------------------------------------------|
| Note: Pins designated are in the closed position. If the |
| transfer rate of the drive you are using in your sytem |
| does not exactly match one of the rates listed above, |
| select the rate which is closest to but below the actual |
| rate of the drive. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PRIMARY SERIAL PORT INTERRUPT SELECTION |
|------------------------------------------------------------|
| IRQ | W19 | W20 | W21 |
|-----------------+--------------+--------------+------------|
| » | IRQ4 | closed | open | open |
|----+------------+--------------+--------------+------------|
| | IRQ3 | open | closed | open |
|----+------------+--------------+--------------+------------|
| | IRQ5 | open | open | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SECONDARY SERIAL PORT INTERRUPT SELECTION |
|------------------------------------------------------------|
| IRQ | W22 | W23 | W24 |
|------------------+-------------+-------------+-------------|
| » | IRQ3 | closed | open | open |
|-----+------------+-------------+-------------+-------------|
| | IRQ4 | open | closed | open |
|-----+------------+-------------+-------------+-------------|
| | IRQ5 | open | open | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PARALLEL PORT INERRUPT SELECTION |
|------------------------------------------------------------|
| IRQ | W25 | W26 |
|-----------------------+------------------+-----------------|
| » | IRQ7 | closed | open |
|-----+-----------------+------------------+-----------------|
| | IRQ5 | open | closed |
+------------------------------------------------------------+