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# DATA TECHNOLOGY CORPORATION
DTC5280I, DTC7280
+------------------------------------------------------------+
+------------------------------------------------------------+
Data bus: 16-bit, ISA
Size: Full-length, full-height card
Hard drives supported: Two MFM ST506/412 drives
Floppy drives supported: Two 360KB, 720KB, 1.2MB, or 1.44MB
Interface: DTC5280i: 2:1
DTC7280: 1:1
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Location |
|---------------------------------------------+--------------|
| 34-pin control cable connector-floppy drive | J1 |
|---------------------------------------------+--------------|
| 34-pin data cable connector-hard drive | J2 |
|---------------------------------------------+--------------|
| 20-pin data cable connector-drive 0 | J3 |
|---------------------------------------------+--------------|
| 20-pin data cable connector-drive 1 | J4 |
|---------------------------------------------+--------------|
| 5-pin connector-drive active LED | J5 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Location | Setting |
|---------------------------------------+----------+---------|
| » | Initial floppy data transfer rate | W4 | open |
| | is 500KHz | | |
|---+-----------------------------------+----------+---------|
| | Initial floppy data transfer rate | W4 | closed |
| | is 250KHz | | |
|---+-----------------------------------+----------+---------|
| » | Hardware drive select mode | W5 | closed |
| | enabled | | |
|---+-----------------------------------+----------+---------|
| | Firmware drive select mode | W5 | open |
| | enabled | | |
|---+-----------------------------------+----------+---------|
| » | Auto-deselect enabled | W6 | closed |
|---+-----------------------------------+----------+---------|
| | Auto-deselect disabled | W6 | open |
|---+-----------------------------------+----------+---------|
| » | Floppy drive precompensation is | W7 | open |
| | scaled by data rate: | | |
| | | | |
| | 500KHz=125ns, 300KHz=208ns, | | |
| | 250KHz=250ns | | |
|---+-----------------------------------+----------+---------|
| | Floppy drive precompensation is | W7 | closed |
| | 125ns | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| HARD DRIVE PORT ADDRESS |
|------------------------------------------------------------|
| Address | W2 | W3 |
|----------------------------------------+---------+---------|
| » | Port addresses are 1F0-1F7 3F03F7h | open | open |
|---+------------------------------------+---------+---------|
| | Port addresses are 170-177 370377h | closed | closed |
+------------------------------------------------------------+