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# WESTERN DIGITAL CORPORATION
WD1002A-FOX
+------------------------------------------------------------+
|------------------------------------------------------------|
| Data bus: | 8-bit, ISA |
|---------------+--------------------------------------------|
| Size: | Half-length, half-height card |
|---------------+--------------------------------------------|
| Hard drive | N/A |
| supported: | |
|---------------+--------------------------------------------|
| Floppy drives | Two 360KB, 1.2MB drives or floppy tape |
| supported: | drives |
+------------------------------------------------------------+
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Location |
|------------------------------------------+-----------------|
| 34-pin connector - floppy drive internal | CN1 |
|------------------------------------------+-----------------|
| 37-pin floppy disk drive port | CN2 |
|------------------------------------------+-----------------|
| 4-pin power suppy for external drives | CN3 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Location | Setting |
|------------------------------------+----------+------------|
| High density ground return for | JP1 | pins 1 & 2 |
| external drive | | closed |
|------------------------------------+----------+------------|
| Standard ground return for | JP1 | pins 2 & 3 |
| external drive | | closed |
|------------------------------------+----------+------------|
| Primary address - (320 - 323) | JP4 | pins 1 & 2 |
| | | closed |
|------------------------------------+----------+------------|
| Secondary address - (328 - 32B) | JP4 | pins 2 & 3 |
| | | closed |
|------------------------------------+----------+------------|
| +5V tied to (CN2) pin 4 for | JP5 | pins 1 & 2 |
| external drive | | closed |
|------------------------------------+----------+------------|
| No connection via pin 4 for | JP5 | pins 2 & 3 |
| external drive | | closed |
|------------------------------------+----------+------------|
| +12V tied to (CN2) pin 1 for | JP6 | pins 1 & 2 |
| external drive | | closed |
|------------------------------------+----------+------------|
| No connection via pin 1 for | JP6 | pins 2 & 3 |
| external drive | | closed |
|------------------------------------+----------+------------|
| Dual speed spinde option - enabled | JP7 | closed |
|------------------------------------+----------+------------|
| Dual speed spinde option - | JP7 | open |
| disabled | | |
|------------------------------------+----------+------------|
| Ground tied to chassis ground - | JP8 | closed |
| enabled | | |
|------------------------------------+----------+------------|
| Ground tied to chassis ground - | JP8 | open |
| disabled | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIOS ADDRESS |
|------------------------------------------------------------|
| Setting | JP2 | JP3 |
|------------------+--------------------+--------------------|
| EE000 - EFFFFh | pins 2 & 3 closed | Pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| CE000 - CFFFFh | pins 2 & 3 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| EC000 - EDFFFh | pins 1 & 2 closed | pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| CC000 - CDFFFh | pins 1 & 2 closed | pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRIVE 1 TYPE SELECT |
|------------------------------------------------------------|
| Setting | SW1/1 | SW1/2 |
|--------------------+-------------------+-------------------|
| 360KB | off | off |
|--------------------+-------------------+-------------------|
| 1.2MB | off | on |
|--------------------+-------------------+-------------------|
| 720KB | on | off |
|--------------------+-------------------+-------------------|
| 1.44MB | on | on |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRIVE 2 TYPE SELECT |
|------------------------------------------------------------|
| Setting | SW1/3 | SW1/4 |
|--------------------+-------------------+-------------------|
| 360KB | off | off |
|--------------------+-------------------+-------------------|
| 1.2MB | off | on |
|--------------------+-------------------+-------------------|
| 720KB | on | off |
|--------------------+-------------------+-------------------|
| 1.44MB | on | on |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRIVE 3 TYPE SELECT |
|------------------------------------------------------------|
| Setting | SW1/5 | SW1/6 |
|--------------------+-------------------+-------------------|
| 360KB | off | off |
|--------------------+-------------------+-------------------|
| 1.2MB | off | on |
|--------------------+-------------------+-------------------|
| 720KB | on | off |
|--------------------+-------------------+-------------------|
| 1.44MB | on | on |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRIVE 4 TYPE SELECT |
|------------------------------------------------------------|
| Setting | SW1/7 | SW1/8 |
|--------------------+-------------------+-------------------|
| 360KB | off | off |
|--------------------+-------------------+-------------------|
| 1.2MB | off | on |
|--------------------+-------------------+-------------------|
| 720KB | on | off |
|--------------------+-------------------+-------------------|
| 1.44MB | on | on |
+------------------------------------------------------------+