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# WESTERN DIGITAL CORPORATION
WD1002-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 - external | CN2 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Location | Setting |
|------------------------------------+----------+------------|
| Factory configured setting - do | W3 | pins 1 & 2 |
| not alter | | closed |
|------------------------------------+----------+------------|
| Factory configured setting - do | W4 | pins 2 & 3 |
| not alter | | closed |
|------------------------------------+----------+------------|
| Optional BIOS - enabled | W5 | pins 1 & 2 |
| | | closed |
|------------------------------------+----------+------------|
| Optional BIOS - disabled | W5 | pins 2 & 3 |
| | | closed |
|------------------------------------+----------+------------|
| Controller grounded to chassis | W6 | pins 1 & 2 |
| | | closed |
|------------------------------------+----------+------------|
| Controller not grounded | W6 | pins 2 & 3 |
| | | closed |
|------------------------------------+----------+------------|
| Dual speed spindle option - | W7 | closed |
| enabled | | |
|------------------------------------+----------+------------|
| Dual speed spindle option - | W7 | open |
| disabled | | |
|------------------------------------+----------+------------|
| Precompensation set to 187nsec | W8 | closed |
|------------------------------------+----------+------------|
| Precompensation set to 125nsec | W8 | open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRIVE POWER SELECT |
|------------------------------------------------------------|
| Setting | W9 | W10 | W11 |
|-------------------------+-----------+-----------+----------|
| Power supplied by host | closed | closed | closed |
|-------------------------+-----------+-----------+----------|
| Power supplied by drive | open | open | open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIOS ADDRESS |
|------------------------------------------------------------|
| Address | W1 | W2 |
|-----------------+----------------------+-------------------|
| EF000 - EEFFF | pins 2 & 3 closed | pins 2 & 3 closed |
|-----------------+----------------------+-------------------|
| ED000 - ECFFF | pins 2 & 3 closed | pins 1 & 2 closed |
|-----------------+----------------------+-------------------|
| CF000 - CEFFF | pins 1 & 2 closed | pins 2 & 3 closed |
|-----------------+----------------------+-------------------|
| CD000 - CCFFF | pins 1 & 2 closed | pins 1 & 2 closed |
|------------------------------------------------------------|
| Note: If W1 & W2 are removed this will disable the BIOS |
| regardless of the setting of W5. |
+------------------------------------------------------------+