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# WESTERN DIGITAL CORPORATION
WD1003V-MM1/MM2, WD1006V-MM1/MM2
Replaces the WD1003-WAH/WA2
and WD1006-WAH/WA2 respectively
Data bus: 16-bit, PC/AT
Size: Full-length, full-height card
Hard drives supported: Two MFM ST506/412 drives
Floppy drives supported: WD100xV-MM2:Two 360KB, 720KB, 1.2MB,
or 1.44MB
WD100xV-MM1:None
Maximum heads/cyl.: 16 heads and 2048 cylinders
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Location |
|-------------------------------------------+----------------|
| 34-pin data cable connector-floppy drive | J1 |
|-------------------------------------------+----------------|
| 20-pin data cable connector-drive 1 | J3 |
|-------------------------------------------+----------------|
| 20-pin data cable connector-drive 0 | J4 |
|-------------------------------------------+----------------|
| 34-pin control cable connector-hard drive | J5 |
|-------------------------------------------+----------------|
| 4-pin connector-drive active LED | J6 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Location | Setting |
|------------------------------------+-------------+---------|
| Hard drives in latched mode | W1/jumper 1 | open |
|------------------------------------+-------------+---------|
| Hard drives in non-latched mode | W1/jumper 1 | closed |
|------------------------------------+-------------+---------|
| 4 byte ECC | W1/jumper 2 | open |
|------------------------------------+-------------+---------|
| 7 byte ECC | W1/jumper 2 | closed |
|------------------------------------+-------------+---------|
| Caching enabled | W1/jumper 3 | open |
|------------------------------------+-------------+---------|
| Caching disabled | W1/jumper 3 | closed |
|------------------------------------+-------------+---------|
| Not WD1003-WAH/WA2 compatible | W1/jumper 4 | open |
|------------------------------------+-------------+---------|
| WD1003-WAH/WA2 compatible | W1/jumper 4 | closed |
|------------------------------------+-------------+---------|
| Hard drive port address is | W3 | open |
| 1F0-1F7h | | |
|------------------------------------+-------------+---------|
| Hard drive port address is | W3 | closed |
| 170-177h | | |
|------------------------------------+-------------+---------|
| Floppy drive port address is | W4 | open |
| 3F0-3F7h | | |
|------------------------------------+-------------+---------|
| Floppy drive port address is | W4 | closed |
| 370-377h | | |
|------------------------------------+-------------+---------|
| Single speed floppy drive | W5 | open |
| supported | | |
|------------------------------------+-------------+---------|
| Dual speed floppy drive supported | W5 | closed |
|------------------------------------+-------------+---------|
| Bracket ground option disabled | W6 | open |
|------------------------------------+-------------+---------|
| Bracket to board ground connected | W6 | closed |
+------------------------------------------------------------+