WESTERN DIGITAL CORPORATION
===========================

   WDXT-GEN

   Data bus: 8-bit, PC/XT

   Size: Half-length, full-height card

   Hard drives supported: Two MFM ST506/412 drives

   Floppy drives supported: None

   Maximum heads/cyl.: 8 heads and 1024 cylinders

<gopher://bitreich.org/I/th99/c/U-Z/20238-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | 34-pin control cable connector-hard drive    |     J1      |
   |----------------------------------------------+-------------|
   | 20-pin data cable connector-drive 0          |     J2      |
   |----------------------------------------------+-------------|
   | 20-pin data cable connector-drive 1          |     J3      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  HARD DRIVE CONFIGURATION                  |
   |------------------------------------------------------------|
   |Feature# |Form. Cap.|Heads |Cylinders|Precomp |RWC |StepRate|
   |---------+----------+------+---------+--------+----+--------|
   |F300/F320|   21MB   |  4   |   615   |  307   |None|30 m sec|
   |---------+----------+------+---------+--------+----+--------|
   |  F335   |   32MB   |  5   |   733   |  367   |None|18 m sec|
   |---------+----------+------+---------+--------+----+--------|
   |  F336   |   32MB   |  6   |   640   |  210   |210 |18 m sec|
   |---------+----------+------+---------+--------+----+--------|
   |  F340   |   42MB   |  6   |   820   |  410   |None|18 m sec|
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               MISCELLANEOUS TECHNICAL NOTES                |
   |------------------------------------------------------------|
   |   This controller has no jumpers. The controller feature   |
   |  number determines the boards formatted capacity. See the  |
   |    chart above for feature number specifications. This     |
   |  controller has a built-in low-level format program. Run   |
   |   the DEBUG utility supplied with DOS and at the prompt    |
   |                      enter: G=C800:5.                      |
   +------------------------------------------------------------+