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AST RESEARCH TECHNICAL BULLETIN TB-0259          02/09/87



PREMIUM 286 / NEC FD1155C FLOPPY DISK DRIVE JUMMPER SETTINGS


               ????????????  ?????????????????????
               ????????????  ?    ?- TERMINATOR  ?
          ??????2  1      ????                  ?
          ?      ??.  ...?. ?.???????            ?
          ?           ...?. ?.?  ?  ??????????????
          ???         x3210 21????????
            ?                        ?
            ?                 ????????
            ?                 ?
            ?                 ?
            ? ?1              ?
          ??? ?   1.. ??1 ?????
          ?   .2  2?? ..2 ?
          ?       3.. ..3 ?
          ?       4.. ??1 ?
          ?       5?? ..2 ?
          ?               ?
          ?               ?
          ?               ?  FD 1155C PRINTED CIRCUIT BOARD
          ?               ?
          ?               ?
          ?           ?.. ?
          ?           ?.. ??
          ?           321  ?
          ?                ?
          ?                ?
          ??               ?
          ??               ?
          ?                ?
          ?                ?
          ?                ??????
          ?                     ?
          ?                     ?
          ???????????????????????


NOTES:
1. AST has determined that the jumper settings shown above
   will provide the most reliable operation of the Floppy Disk
   drive. This configuration improves the compatibility between
   360KB diskettes used in this drive and 360KB drives.

2. CAUTION: Writing from a 1.2 MB drive to a diskette
   formatted on a 360KB drive might make the diskette
   unreadable on a 360KB drive.

3. When adding a second floppy drive, remove the terminating
   resistor "?"  from the first drive and reinstall in the
   second drive.