Date   : Thu, 22 Nov 1990 03:05:05 GMT
From   : mvb.saic.com!ncr-sd!simasd!simasd!pnet07!donm@ucsd.edu (Don Maslin)
Subject: BigBoard II

The WD1771 FDC controller used in the Big Board is the same as used in
the Xerox 820 and is capable of using 5.25" floppies.  What needs to be
done is to cut the data transfer rate from the 8" rate (500,000K bps) to
the 5.25" rate (250,000K bps) and, obviously, accommodate the 34 pin
connector on the 5.25" drive.
 
If you can find someone with schematics for the Xerox 820, you can see
exactly how they did it.
 
Emerald Microware, 12470 SW First, Beaverton OR 97005 sells parts,
software, and/or a kit to install a HD in the Xerox 820, amongst others,
which would perhaps work with the BB.  Others may also.
 
Good luck.
 

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