Xerox 820-II diskette formats

[Chuck Guzis]

The 820-II 8" samples in my library show 77*1*26*256 and 77*2*26*256 
formats.  My 820-II drives were originally SA-800 single-sided 
models, replaced with double-sided units.

I believe that alternative ROMS were also offered by third parties.  
I believe that there might be source code for the BIOS ROM for the 
820-II wandering around also.  There certainly is for the Ferguson 
Big Board, which is a close relative.

--Chuck