On Tue, 26 Jan 2016, Chuck Guzis wrote:
So did Intel on the MDS. I don't recall if there
was any significant
difference between Intel and HP MMFM encoding, however.
The initial CRC value ($0000 vs. $FFFF) and the header (six vs. four
bytes) are different, but the encoding was quite identical. The Intel
header format was similar (or even the same) as the "standard"
soft-sectored formats (i.e. with head and sector length bytes). The HP
format knows only single-sided floppies with up to 32 sectors (0 to 31).
The address mark bytes are different, too.
Christian