The latest complete package for playing Standard MIDI Files under OS9/6809.

Two new programs:  MFF120 and MFPlay_mem.

New docs for MFF120, while the docs for MFPlay have been expanded to include
MFPlay_mem.

MFConv and MFPlay programs haven't needed updating but are included along with
original docs for MFConv for completeness.

Yep, now we can convert MFF1s to MFF0s!  And play 'em to boot!

--  thx, Paul Seniura.