Date   : Wed, 18 Jan 1984 08:10:00 EST
From   : Damouth.Wbst@PARC-MAXC.ARPA
Subject: Re: Function 37 - disk door open

" .  .  monitoring the sector hole sensor .  .  .  works for any floppy,
regardless of size ."

Sorry - not true.   You forget that some 5 1/4" drives are soft
sectored.  The Apple II drives are not only soft sectored, they don't
even use the once-per-revolution index hole.

/Dave