Path: utzoo!utgpu!watserv1!watmath!maytag!vlsi!watale!sunee!sjorr
From: sjorr@sunee.waterloo.edu (Stephen_Orr)
Newsgroups: comp.sys.amiga.tech
Subject: Re: How does the blitter decode/encode MFM data?
Message-ID: <242@sunee.waterloo.edu>
Date: 16 Jan 90 20:20:23 GMT
References: <75676@tut.cis.ohio-state.edu>
Reply-To: sjorr@sunee.waterloo.edu (Stephen_Orr)
Organization: U. of Waterloo, Ontario
Lines: 11

The blitter first copies the track next to itself, and shifts that second
section by one bit. This means that in the first section you have all of
the odd bits (in the odd bit positions), and in the second section you
have all of the even bits (also in odd bit positions). This is then 'clocked'
and written out to the drive.

An article on this very topic (and the source of my knowledge) was written
by Betty Clay, and appears in V3 I1 of the Amiga Transactor.


						Stephen