Date   : Wed, 19 Aug 1992 06:32:19 GMT
From   : access.usask.ca!ccu.umanitoba.ca!shad04@decwrl.dec.com (Dan Fandrich)
Subject: Re: C128/CPM FILES ON GCR FORMAT TO CPM MFM FORMAT

In article <13380@pogo.wv.tek.com> rickc@pogo.wv.tek.com (Rick Clements)
writes:
>First, you need a 1571 for 5.25" disks.  Or, a 1581 for 3.5" disks.  The 1541
>drive WON'T handle MFM disks.

...in the general case.  By adding a jumper on the 1541 circuit board to
selectively double the data clock rate, it's possible to read MFM disks.
The jumper doesn't affect normal 1541 operation in the slightest.  I did this
to prove it could be done, then went on to other things.  If someone is 
interested in pursuing this further, I could put a package together of 
relevant information.  Of course, I expect a hefty royalty when the Big Bucks
start coming in :-)

>>> Dan
-- 
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