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Re: Hardware musings

Matthew Russotto wrote:

In article <aJKdnTNJ_tZU6qXYnZ2dnUVZ_o2dnZ2d@comcast.com>,
Michael J. Mahon <mjmahon@aol.com> wrote:



There is the potential for writing a track with ambiguous nibble sync,
in the sense that it could be read with nibbles synced in more than one
way.  I don't know of any program that uses such a technique, but it is
possible. 


I ran into one such, the driver disk for a speech recognizer.  It
didn't seem to have any self-sync nybbles.  It was slow as heck
running its modified DOS (which I presumed, but didn't prove, tried
every possibility until sectors started reading).  Since it used a
normal DOS filesystem, I was able to copy it file by file to a regular
disk, using a cassette tape for an intermediary.


A very creative solution!

That would be a natural for a "swap controller" that swaps
between the protected RWTS for reading and a normal RWTS
for writing.

-michael

NadaNet networking for Apple II computers!
Home page:  http://members.aol.com/MJMahon/

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