Re: Apple ][ plus 13 sector! Problems...

[pausch@saaf.se (Paul Schlyter)]

In article <qhpt6rps8l.fsf@ruckus.brouhaha.com>,
Eric Smith  <eric-no-spam-for-me@brouhaha.com> wrote:
 
> Paul Schlyter <pausch@saaf.se> wrote:
>> Except on weird copy protected disk formats, were 9-bit self sync nibbles
>> ever used?
> 
> Andy McFadden <fadden@fadden.com> writes:
>> DOS 3.2 might have.  I don't remember.
> 
> Yes.  13-sector format used 9-bit self-sync.
 
Actually, that makes sense, since the 13-sector state machine PROM
was unable to handle more than one consecutive zero bit.
 
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