Re: Innovative Amiga genlocking

From: Gerrit Heitsch <gerrit_at_laosinh.s.bawue.de>
Date: Mon, 6 Nov 2017 19:23:49 +0100
Message-ID: <53d00251-b757-bd62-c4e0-58d425e46c3b@laosinh.s.bawue.de>
On 11/06/2017 07:07 PM, silverdr@wfmh.org.pl wrote:
> 
> 1) smf wrote that there may be no way for the Amiga to accept the clock and output the sync. I haven't tested that but if true, then this alone might void the whole idea.

Why not? I'm looking a the schematics for the A500+. There the Circuit 
to switch between the internal crystal and external clock is a 74F258. 
That means that the 8375 AGNUS doesn't know what clock it's running on 
and should happily produce sync even with external clock. Same for the 
A1000.

The 8371 and 8372 seem to do this internally, but the question is, is it 
more than this simple circuit?

  Gerrit


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