🚀 go-pugleaf

In article <832@nunki.usc.edu> rjung@castor.usc.edu (Robert Jung) writes:
>In article <880501030428.625908@HIS-PHOENIX-MULTICS.ARPA> Friesen%PCO@BCO-MULTICS.ARPA writes:
>>This is something I've been waiting for it to come out, and now I see
>>Electronic Arts has done it on the Amiga.  I think the colloquial term
>>is genlock.  If anyone knows how long until it comes out on the Atari or
>>how much it costs, please tell me, I am very interested.
>
>  Yes, this is called genlock. The idea is to take your ST's signal,
>synchronize it with your VCR/TV's signal, and blend the two together. Genlock
>
>  As for getting it NOW, I don't think there is such a beast avaliable.
>However, there are rumors that Antic (you know them guys, Spectrum 512,
>CAD 3D, all that terrific Atari stuff) is coming out with a genlock
>system for the ST.
>
Neither Antic nor Atari nor anyone else is going to genlock the ST unless
Atari engineering reworks the glue chip.  There have been several different
versions of the GLUE chip around and the very first rev. was able to be 
genlocked, but that version has not been made in over 2 years.  The only
way to genlock it now is with a frame synchronizer (read $5,000).  It 
appears that Atari does not plan to make the ST genlockable.  Maybe 
in the "new" machine it will be able to be genlocked "easily".

	I have spent many an hour hacking 2 ST's to get them to genlock
and I DID genlock the oldest one.  It was impossible to genlock anything
newer (higher rev number on the GLUE chip) than that though.  I even 
bought 2 new glue chips to verify it.  The display is impressive if 
everything is brought into the ST and is timed properly.  As I recall
the main crystal had to be changed along with the addition of a loose 
PLL circuit so that the crystal oscillator would  be a multiple of 
Horizontal Sync and then some  additional work had to be done
to the 3.58 circuit so that you could drive 3.58 into the ST to obtain
color lock.  There were a few other things that i seem to have
forgotten, but they must be trivial.   The biggest hassle was to get 
the "correct" master oscillator crystal cut.  I had to call a crystal 
house and had to have them cut the crystal for me.

If anyone needs any additional information, let me know.

Rich Andrews
Asst. Chief Engineer
WCFC-TV


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