Re: Blurry picture

From: Nicolas Welte <>
Date: Wed, 16 Nov 2011 22:01:28 +0100
Message-ID: <>
On 16.11.2011 18:00, Gerrit Heitsch wrote:
> On 11/16/2011 06:46 AM, Segher Boessenkool wrote:
>>> I read somewhere that 2 crystals resulted in poor picture quality
>>> compared to using a PLL and only one crystal. Never understood why.
>> I'm not sure if it is true, we only got hearsay.
> Well, one could try it out if one wanted... Supply the VIC with the normal
> dot clock from the 8701 and rig up a second 17,7x crystal to supply the
> color clock.

IIRC, the SX64 has two separate crystals on a clock module daughterboard, 
with some TTL logic.

But I don't think the SX has bad video quality on it's video port. I think 
older C64 have a more blurry output and the new c64c and c128 suffer from 
artifacts (vertical stripes).


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Received on 2011-11-16 22:00:09

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