Re: 6561 (PAL VIC-I) interlace mode bit

From: Segher Boessenkool <>
Date: Fri, 26 Aug 2011 18:04:08 +0200
Message-Id: <>
>> I've looked at the Y decoder on the 6561 (PAL) chip.
> Sorry if I didn't follow the discussion, but what does "look" mean?

Look at this: 

(I don't make the pictures, I just look at them, fwiw).

> Are you opening up the chip and looking with an electron  
> microscope, using some kind of oscilloscope or some other means to  
> tap what's going on inside? I mean, is this a process other people  
> could perform too or would you need samples of chips to analyze?

It's just optical pictures.  The chip will usually become non-functional
(imaging a broken chip is just fine as well though, unless you managed
to blow it up really catastrophically :-) )


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Received on 2011-08-26 17:00:12

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