Re: CBM720 heads up

From: A. Fachat <>
Date: Thu, 30 Oct 2014 22:51:19 +0100
Message-ID: <2106453.XPT4pMMh2l@euler>

On Thursday 30 October 2014 07:18:31 A. Fachat wrote:
> As the commands work and scrolling reveals the previously hidden screen
> content I suspect either the address multplexer or the CRTC itself. I'll
> check that today or tomorrow.

Unfortunately I think it's the CRTC. The CRTC's video address line MA8 does 
not show a good signal at all, compared to other signals next to it, as well 
as to the other input of the address multiplexer. 

So I guess I have to replace the CRTC then.


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Received on 2014-10-30 22:00:03

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