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Timing Diagrams. Visualizing 65xx Timing.
Posted: Mon Mar 17, 2014 8:15 pm
by Dr Jefyll
.
Visual Guide to 65xx CPU Timing
The animated "rubber band" diagrams in
this article are drawn to scale (unlike most in data sheets). They offer insight into real-world timing margins and the tradeoffs between them.
Comments and questions are welcome here in this forum topic. The article itself is subject to editing and re-editing if there's anything I've overlooked, and may be considered a work in progress.
Thanks, Garth and Ed, for your advance input on what I've written so far.
-- Jeff
Re: Timing Diagrams. Visualizing 65xx Timing.
Posted: Mon Mar 17, 2014 8:17 pm
by Dr Jefyll
( this null post is a placeholder I may use in future
)
Re: Timing Diagrams. Visualizing 65xx Timing.
Posted: Mon Mar 17, 2014 8:44 pm
by cr1901
Is this post in light of my misconceptions in the DMA thread?
Re: Timing Diagrams. Visualizing 65xx Timing.
Posted: Mon Mar 17, 2014 8:57 pm
by Dr Jefyll
Is this post in light of my misconceptions in the DMA thread?
No, some of these points have already been the subject of
discussion. But it can be a slippery topic to deal with piecemeal. That's why I wanted to try to clear the deck and lay out the basics. As for the diagrams, I know that's how I mentally visualize timing matters myself. So I decided to render them as GIF's, on the premise that a picture is worth 1,000 words. (or 1024 words maybe!)
Re: Timing Diagrams. Visualizing 65xx Timing.
Posted: Mon Mar 17, 2014 9:41 pm
by clockpulse
Nice work!
Re: Timing Diagrams. Visualizing 65xx Timing.
Posted: Tue Mar 18, 2014 12:30 am
by BigDumbDinosaur
Looks good. Guess you were staying up past bedtime to make timing charts.
Re: Timing Diagrams. Visualizing 65xx Timing.
Posted: Tue Mar 18, 2014 1:07 am
by Michael
Thank you, Jeff.
Re: Timing Diagrams. Visualizing 65xx Timing.
Posted: Tue Mar 18, 2014 8:27 am
by Tor
Superb. Thank you!
-Tor
Re: Timing Diagrams. Visualizing 65xx Timing.
Posted: Wed Mar 19, 2014 4:36 am
by Dr Jefyll
Cheers, fellas -- 'ppreciate the response.
I'm pleased with how the animated GIF's turned out. I just hope they render properly in all the various browsers out there. So far the only problem I've noticed is that GIF03 makes me seasick if I watch it too long!
-- Jeff