[Coco] Cross Post from the Facebook Page about the RGB2VGA Board

[Steve Batson]

I changed the last 4 resistors and didn't really notice much difference, but since values were based on Roger's research and testing and that his board is now solid, I figured I'd do the same. I've Tested all of the features and it's incredible results.

The output is rock solid. Colors are Rich. Text looks fantastic in 32, 40 and 80 columns. I've tested Zaxxon, Grabber, Tetra3, Brewmaster, Donkey King. And The biggie, Sockmaster's port of the Original Donkey Kong and it Looks Awesome! Very happy with the results of this thing. It was a lot of work, but it was well worth it.




On Jul 9, 2015, at 8:45 PM, Steve Batson <steve at batsonphotography.com> wrote:

> I figured I'd post the following here too. Some discussion occurred on the FB page, but a lot of discussion was done between Roger and Myself in email as Roger made several discoveries that stabilized some very annoying jitter problems with video.
> 
> RGB2VGA Stabilized!
> First thanks to Felipe for a very cool Solution to bring the CoCo3 video to Modern VGA Monitors. Originally, I missed a few resistors that I somehow thought were optional and Felipe straightened me out on those. 
> Then I was getting Jitter just like Roger was experiencing. I had several email discussions with Roger as he was doing some research and experimenting based on what he found about the VGA standards and found that changing some resistor values stabilized the output from his board. I have pretty much duplicated Roger's resistor values on my board with the exception of 4 that I'm waiting to come in, but mine is crisp and jitter is gone. I will most likely change those 4 resistors when the parts come in unless it doesn't make sense.
> Anyway, Finally fantastic output on my VGA monitor. Very Cool!!!
> Very Big thanks to Roger!!!
> 
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