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

[Steve Batson]

John,

Trust me, unless you have something else wrong with the board, Roger's recommended resistor changes will clean things right up. Mine looks awesome and I simply duplicated his changes. Since I had a few resistor changes, I may end up buying another board and building one up fresh with the right resistors the first time. The board will certainly look better and it won't hurt to have a spare. I'm not going to buy a spare FPGA though...hehehehe...that's a bit pricey.

On Jul 11, 2015, at 9:48 PM, John B <trymyz at gmail.com> wrote:

> Definitely great news.  Hopefully the new resistors will take care of my
> jitter/wavy lines and text problem.  I will find out next week.
> 
> On Sun, Jul 12, 2015 at 12:42 AM, Steve Batson via Coco <
> coco at maltedmedia.com> wrote:
> 
>> 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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