[Coco] RGB-to-VGA converter

[J.P. Samson]

On Aug-31-09, at 6:13 AM, Christian Lesage wrote:
> Steven Hirsch wrote:
>>
>> I rolled my own solution for displaying CoCo video on a modern LCD  
>> display and I agree completely - a great improvement in the viewing  
>> experience.
>
> Could you provide us with some details?


For anyone who's interested, I've pulled up some of the relevant  
messages...

.....

On Nov-15-08, Steven Hirsch wrote:
> This morning I finally got motivated and built an adapter to run RGB  
> video from my CoCo 3 into the Wei-Ya ACV-011 RGB-->VGA converter.   
> I'm pleased to report that it works quite well!
>
> 40-column text does not fill the display, but 80-column mode runs  
> right to the edges and looks terrific.  These little boards are  
> about $70 from the distributor and require a 12VDC wall-wart power  
> supply.  I mounted mine in a Radio Shmacked project box.
>
> FWIW, I'm using a Dell 17" LCD display.

.....

> There's not a whole lot to write up...  It's just a matter of  
> building a cable with a 10-pin ribbon cable header on one end.  If  
> you are not sharing the converter with other classic machines, you  
> just splice the other end to the header supplied with the converter  
> board.  The signals are just 1:1, connect Gnd, R, G, B, H-sync and V- 
> sync and you're good to go.  The pinout for the bottom of the CoCo 3  
> is widely available.
>
> The converter board has a PC mounted power jack for the wall-wart  
> and a female VGA connector for the monitor.  No assembly required  
> except for a box if you so choose.
>
> I have seen Roy's converter on a web page, but was not aware of it  
> when I started the project to replace all my aging/dying CRTs.   
> Also, I have the impression that it's specific for the CoCo and I  
> need something that would work with any 15Khz. analog RGB source.  I  
> did have to build a little board to convert digital RGBI from the  
> C128 to analog RGB.  It just sits between the Commodore and the Wei- 
> Ya converter (I do have to switch plugs when going from the C128 to  
> the CoCo).