[Coco] For those of you following the RGB2VGA FPGA

[Nick Marentes]

The quality of your card is very good. Very sharp and clean. It's 
obviously been tailored to suit the CoCo3 video.

It's color spectrum is it's biggest problem.

I think that for most OS-9 users though, it's ability to represent the 8 
digital colors very well will be enough. Just don't plan on running many 
of the games such as Koronis Rift, Thexder and the Sierra adventures... 
although the Sierra adventures are mainly 8 digital colors with 2 levels 
of brightness so they may be ok (EGA 16 colors).

I have an Amiga and have a flicker fixer installed. I tried connecting 
an LCD monitor to it and although it works fine, the quality of 
upscaling from a non native resolution to the LCD panel resolution is 
downright ugly.

In the end, I found a very cheap (free!) LG CRT 15" monitor with high 
quality built in stereo speakers and the image (and sound) quality is 
brilliant! The Amiga works best on VGA LCD if you have a proper video 
card that can deliver native LCD resolution.

And likewise on the CoCo3, I'll stick to CRT here too. I have a Tandy 
CM-8 (which is a pretty low grade RGB monitor) but connecting it to a 
Amiga 1084 yields better results. I'm happy with my original CM-8 though.

A CoCo 1/2 to VGA converter would be good. It only has the 8 colors so 
your VGA adapter would be good.
I assume that a VGA adaptor for this will require tapping to the 
internals to derive the necessary luma and chroma signals.

Nick


On 29/09/2014 4:17 PM, Luis Antoniosi (CoCoDemus) wrote:
> You can buy one for 80 dollars.
>
> But I'm not aiming any production batch or commercial product. What I
> wanted to do is to master the technology and not be slave of any other
> device. Also I want to make a VGA converter for the coco2.
>
> It will be hard to get the full coco3 color spectrum but I would be very
> happy If I could remove most of the noise. What I know now from where is it
> coming.
>
>
> Luis Felipe Antoniosi
>