[Coco] WIP - RGB2VGA 800x600

[David Ladd]

On Wed, Oct 28, 2015 at 2:28 AM, CoCo Demus <retrocanada76 at gmail.com> wrote:

> Hi all RGB2VGA makers,
>
> This is experimental and has not been tested in more than 2 monitors (the
> ​​
>
> ones I have here).
>
> But this code below gives you 800x600 output. No modification needed, just
> upload the code below using quartus/usb blaster.
>
> It's the .sof (temporary) yet but when finished I will publish a branch on
> github with the .jic
>
>
> https://sites.google.com/site/tandycocoloco/dropbox/rgb2vga.sof?attredirects=0&d=1


So far from the testing I have done I actually like the looks of it better
at 800x600 for sure on my HDTV.

Now on the 32 column screen if I do a CLS3
I get a blue background, but the blue does seem a bit distorted.  Same goes
for CLS4.

This is all I have tested thus far that I have noticed anyway :D  Going to
start doing the CLS#'s in width 80 in a little bit.

Thanks for the new stuff :D  I will try digging out my MM/1 again and see
how it works with this 800x600 video.



>
>
> The screen gets smaller, there is no stretch algorithm but you get the full
> borders around and not problem with overscan too left or too right.
>
> Check also the color stability. You can play predator or rampage and check
> the beautiful stable colors. There is a small residual jitter on 80 colum
> mode (if compared to the current head version in 640x480) but still very
> good.
>
> This is due to QuartusII 15.0 be able to generate a better and optimized
> code.
>
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>