[Coco] For those of you following the RGB2VGA FPGA

S Klammer sklammer at gmail.com
Mon Sep 29 09:51:07 EDT 2014


Looking forward to your further progress.  Is it possible for a mode to
emulate the NTSC composite artifacting, for example, in PMODE 4?

Shain
On Sep 29, 2014 7:52 AM, "Luis Antoniosi (CoCoDemus)" <
retrocanada76 at gmail.com> wrote:

> I started to test with my MSX2+, is working but I'm getting RGB voltage
> issues. Seems they are higher on this machine and I get full white only.
>
> Luis Felipe Antoniosi
>
>
>
> On Mon, Sep 29, 2014 at 4:03 AM, Nick Marentes <nickma2 at optusnet.com.au>
> wrote:
>
> > 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
> >>
> >>
> >
> > --
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> > Coco at maltedmedia.com
> > https://pairlist5.pair.net/mailman/listinfo/coco
> >
>
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