Re: RGB output from C64

From: Nejat Dilek <imruon_at_gmail.com>
Date: Mon, 11 Mar 2019 01:53:25 +0300
Message-ID: <CAP5r8NRuucOt=HWCxYYCAtq=3eG6KrzFOYesTLH-JkWFaPis5A@mail.gmail.com>
By the way, that's already done by a fellow forum member.
Skip to the 1:40 in the video. Video signal is sampled by a FPGA and
the RGB image is constructed with a line buffer.
https://www.youtube.com/watch?v=m3WKGK-J-IA

Regards,

Nejat

On Sun, Mar 10, 2019 at 10:15 PM Mia Magnusson <mia@plea.se> wrote:
>
> Den Sun, 10 Mar 2019 12:32:28 -0500 skrev Segher Boessenkool
> <segher@kernel.crashing.org>:
> > On Sun, Mar 10, 2019 at 05:57:09PM +0100, groepaz@gmx.net wrote:
> > > Would be interesting to see some details on how it works (i am
> > > hoping for something else than plain VICII emulation... it could be
> > > a nice way to make pixel perfect screenshots from a real VICII
> > > eventually)
> >
> > It has to be emulation, a lot of state is needed to create the picture
> > that cannot be seen from anything happening on the pins (like ECM/MCM
> > modes, sprite X coordinate, sprite/data priority), so all that has to
> > be emulated, and you are looking at pretty much all of a VIC-II by
> > then. (Well, you don't need anything for accessing memory of course,
> > all that is done by the real chip and you can sniff it).
>
> On the other hand, the S-video signal out from the VIC-II is really
> enough to "know" what's going on, and it could most likely be sampled
> and cleaned, and PAL/NTSC demodulated, to generate a perfect signal.
>
> With some automatic level detection, the hardware could learn how the
> signals from the VIC-II particular actually look re unwanted stripes
> and similar problems. I.e. a kind of auto-lumafix.
>
>
> --
> (\_/) Copy the bunny to your mails to help
> (O.o) him achieve world domination.
> (> <) Come join the dark side.
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>
Received on 2019-03-11 00:00:03

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