[Coco] MC6847 VGA (FPGA) Project underway...

[Arthur Flexser]

SG6 never worked right in real CoCos, and I don't think there was a single
commercial program that used it.  Would it be possible to emulate the
6847T1 instead, which has the real lowercase in place of SG6?

Art

On Wed, May 25, 2016 at 11:11 PM, Brendan Donahe <brendan at polylith.com>
wrote:

> Ron,
>
> I just got PMODEs 0 and 2 working last weekend.  (That's RG2 and RG3 for
> the "purists" that follow the 6847 spec.)  All of the modes blessed by
> BASIC are working now.
>
> I'm working on the modes that are not directly supported by BASIC, such as
> SG6, CG1, CG2, and RG1.  Thankfully, as of last weekend, I have a test
> framework and a small test suite from Steve Spiller, who also reminded me
> of William Barden's Color Computer Graphics book.  Together, these have
> made it simpler for me to enable some of the graphics modes to try them out
> and discover what is still broken in the FPGA design.  There are also still
> some other small issues that Simon Jonassen has helped me identify through
> his demos, but all-in-all, the project is coming along.
>
> I have also gotten Ed a new FPGA image that should, in theory, be suitable
> for trying out the production boards - but I think you're right, Ed has a
> ton of hardware projects on his plate, so we will need to be patient.  ;)
>
> Thanks for asking!
>
> Brendan
>
>
>
> On Wed, May 25, 2016 at 9:37 PM, Ron Klein <ron at kdomain.org> wrote:
>
> > Hi Ed / Brendan,
> >
> > Any updates on this?  It was impressive as heck to see at CoCoFEST!
> >
> > ... it's not as if Ed doesn't already have too many things going on ...
> >
> > Thanks!
> >
> > -Ron
> >
> >
> > On Tue, Oct 13, 2015 at 1:30 PM, Brendan Donahe <brendan at polylith.com>
> > wrote:
> >
> > > *drool*  Thanks, Ed!
> > >
> > > On Tue, Oct 13, 2015 at 1:18 PM, Zippster <zippster278 at gmail.com>
> wrote:
> > >
> > > > I just got Brendan’s prototype board into the mail so he can further
> > > > develop
> > > > the code for the FPGA.
> > > >
> > > > Isn’t she pretty after her bath….  :)
> > > >
> > > > <https://drive.google.com/open?id=0B1sgl615FlGnOHlDQ1ZOMHU3RGs <
> > > > https://drive.google.com/open?id=0B1sgl615FlGnOHlDQ1ZOMHU3RGs>>
> > > >
> > > > - Ed
> > > >
> > > > --
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