[Coco] 6847 FPGA

[Luis Antoniosi (CoCoDemus)]

I think has a internal RAM that mirrors all bytes that show up in the 6847
address/data bus.

That would not work on coco, as there is page swapping but maybe on MC-10.

But..as the SAM is always doing DMA to the 6847 maybe it work on coco as
well. Only testing.



Luis Felipe Antoniosi




On Mon, Sep 8, 2014 at 11:55 AM, tim at franklinlabs.com <tim at franklinlabs.com>
wrote:

> I don't get the "video RAM at $8000-$9FFF" Does that mean it has internal
> video
> RAM and how would the user access it? How would it map into the DRAM of the
> CoCo? If it is as it claims then I would assume it would map the same way
> but
> the on-board video RAM confuses me a little.
>
>
> On September 8, 2014 at 11:43 AM Gene Heskett <gheskett at wdtv.com> wrote:
> > On Monday 08 September 2014 11:20:53 Luis Antoniosi (CoCoDemus) did opine
> > And Gene did reply:
> > > Hey all, I found this:
> > >
> > > https://github.com/hoglet67/AtomGodilVideo/wiki
> > >
> > > This FPGA boards connects direct into the 6847 slot and provides VGA
> > > output. I think it should work out of the box with our beloved cocos
> > > 1&2.
> > >
> > > It costs 49EUR though. But it's an interesting thing with extra
> > > features and 80x24 char output.
> > >
> > I read that as 80 x 40 lines. 49 EUR = in USD? would be a huge
> > improvement in a cc1 or cc2. Maybe even in the old grey ghost!
> > >
> > > Luis Felipe Antoniosi
> >
> >
> > Cheers, Gene Heskett
> > --
> > "There are four boxes to be used in defense of liberty:
> > soap, ballot, jury, and ammo. Please use in that order."
> > -Ed Howdershelt (Author)
> > Genes Web page <http://geneslinuxbox.net:6309/gene>
> > US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS
> >
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