[Coco] A Silly MC6847 to HDMI Conversion Idea
smostrom7 at comcast.net
Thu Aug 4 21:59:00 EDT 2016
Fun !! Are we getting closer to one possible Coco 4?
--- Steve ---
From: Dave Philipsen
Sent: Thursday, August 4, 2016 7:53 PM
To: CoCoList for Color Computer Enthusiasts
Subject: Re: [Coco] A Silly MC6847 to HDMI Conversion Idea
I think that's a cool idea. Not silly at all. I have often dreamt of the
same thing as well as a GIME plug-in that would do the same for the CoCo 3.
There are all kinds of possibilities here. You could have an option for
doubling the scan lines for a crisper text mode look, creating a higher
resolution font that is still 32x16 but smoother, lower-case option, fix
some of the undocumented SG modes, etc.
> On Aug 4, 2016, at 7:07 PM, Mark J. Blair <nf6x at nf6x.net> wrote:
> Last night I had a silly idea for making an FPGA-based module that would
> plug into the socket in place of an MC6847 or MC6847T1, emulating the
> original VDG while also generating clean HDMI output for connection to
> modern displays. It wouldn't necessarily add any new graphics modes, but
> it would allow very crisp HDMI output with proper emulation of the NTSC
> color aliasing effects.
> While I doubt that this idea is practical enough to actually bring it to
> reality (e.g., I would anticipate a total worldwide market for about one
> of these devices, counting myself), I do wonder whether anybody else has
> played with any sort of drop-in MC6847 replacements to add functionality
> to the CoCo 1/2 or any other vintage systems that used the MC6847.
> Mark J. Blair, NF6X <nf6x at nf6x.net>
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> Coco at maltedmedia.com
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