[Coco] A Silly MC6847 to HDMI Conversion Idea

Dave Philipsen dave at davebiz.com
Thu Aug 4 22:40:56 EDT 2016

Just my opinion but I would say that Gary's FPGA project is pretty much 
there now.  Gary has proven himself more than willing to correct 
incompatibilities if people bring them to his attention.  He has done an 
enormous amount of work on it and the more people that come on board the 
faster it will get refined.


On 8/4/2016 8:59 PM, Steve Ostrom wrote:
> Fun !!  Are we getting closer to one possible Coco 4?
> --- Steve ---
> -----Original Message----- 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.
> Dave Philipsen
>> 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>
>> http://www.nf6x.net/
>> -- 
>> Coco mailing list
>> Coco at maltedmedia.com
>> https://pairlist5.pair.net/mailman/listinfo/coco

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