[Coco] 6847 FPGA

[Zippster]

What would be really neat would be an FPGA that plugged directly into the
MC6847 socket, and emulated only the 6847.  With VGA output on the board
that plugs into the socket of course.

Then it could be used as an easy drop in VGA adapter for any MC6847.

I’m not familiar with programming FPGA’s yet, but is there easily obtainable
code for emulating the 6847?  What FPGA would be most suitable?

Ed


On Sep 8, 2014, at 11:00 AM, Phill Harvey-Smith <afra at ramoth.org.uk> wrote:

> On 08/09/2014 16:20, Luis Antoniosi (CoCoDemus) wrote:
>> 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 know the person that developed that, one thing to note is that it is designed to be used in the Atom, where the 6847 fetches the data directly from the video RAM, not using the SAM to do DMA like the CoCo / Dragons etc.
> 
> Though this implementation has the video RAM within the FPGA, it has not been tested in combination with a SAM and so would need some work to get it going.
> 
> Cheers.
> 
> Phill.
> 
> 
> 
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