[Coco] RGB2VGA in FPGA, useful?

[Mark McDougall]

On 19/05/2013 11:43 PM, Luis Antoniosi (CoCoDemus) wrote:

> it says digital RGB (RGBI ?), so it wont show all coco3 palette.
>
> If that could be fixed this would be a good solution.

It's a simple line doubler. You can see from the source there's nothing to 
it. Plenty of FPGA arcade emulations do this internally for VGA output; I've 
got one in my Coco 1/2 project.

To increase the colour resolution, you simply need more pins, and more 
internal memory - everything else stays the same. Having said that, the 
EP2C5 is more than adequate even for 24-bit colour and 640 pixels/line.

Not sure about the cost effectiveness though!?!

Regards,

-- 
|              Mark McDougall                | "Electrical Engineers do it
|  <http://members.iinet.net.au/~msmcdoug>   |   with less resistance!"