[Coco] RGB2VGA in FPGA, useful?

[Luis Antoniosi (CoCoDemus)]

it says digital RGB (RGBI ?), so it wont show all coco3 palette.

If that could be fixed this would be a good solution.


On Sun, May 19, 2013 at 8:28 AM, S Klammer <sklammer at gmail.com> wrote:

> Could this be useful in a "v2" of Roy's adapter?
>
> This RGB to VGA adapter was designed upon an Altera FPGA for use with a BBC
> Micro (PAL) and has been released as open source.
>
> https://github.com/makestuff/rgb2vga
>
> >From the "ReadMe"...
>
> NATIVE DIGITAL RGB TO VGA CONVERTER
>
> This code accepts a pixel clock, R, G, B, HS and VS from an old computer
> and generates a VGA signal suitable for display on a modern monitor. The
> main caveat is that monitors to be used with PAL machines must be able to
> deal with a 50.000Hz vsync (many do, some do not).
>
> <...>
>
> This will build a .svf file suitable for loading into an Altera EP2C5 FPGA
> (e.g http://www.ebay.co.uk/itm/150835820710). Suitable level-shifting is
> required to protect the FPGA from any 5V signals. On the VGA side, a series
> 270R resistor on the R, G & B lines is all that's needed.
>
> Chris McClelland
> 2013-05-10
>
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>



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