[Coco] cga to vga converter

[Steven Hirsch]

On Sat, 2 Mar 2013, Luis Antoniosi (CoCoDemus) wrote:

> i have this one. it works if you combine (and invert) sync signals from
> your coco3.
>
> but the board has issues especially with scroll games (or moving sprites)
> where objects leave a ghost behind them.
>
> also this board generates A LOT of EMI (almost RFI) the coco3's composite
> output will dance in waves when this board is on :P
>
> but if what you want is to display 80 columns that's good enough. but not
> for games.

I have one of these converters here.  Interestingly, mine seems to only 
want the sync combined.  If I invert the result it doesn't work at all.

The picture is fine for 80 column text, but graphics that require aliasing 
of colors look awful.

Steve


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