[Coco] Bad news, good news...

[jdaggett at gate.net]

John 

How are you weighting the RGB signals when mixing? 

If using op amps which ones?

james

On 13 Dec 2005 at 23:05, John Kowalski wrote:

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Subject:        	Re: [Coco] Bad news, good news...
Date sent:      	Tue, 13 Dec 2005 23:05:14 -0500 (EST)
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> Nick Marentes was nice enough to rip the RGB-to-PAL daughter board out
> of one of his PAL CoCo3s and sent it to me.  I just changed the
> crystal to 3.58Mhz, cut a trace to switch the chip to NTSC mode, added
> a power supply and cables and put it in a project box. This generates
> very nice composite video, but the chip inside also generates a chroma
> signal, so I simply tapped that for S-Video.  I didn't find any place
> to tap a luma signal, so I have a seperate circuit that mixes RGB into
> monochrome video which I use as luma.