[Coco] Coco 1 video problem.. Wrong artifact colors???

Mark Ormond markormond at mtxsystems.com
Fri Sep 2 10:53:30 EDT 2011

Not a pal unit, if so I would get no video at all on the tv correct?
The Unit outputs fine on channel 4, and the green boot color looks fine, but the blue artifact color is screwed up.
Red looks red, blue is green.

Also the wiki says

"Users in PAL countries saw green and purple stripes instead of solid red and blue colors."

That's not my symptoms.

-----Original Message-----
From: coco-bounces at maltedmedia.com [mailto:coco-bounces at maltedmedia.com] On Behalf Of Robert Gault
Sent: Friday, September 02, 2011 9:48 AM
To: CoCoList for Color Computer Enthusiasts
Subject: Re: [Coco] Coco 1 video problem.. Wrong artifact colors???

Mark Ormond wrote:
> I got a coco 1 that I posted about the other day and it doesn't display Blue as a artifact color but green.
> (easiest case to point out, using the downland cart, the startup text is either red, or green.)
> I've swapped the 6847 and 1372 from a known good coco2, but the colors stay the same.
> The tv works fine with my other cocos.
> Any suggestions?

Open it up and see if it is a PAL unit. I seem to remember that the artifact 
colors on PAL units do this.

You could adjust the tint control on your TV. That might get you the required 

Coco mailing list
Coco at maltedmedia.com

More information about the Coco mailing list