[Coco] RGB to S-Video adapter Coco 3

[Fedor Steeman]

Thanks for the advice! I am still considering, but in principle I am willing
to pay for Christopher's labour and all shipping costs, even if only to make
sure this is possible. There aren't many PAL CoCo3's around and neither CM-8
monitors, so good to have this alternative.

BTW does anyone what other colour monitors can, perhaps with modification,
be used to hook up to a CoCo3?

Cheers,

Fedor

On 25/05/06, Frank Pittel <fwp at deepthought.com> wrote:
>
> John,
>
> While I'm not Chris and I don't speak for him. I do however recall
> seeing an email from him stating that while he would be willing to
> make that change needed to output PAL he had no way of testing it and
> as a result couldn't guarantee that it would work.
>
> Frank
>
>
>
> On Wed, May 24, 2006 at 08:04:56PM -0400, John Kowalski wrote:
> > Hi Fedor,
> >
> > All it would require to convert the RGB-to-Svideo circuit to output PAL
> > instead of NTSC would be to replace the 3.579545 Mhz crystal with a
> 4.433619
> > Mhz one, cut the trace going to pin 1 of the AD724 chip and then rewire
> pin
> > 1 to ground.
> >
> > I can't say Chris would do it, because I'm not him - but I'm 99% sure
> this
> > modification would just work the first time without having to send it
> back
> > for an adjustment.
> >
> >
> > At 08:45 PM 24/05/2006 +0200, CoCoList for Color Computer Enthusiasts
> wrote:
> > >Hi Chris,
> > >
> > >Thanks. Would that mean, in theory, that one can take a CoCo3 that
> normally
> > >sends an NTSC signal through its antenna cable and composite video
> outputs,
> > >hook up the adapter to the RGB output and have the screen displayed on
> a PAL
> > >television?
> > >
> > >I think I would be interested in this even if it would mean having to
> send
> > >it back and forth a couple of times. What do you think?
> > >
> > >Cheers,
> > >
> > >Fedor
> > >
> > >
> > >On 23/05/06, Christopher Hawks <chawks at dls.net> wrote:
> > >>
> > >> Fedor Steeman wrote:
> > >> > What's this thing about a RGB to S-Video adapter for the Coco 3?
> Where
> > >> > can I
> > >> > get it? Does it work on PAL teevees too?
> > >>
> > >> Fedor:
> > >>
> > >>         Sock Master (John Kowalski) posted a message (way back, 13
> Dec
> > >> 2005 ??)
> > >> about pulling S-Video from the RGB-to-PAL daughterboard. I _could_
> build
> > >> the RGB to S-Video adapter for PAL (simple changes to the circuit),
> but,
> > >> have no way to test it.
> > >>
> > >> --
> > >> Christopher R. Hawks
> > >> HAWKSoft
> > >> ---------------------------------------------------------
> > >> DOS: n., A small annoying boot virus that causes random spontaneous
> system
> > >>       crashes, usually just before saving a massive project.  Easily
> > >> cured by
> > >>       UNIX.  See also MS-DOS, IBM-DOS, DR-DOS.
> > >>         -- David Vicker's .plan
> > >>
> >
> >                                          John Kowalski (Sock Master)
> >
> http://www.axess.com/twilight/sock/
> >
> >
> > --
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>
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