[Coco] video composite on korean coco 26-3134A

[Luis Antoniosi (CoCoDemus)]

the PAL machines have an extra chip on it connected to the 6847 as this one
cannot generate 50 Hz PAL video.

Luis Felipe Antoniosi



On Sat, Oct 4, 2014 at 9:50 AM, Zippster <zippster278 at gmail.com> wrote:

> The crystal on the motherboard should tell you wether it’s PAL or NTSC.
> It’s divided by 4 for the subcarrier frequency.
>
> 14.31818mhz = NTSC, PAL should be 17.73448mhz
>
> - Ed
>
>
>
> On Oct 4, 2014, at 8:05 AM, Bruce W. Calkins <brucewcalkins at charter.net>
> wrote:
>
> > If it is a 50 Hz power supply the TV output is probably useing the
> European PAL standard.
> >
> > Bruce W.
> >
> > ==================
> >
> >
> >
> > ----- Original Message -----
> > From: "didier derny"
> >
> > I tried, I was not expecting a correct image, but at least something
> like a
> > synchro
> > But nothing, just snow...
> >
> > The tv see a "VCR" but no signal
> >
> > Any idea if the modulator or the coco uses the 60hz ?
> > The power supply is 110v but 50Hz
> >
> > That's why I have a serious doubt about this machine...
> >
> > --
> > didier
> >
> > -----Message d'origine-----
> > De : Coco [mailto:coco-bounces at maltedmedia.com] De la part de Zippster
> > Envoyé : samedi 4 octobre 2014 00:17
> > À : CoCoList for Color Computer Enthusiasts
> > Objet : Re: [Coco] video composite on korean coco 26-3134A
> >
> > You could rig up a quick and dirty piece of coax cable from the RF port
> to
> > the antenna in jack on a tv and tune it to channel 3 or 4 (whatever the
> > switch is on).  The picture may not even be that bad.
> >
> > Or the relay.
> >
> >
> > -Ed
> >
> >
> > ---
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> >
> >
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>
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