OK, Friedel, there are two major diferencies between VGA and EGA.
EGA have RGB digital ( TTL level)=20
VGA have analogic RGB up to 0.7V or 1V
If you have a little experience you could easily modify the video input
stage of a VGA monitor to work proper with EGA signals
The second and major difference is the synchronisation frequency.
But any multisync VGA monitor will syncronise with EGA signals.
So the only diference is changing the RGB levels to digital. You could do
it on an external board using some fast comparators.

Vasile


On Thu, 15 Nov 2001, Friedel Bruening wrote:

> Seems I have not expressed good enough what=B4s the task,
> I need to use whatever VGA screen on an EGA card, which
> I can not change out for some reason.
> So what I need is some type of a converter which converts
> the EGA output to a VGA signal, to be able to use
> whatever VGA screen, preferbly a LCD flat panel.
>=20
> At 10:13 a.m. 15/11/01 -0500, you wrote:
> >I'm not sure that newer cards will output EGA signals.  Older VGA cards=
=20
> >did output EGA with an adaptor, but of course only at EGA resolutions an=
d=20
> >color depth.  You should look first at the chipset you plan on using to=
=20
> >see if it's capable of EGA.  If it is, then it'll probably give enough=
=20
> >information for you to make an adaptor, but then you'll have to deal wit=
h=20
> >drivers and such.
> >
> >It's better to get an old EGA card, or VGA with EGA out.
> >
> >-Adam
> >
> >Friedel Bruening wrote:
> >
> >>Hi all,
> >>anyone every has done a EGA to VGA converter, or knows where to find,
> >>I know it=B4s kind of a strange thing, but ...
> >>I need to use a standard VGA screen on a EGA output
> >>I spend some time searching the net, but have not found anything useful=
=2E
> >>
> >>Thanks in ahead
> >>
> >>Friedel
> >>
> >>
> >>Friedel Bruening
> >>Bolivian Instruments
> >>Casilla 4856
> >>Santa Cruz
> >>Bolivia
> >>
> >>Tel : 00591-773-92119
> >>Fax: 00591-3-3580572
> >>e-mail : bolinst@cotas.com.bo
> >>
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> >>
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>=20
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>=20
>=20

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