Re: Weird/Missing colors on my Apple //e...

["IceMan" <toomuch@spam.here>]

    Linards,

    I tried setting the color switch back to MONO but my TV-VGA converter
has difficulty synching the signal (the message keeps coming up that there
is a video input but of unknown type, neither PAL nor NTSC) and the display
shifts up and down a few millimeters constantly. When I launch the color
test, the adapter detects a SECAM (!) video signal, the background goes blue
(black is blue), the colors are all super-saturated (white is orangeish) and
smudged.

    Evidently my VGA box doesn't like the signal and as you say there may be
too much 3.579 background which is disturbing it. I have a scope and will
analyse the output of my Apple II composite in both settings (MONO and
COLOUR) and see if there is background component.

    FYI my board is labeled Apple IIe P.A.L. (c) 1982 and the AUX socket is
inline with slot N.3, not to it's side as most of the ones I have seen (and
it supports lower case with the shift lock). Additionally, above the
mono/colour (SW1) switch there is a varicap, 2 pots and an 4.433619MHz Xtal.

    Thanks for the feedback.

    Luke

-- 
"Linards Ticmanis" <ticmanis@gmx.de> wrote in message
news:439ac98a$0$9647$9b4e6d93@newsread2.arcor-online.net...
> IceMan wrote:
>
> >    Sidenote: my Apple is a European version running on 220V/50Hz. My TV
to
> > VGA converter reports it's output composite signal as an NTSC signal (I
> > thought Euro models were PAL 50 scans - apparently they are all NTSC
> > anyways?). My converter is multistandard so it should handle the color
> > conversion correctly - but maybe this could be a problem? It looks as if
it
> > is a conversion problem as the color "time frames" may be shifted for
some
> > reason - or - it may be just some tuning I can work on.
>
> There is a strong frequency component in the PAL Apple video output at
> about 3.5625 MHz. Maybe your converter is mistaking this for a 3.579545
> MHz NTSC color carrier and then dutifully screws up.
>
> Try setting the color enable switch on the motherboard to OFF for once
> and then see if you still get any color output, and what standard the
> converter detects. If it's still NTSC, you've got a problem (as
> described above).
>
> -- 
> Linards Ticmanis