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

[Linards Ticmanis <ticmanis@gmx.de>]

Luke Forat wrote:

>     The pots are back to their original positions. You mention the squashed 
> 50Hz picture? The subcarrier crystal is a PAL one - I didn't notice any 
> squashing with the current settings on my TFT monitor - should there be? Is 
> this because the source "scan" is still NTSC and adapted to PAL just by 
> changing the subcarrier frequency?

No. The timings are more or less correct. However, the Apple can show a 
maximum of 192 active lines of picture information, the rest is black 
border; but on NTSC it's 192 out of about 243 maximally visible lines, 
on PAL it's more like 192 out of about 288. Since the screen width to 
height ratio is 4:3 in both cases, the NTSC Apple's active display area 
is taller in relation to its width than the PAL display. The broader 
borders are common among most older PAL things, for example the 
Commodore 64 has the same difference between the PAL and NTSC models.

I'm mailing you the PAL encoder schematics that a nice person from this 
group mailed to me a while ago.

--
Linards Ticmanis