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Uzebox PAL support

Posted: Thu Aug 28, 2008 5:53 am
by uze6666
Anybody interested in porting the Uzebox to PAL? The AD725 supports it with a simple logical pin.In fact, most work would have to be done in software. I'm sure someone would be willing to do it (like me :P ), but where can we get PAL enabled devices in north America?

Re: Uzebox PAL support

Posted: Thu Aug 28, 2008 10:52 am
by ekros
uze, I live in Europe so I'll have to port uzebox to PAL if I want to see some colors on the screen :)
I'll tell you about my progresses with it, but first I've to build the hardware!! :D

Re: Uzebox PAL support

Posted: Thu Aug 28, 2008 2:48 pm
by uze6666
The problem will be the kernel's video timing interrupt, its very precise. One cpu cycle more or less and the image screws up! :?

Re: Uzebox PAL support

Posted: Thu Aug 28, 2008 6:13 pm
by CompMan
Why not buy an NTSC to PAL converter box? I found one for $30.00 USD http://sewelldirect.com/MayFlash-NTSC-t ... verter.asp.

Cheers,
Compman

Re: Uzebox PAL support

Posted: Fri Aug 29, 2008 9:41 am
by Everblue
Correct me if I'm wrong - does PAL even need the AD725? If there is RGB on the board, then why not let it output RGB to RGB60 via Scart? Much better picture, cheaper solution!

Re: Uzebox PAL support

Posted: Fri Aug 29, 2008 9:47 am
by CompMan
I would have to look into it a bit further but it sounds like a possible option.

Compman

Re: Uzebox PAL support

Posted: Fri Aug 29, 2008 9:48 am
by Everblue
Cheers - let us know :)

Re: Uzebox PAL support

Posted: Fri Aug 29, 2008 11:00 pm
by uze6666
I was looking at the AD725 doc and realized that for PAL it requires around 18Mhz. Doubling that, as required by the software, would give ~36Mhz! I didnt' try it, but I seriously doubt the mega644 will work at that speed. So the only other alternative would be to develop something for the RGB SCART like everblue said. I saw a project on net the other day doing just that. This will however require a rewrite of most sync and rendering code, not for the feint of heart :) . As compman suggested, if you're not too inclined in spending so much efforts, a NTSC-to-PAL is your best bet.

Cheers,

Uze

Re: Uzebox PAL support

Posted: Sat Aug 30, 2008 8:34 am
by Everblue
My PAL TV handles NTSC signal no problem :D

Re: Uzebox PAL support

Posted: Sun Aug 31, 2008 3:37 pm
by Tinctu
It is not problem with new TVs here in EUROPE.
But I am interesting.
You can make that switch NTSC/PAL...