Uzebox PAL support

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uze6666
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Uzebox PAL support

Post by uze6666 » Thu Aug 28, 2008 5:53 am

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?

ekros
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Re: Uzebox PAL support

Post by ekros » Thu Aug 28, 2008 10:52 am

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

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Re: Uzebox PAL support

Post by uze6666 » Thu Aug 28, 2008 2:48 pm

The problem will be the kernel's video timing interrupt, its very precise. One cpu cycle more or less and the image screws up! :?

CompMan
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Re: Uzebox PAL support

Post by CompMan » Thu Aug 28, 2008 6:13 pm

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

Everblue
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Re: Uzebox PAL support

Post by Everblue » Fri Aug 29, 2008 9:41 am

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!

CompMan
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Re: Uzebox PAL support

Post by CompMan » Fri Aug 29, 2008 9:47 am

I would have to look into it a bit further but it sounds like a possible option.

Compman

Everblue
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Re: Uzebox PAL support

Post by Everblue » Fri Aug 29, 2008 9:48 am

Cheers - let us know :)

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uze6666
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Re: Uzebox PAL support

Post by uze6666 » Fri Aug 29, 2008 11:00 pm

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

Everblue
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Re: Uzebox PAL support

Post by Everblue » Sat Aug 30, 2008 8:34 am

My PAL TV handles NTSC signal no problem :D

Tinctu
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Re: Uzebox PAL support

Post by Tinctu » Sun Aug 31, 2008 3:37 pm

It is not problem with new TVs here in EUROPE.
But I am interesting.
You can make that switch NTSC/PAL...

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