Why Demos run in perfect resolution in WinUAE but not on real NTSC Amigas?

c0dehunter · 20 July 2016, 06:43

All of my Amiga systems, A500, A1200, A200HD are north American NTSC versiona. When I copy a demo disk onto a real floppy, they usually are missing the bottom portion when displayed on real Amiga and RGB monitor.

example the RSI Follow Me (Megadeth's Mascot, the coolest demo!)

It is because most demos are in PAL format?

Is there a fix for it?

Thanks for your help.

thgill · 20 July 2016, 06:57

Generally speaking ALL demos are in PAL 50hz. Some give a 60hz option, but they are few and far between. This isn't surprising considering like 99% of them are coded by Europeans.

You can try holding down both mouse buttons when you power your Amiga on and press any key to switch from 60 to 50hz. Then click Boot. This is the early boot screen.

This doesn't work for all software in my experience but a good place to start.

c0dehunter · 20 July 2016, 07:04

Quote:

You can try holding down both mouse buttons when you power your Amiga on and press any key to switch from 60 to 50hz. Then click Boot. This is the early boot screen.

I tried this on my A500, but I don't see and option to "click boot".

alexh · 20 July 2016, 07:11

Only works on KS2.04 or higher I think

c0dehunter · 20 July 2016, 07:15

Quote:

Originally Posted by alexh

Only works on KS2.04 or higher I think

Then it defeats the purpose for running most demos (for me, personally), as I have mostly *zero* luck running demos (the late 80's, early 90's scrolling ones, not the AGA ones) on KS 2.0 and above.

demolition · 20 July 2016, 11:59

Some might work with ReloKick (if you have the extra memory for the KS). It makes it possible to switch between PAL and NTSC if you have an ECS machine. It also requires your monitor to handle PAL as well though. I'd try ReloKick 1.4 on your 1200. Some very old demos that depend on ranger memory will not work, but it should be few.

mark_k · 20 July 2016, 17:54

Assuming your A500 has an ECS Agnus chip (many/most do), use a program like Degrader to reboot in PAL mode before booting a game/demo disk.

For disks which boot using the startup-sequence, you could modify them by adding a program to switch to PAL mode at the beginning. Check out NTSC-PAL on Fish disk 387.

idrougge · 21 July 2016, 03:17

Quote:

Originally Posted by thgill

You can try holding down both mouse buttons when you power your Amiga on and press any key to switch from 60 to 50hz. Then click Boot. This is the early boot screen.

That is not enough. You must also tell the machine to boot in PAL mode. Pressing a key only switches the early startup menu itself.

Amiga1992 · 21 July 2016, 14:05

Quote:

Originally Posted by c0dehunter

Then it defeats the purpose for running most demos (for me, personally), as I have mostly *zero* luck running demos (the late 80's, early 90's scrolling ones, not the AGA ones) on KS 2.0 and above.

They are all meant to be run on european computers.mget an euro machine or upgrade it so you can switch to PAL.

idrougge · 22 July 2016, 02:54

Depending on your Agnus chip, adding a switch to do that might be easy on the A2000 and A500.

Retro1234 · 22 July 2016, 16:26

What results do you get in WinUae with NTSC enabled? do they go off screen.

c0dehunter · 23 July 2016, 19:50

Quote:

or upgrade it so you can switch to PAL

how?

Hewitson · 30 July 2016, 04:44

Quote:

Originally Posted by c0dehunter

Then it defeats the purpose for running most demos (for me, personally), as I have mostly *zero* luck running demos (the late 80's, early 90's scrolling ones, not the AGA ones) on KS 2.0 and above.

In my experience KS 2/3 cause very few problems with running old demos/intros. Anything other than a 68000/010 is usually the problem.

AC/DC HACKER! · 03 December 2017, 00:30

Quote:

Originally Posted by c0dehunter

how?

Have you downloaded Degrader? I use that often for many games and some demos. Run Degrader and use the 2 50 Hertz selections. Then insert the floppy, and click RunBootBlock. If caches are a challenge, then also use NoCache before clicking RunBootBlock.

T.U.D.E. (TUDE) is another brilliant degrader or way to Boot some floppies.

These are usable and doable if you also have a Picasso 4 or some other type of ScanDoubler. Use a floppy if needed to get it all going. Require more help?

Amiga1992 · 04 December 2017, 16:11

Quote:

Originally Posted by c0dehunter

how?

I have a Fat Agnus in my NTSC A500 and I installed a PAL/NTSC switch to it. I suggest you do the same.
The info is everywhere online:
http://eab.abime.net/showthread.php?t=68605
http://www.amibay.com/showthread.php...TSC-PAL-switch
And here's the thread I made here when I made my mod:
http://eab.abime.net/showthread.php?t=87174

TUDE or Degrader sometimes don't work. Since fitting this switch is so easy, I would do this instead.

20 July 2016, 06:43	#1
c0dehunter Registered User Join Date: Apr 2011 Location: USA Posts: 399	Why Demos run in perfect resolution in WinUAE but not on real NTSC Amigas? All of my Amiga systems, A500, A1200, A200HD are north American NTSC versiona. When I copy a demo disk onto a real floppy, they usually are missing the bottom portion when displayed on real Amiga and RGB monitor. example the RSI Follow Me (Megadeth's Mascot, the coolest demo!) It is because most demos are in PAL format? Is there a fix for it? Thanks for your help.

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20 July 2016, 06:57	#2
thgill Registered User Join Date: May 2008 Location: Mason, Ohio / USA Age: 48 Posts: 391	Generally speaking ALL demos are in PAL 50hz. Some give a 60hz option, but they are few and far between. This isn't surprising considering like 99% of them are coded by Europeans. You can try holding down both mouse buttons when you power your Amiga on and press any key to switch from 60 to 50hz. Then click Boot. This is the early boot screen. This doesn't work for all software in my experience but a good place to start.

20 July 2016, 07:11	#4
alexh Thalion Webshrine Join Date: Jan 2004 Location: Oxford Posts: 14,337	Only works on KS2.04 or higher I think

20 July 2016, 11:59	#6
demolition Unregistered User Join Date: Sep 2012 Location: Copenhagen / DK Age: 43 Posts: 4,190	Some might work with ReloKick (if you have the extra memory for the KS). It makes it possible to switch between PAL and NTSC if you have an ECS machine. It also requires your monitor to handle PAL as well though. I'd try ReloKick 1.4 on your 1200. Some very old demos that depend on ranger memory will not work, but it should be few.

20 July 2016, 17:54	#7
mark_k Registered User Join Date: Aug 2004 Location: Posts: 3,335	Assuming your A500 has an ECS Agnus chip (many/most do), use a program like Degrader to reboot in PAL mode before booting a game/demo disk. For disks which boot using the startup-sequence, you could modify them by adding a program to switch to PAL mode at the beginning. Check out NTSC-PAL on Fish disk 387.

22 July 2016, 02:54	#10
idrougge Registered User Join Date: Sep 2007 Location: Stockholm Posts: 4,332	Depending on your Agnus chip, adding a switch to do that might be easy on the A2000 and A500.

22 July 2016, 16:26	#11
Retro1234 Phone Homer Join Date: Jun 2006 Location: 5150 Posts: 5,773	What results do you get in WinUae with NTSC enabled? do they go off screen.

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