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Old 24 May 2019, 19:33   #1
hellacat
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Lightbulb Amiga 2000-b pal/ntsc switching help

Hi! Ive got an NTSC Amiga 2000 rev 4.2 with 2.04 ROMs and an agnus 8372 and I wanted to know what I need to switch between pal and ntsc.
I think from what I've heard I need 3.1 ROMs and a fatter agnus (ECS) and I'm all good but do I need the full ECS chipset? (Super Denise too?) And if I got a fat agnus do I for sure need 3.1 roms? Or can I switch fine with 2.04.
Some places say you can swap a jumper if you have a certan ocs agnus too I think.
What I'm looking for is the cheapest and easiest way to swap between pal and ntsc without janking it
Thanks!
Edit: ive actually found out that the 8372 is a fatter agnus! Do I just need ROMs now?

Last edited by hellacat; 24 May 2019 at 20:51. Reason: Add agnus number
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Old 25 May 2019, 20:06   #2
Jope
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You just need a piece of software to change the screen mode. What are you planning on doing?

Degrader or tude might be useful?
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Old 27 May 2019, 01:29   #3
Marchie
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No, you don't need a super denise.

Jumper J102 will boot into PAL or NTSC with an 8372A Agnus (most other Agnus versions are dedicated PAL or NTSC).

3.1 ROMs allow you to hold down both mouse buttons on boot and choose PAL or NTSC (regardless of how you set J102). This will make the machine display a PAL resolution (and frame rate I think?) but won't change the timing of your actual machine. I don't know how this affects games, but if you're trying to genlock for example, you will need to change the crystal as well.

Last edited by Marchie; 27 May 2019 at 01:41.
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Old 27 May 2019, 01:43   #4
TjLaZer
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There are command programs to change modes. A command for the c: folder called NTSC and PAL.
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Old 29 May 2019, 17:12   #5
hellacat
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Quote:
Originally Posted by Marchie View Post
No, you don't need a super denise.

Jumper J102 will boot into PAL or NTSC with an 8372A Agnus (most other Agnus versions are dedicated PAL or NTSC).

3.1 ROMs allow you to hold down both mouse buttons on boot and choose PAL or NTSC (regardless of how you set J102). This will make the machine display a PAL
resolution (and frame rate I think?) but won't change the timing of your actual machine. I don't know how this affects games, but if you're trying to genlock for example, you will need to change the crystal as well.
Ok nice! Thanks!
Ive also got an a 2320 scandoubler. Do you know if it would be fine with mode switching?
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Old 30 May 2019, 02:27   #6
Marchie
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I have an indie ECS and it copes fine with NTSC or PAL, hopefully the 2320 is the same.
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Old 30 May 2019, 08:06   #7
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The 2320 supports PAL and NTSC just fine. Many VGA monitors will refuse to sync to 50Hz though.
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Old 30 May 2019, 11:07   #8
Matt020
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How should J102 be jumped for PAL and NTSC?
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