PAL Amiga 2000 Stuck In NTSC

gary · 19 May 2002, 07:17

I have a PAL Amiga 2000 (revision 4.1) which seems to be permanently stuck in NTSC mode. The screen frequency appears to be 50hz (PAL) but the bottom 56 lines of the display can not be used.

Using software to swap between 60/50hz does not do anything. I've searched for info about the motherboard jumpers but have had no luck. I seem to remember a way of forcing the ECS AGNUS chip (8372a) into PAL mode permanently by connecting pins but I can't find it.

The situation reminds me of what happened on my old KS1.2 Amiga500. Every now and then it would boot up with the lower 56 screen lines unusable - but a soft reboot would fix it.

I'd appreciate any help/advice on this problem!

Galahad/FLT · 20 May 2002, 20:59

Have you still got a system-configuration file in your DEVS directory. If you have, try renaming it so the system cannot find it and see if it alters, if you haven't got one, try copying it from a disk to see if it makes any difference.

03 September 2002, 10:47

I want to have this problem too.

What should I do?

Akira · 03 September 2002, 13:26

No,w you dont!

Seems like his machine got into an NTSC mode but it still is displaying at 50Hz.

Very strange!

EVERY screen has this problem? Even Workbench?

03 September 2002, 13:38

Hmm I see.

LUKas007 · 10 September 2002, 00:29

Well... it looks like it's the Amiga 2000 PAL version.
Look at: http://www.amiga-hardware.com/agnus.html

gary · 10 September 2002, 03:06

I found the solution a while ago. I had to cut a solder trace on the A2000 motherboard to allow it to boot in PAL mode.
From memory it was identified as a "test" solder pad and was located near the Agnus chip.

19 May 2002, 07:17	#1
gary Junior Member Join Date: Mar 2002 Location: Australia Age: 39 Posts: 268	PAL Amiga 2000 Stuck In NTSC I have a PAL Amiga 2000 (revision 4.1) which seems to be permanently stuck in NTSC mode. The screen frequency appears to be 50hz (PAL) but the bottom 56 lines of the display can not be used. Using software to swap between 60/50hz does not do anything. I've searched for info about the motherboard jumpers but have had no luck. I seem to remember a way of forcing the ECS AGNUS chip (8372a) into PAL mode permanently by connecting pins but I can't find it. The situation reminds me of what happened on my old KS1.2 Amiga500. Every now and then it would boot up with the lower 56 screen lines unusable - but a soft reboot would fix it. I'd appreciate any help/advice on this problem!

20 May 2002, 20:59	#2
Galahad/FLT Going nowhere Join Date: Oct 2001 Location: United Kingdom Age: 39 Posts: 5,035	system-configuration Have you still got a system-configuration file in your DEVS directory. If you have, try renaming it so the system cannot find it and see if it alters, if you haven't got one, try copying it from a disk to see if it makes any difference. __________________ Former member of: LSD, Scoopex, Razor 1911, Dual Crew Shining, Rednex, Fairlight. www.southwestscrap.co.uk

10 September 2002, 00:29	#6
LUKas007 Registered User Join Date: May 2002 Location: England Age: 34 Posts: 159	Well... it looks like it's the Amiga 2000 PAL version. Look at: http://www.amiga-hardware.com/agnus.html __________________ Peace!

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03 September 2002, 10:47	#3
oldpx Posts: n/a	I want to have this problem too. What should I do?

03 September 2002, 13:26	#4
Akira Registered User Join Date: May 2001 Location: # Posts: 12,593	No,w you dont! Seems like his machine got into an NTSC mode but it still is displaying at 50Hz. Very strange! EVERY screen has this problem? Even Workbench?

10 September 2002, 03:06	#7
gary Junior Member Join Date: Mar 2002 Location: Australia Age: 39 Posts: 268	I found the solution a while ago. I had to cut a solder trace on the A2000 motherboard to allow it to boot in PAL mode. From memory it was identified as a "test" solder pad and was located near the Agnus chip.

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