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Conference hydra::amiga_v1

Title:AMIGA NOTES
Notice:Join us in the *NEW* conference - HYDRA::AMIGA_V2
Moderator:HYDRA::MOORE
Created:Sat Apr 26 1986
Last Modified:Wed Feb 05 1992
Last Successful Update:Fri Jun 06 1997
Number of topics:5378
Total number of notes:38326

2841.0. "NTSC screen on PAL Amiga" by JGO::CHAPMAN () Fri Aug 18 1989 11:44

Can anybody tell me why, about one time in 30, when I boot from a cold 
start, my machine comes up with an NTSC workbench screen instead of a PAL 
screen, ie. all looks normal but windows can't be opened in the bottom 20% 
of the screen. Otherwise everything works and a re-boot cures it.

Just curious, since I have been living with it OK for a long time.

Regards

Colin
T.RTitleUserPersonal
Name		DateLines
2841.1It's a bug...FRAMBO::BALZERChristian Balzer DTN:785-1029Fri Aug 18 1989 11:5711
    That's a bug in the ROM (1.2, 1.3) that will be fixed in 1.4.
    Since this bug is timing/speed problem, it goes away if you use
    a 68020 card like the A2620 (expensive solution ;-). 
    On the other hand there is very small utility posted on UseNet a
    while ago that will reset your PAL Amiga if it booted up in NTSC
    mode. I'll make that beast available on monday and give you the
    location is this topic.
    
    Regards,
    
    <CB>
2841.2It's in here...FRAMBO::BALZERChristian Balzer DTN:785-1029Tue Aug 22 1989 07:527
    Re: *
    
    Reset.zoo is available at FRAMBO::BZOEVFL:[BALZER.AMIGA]
    
    Have fun,
    
    <CB>
2841.3in the states tooWJG::GUINEAUOpening the doors of PerceptionTue Aug 22 1989 09:015
It's here in the US on WJG::AMIGA: now too.

BTW - Any chance of running PAL on an NTSC machine? I'd love a few extra
lines :-)
2841.4But who'll need it there? ;-)FRAMBO::BALZERChristian Balzer DTN:785-1029Tue Aug 22 1989 09:1813
    Re: .3
    
    Well, if you have a "Super Agnus" (1MB) John, yes. You'll also need
    a monitor capable of displaying a PAL signal. Multisync should do
    fine. There's one jumper pad on the motherboard you'll have to change,
    but I currently don't recall which. It's the TEST pin of the Agnus
    that gets switched.
    Under 1.4 (still faaaaar away) you'll be able to switch display
    modes under software control...
    
    Regards,
    
    <CB>
2841.5WJG::GUINEAUOpening the doors of PerceptionTue Aug 22 1989 11:4410
>    Under 1.4 (still faaaaar away) you'll be able to switch display
>    modes under software control...

Well, since I'm waiting for 1.4 to get ECS and a Multi-Sync, guess I'll have 
it then.

What's the PAL resolutions for ECS?

John
2841.6No difference...FRAMBO::BALZERChristian Balzer DTN:785-1029Wed Aug 23 1989 03:5917
    Re: .5
    
    Uh, the same as today... ;-)
    Not enough info? Oh well...
    
    PAL display resolutions:
    Standard 320/640 by 256/512, plus respective overscan, 
    i.e. 704 by 560.
    Please note that the non-interlaced display rate is 50Hz, so interlaced
    at 25Hz looks more yuckie than NTSC stuff at 30Hz.
    
    As far as (not yet finally defined!) new display modes with ECS
    are concerned, they'll be the same, too.
    
    Regards,
    
    <CB>