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From: hull@hao.ucar.edu (Howard Hull)
Newsgroups: comp.sys.amiga.hardware
Subject: NTSC/PAL switch safe? One more time
Message-ID: <9063@ncar.ucar.edu>
Date: 3 Nov 90 04:34:54 GMT
Sender: news@ncar.ucar.edu
Reply-To: hull@hao.ucar.edu (Howard Hull)
Organization: High Altitude Observatory/NCAR, Boulder CO
Lines: 72

Ok, on the one hand I have this first article -

ref1:Message-ID: <615@medusa.informatik.uni-erlangen.de>
ref1:Date: 28 Nov 89 12:32:00 GMT
ref1:Organization: IMMD IV, University of Erlangen, W-Germany
ref1:
ref1:bobl@pro-graphics.cts.com (Bob Lindabury) writes:
ref1:
ref1:>toggle switch to jumper J102 and toggle between PAL and NTSC video (when
ref1:>powered off) and view the demo in it's full glory.  
ref1:
ref1:mlelstv@immd4.informatik.uni-erlangen.de (Michael van Elst) replies:
ref1:Switching between PAL and NTSC while still *POWERED ON* successfully
ref1:D A M A G E S  the chip.
ref1:
ref1:Just a warning.
ref1:
ref1:				Michael van Elst
ref1:
ref1:E-mail: UUCP: ...uunet!unido!fauern!immd4!mlelstv
ref1:

and on the other hand, I have this second article -

ref2:Message-ID: <1990Oct31.091918.9584@canterbury.ac.nz>
ref2:Date: 30 Oct 90 20:19:17 GMT
ref2:Organization: University of Canterbury
ref2:
ref2:thomas@DS.HUJI.AC.IL (Shimko Thomas) writes:
ref2:> I have built this switch that connects to a leg of Super Agnus via one
ref2:>of the
ref2:> jumpers. I would like to know if any damage can be made to my Amiga if
ref2:>I switch
ref2:> the Amiga from Pal to Ntsc or vice versa, without powering down. Of
ref2:>course the
ref2:> change takes place only at reboot. I just want to save my Amiga from any
ref2:> uneccesary powerdowns possible. Many thanx for proffesional views.
ref2:>Better reply
ref2:> by mail.
ref2:
ref2:chem194@canterbury.ac.nz (John Davis, programmer at large, chemisry department) replies:
ref2:A few people here have done that mod, and it seems to be perfectly ok
ref2:to toggle the switch and reboot, without powering down.
ref2:
ref2:Of course, you can always do the same thing via software - have a look
ref2:at BootMenu and Kill2090 on abcfd20 ( what! me push my own packages, you
ref2:bet :-)
ref2: 
ref2:-----------------------------------------------------------
ref2:| o  John Davis - CHEM194@canterbury.ac.nz               o |
ref2:| o  (Depart)mental Programmer,Chemistry Department      o |
ref2:| o  University of Canterbury, Christchurch, New Zealand o | 
ref2:| o                                                      o |
ref2:| o  co-sysop AmigaINFO BBS,1200/2400 baud CCITT,        o |
ref2:| o           24 hours a day, ph NZ +3-3371-531          o |
ref2:

Now then, are these two articles paid political announcements, or what?
With respect to the second article, I _know_ that the statement
"Of course, you can always do the same thing via software - have a look
at BootMenu and Kill2090 on abcfd20 ..."
needs a block of salt if the Amiga has 1 megabyte of chip ram and a CBM
A2620 card with 2 megabytes of 32-bit memory, since the software in question
must reset the protected soft ROM NTSC/PAL flag _after_ warm reboot rather
than before; thus do I wonder if what it says about the switch is all of the
time for some of the Amigas, or some of the time for all of the Amigas...
Are these two articles refering to the same mod (J102), or is there some
other mod, and if so, what is the one that won't fry the machine?  Does
anybody out there know for sure?  Where did the thread about frying the
machine come from, anyway?
						Howard Hull
						hull@ncar.ucar.edu