Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sun-barr!apple!agate!shelby!rutgers!cbmvax!cbmehq!cbmger!peterk
From: peterk@cbmger.UUCP (Peter Kittel GERMANY)
Newsgroups: comp.sys.amiga
Subject: Re: Blowing up your 1950
Message-ID: <602@cbmger.UUCP>
Date: 30 Nov 90 09:16:39 GMT
References: <964.2754A82B@weyr.FIDONET.ORG>
Reply-To: peterk@cbmger.UUCP (Peter Kittel GERMANY)
Organization: Commodore Bueromaschinen GmbH, West Germany
Lines: 35

In article <964.2754A82B@weyr.FIDONET.ORG> David.Plummer@f70.n140.z1.FIDONET.ORG (David Plummer) writes:
>  Try this on a SP9000
>(SuperPet for all you neophites out there):
  ^^^^^^^^ (a normal CBM 8032 would already do) 
>for a=1 to 100:for b=1 to 255:poke 59521,b:next b,a
> 
>(I think it's 59521, it's been about 4 years).  It shifts the video
>so badly that you get a BACKWARDS display reflected off the inside of
>your display tube, and the letters are about 4 times as big because
>they have to travel faster.  It also makes sounds that I was worried
>could cause sterility.  I'm sure it can't be good for it.

I had a similar effect with a software running harakiri. Afterwards
the monitor image was only half height/half width for five minutes
before it slowly recovered. Didn't feel like healthy for the monitor.
 
>Point being, nothing can instantly destroy your monitor.  Even if you
>could damage it, I don't think anything could be so severe as to do
>damage before you could turn it off.

I doubt that strongly. There are enough stories about blowing up even
a Multisync with a properly set up Amiga, because that monitor wants
to resynchronize every frame and switches an internal relay at that
speed. Or think about those stories about Atari STs connected to the
wrong monitor type or using the wrong resolution.

In general, monitors are very vulnerable. With their high-voltage
parts and their horizontal deflection circuitry that must be tuned
to the correct frequency, they are sensible for changes in that
frequency. That may put them into totally unspecified states where
everything may happen. One should be carefull.

-- 
Best regards, Dr. Peter Kittel  // E-Mail to  \\  Only my personal opinions... 
Commodore Frankfurt, Germany  \X/ {uunet|pyramid|rutgers}!cbmvax!cbmger!peterk