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From: caldwell_m@darwin.ntu.edu.au
Newsgroups: comp.sys.amiga.hardware
Subject: Re: A2320 problem: A GREY VERTCAL BAR
Message-ID: <1991Jan23.101431.529@darwin.ntu.edu.au>
Date: 23 Jan 91 00:44:31 GMT
References: <1991Jan20.175904.4585@cc.helsinki.fi>
Lines: 48

In article <1991Jan20.175904.4585@cc.helsinki.fi>, ronkko@cc.helsinki.fi writes:
> After I installed my A2320 deinterlacer, I have seen a few 
> times a very strange 'phenomenon' on my screen. There appears 
> suddenly A GREY VERTICAL BAR, which appends from the top of 
> the screen to the bottom. It's appearance does not correlate 
> with any particular program, but it seems to disappear at 
> least when I open Dpaint III (v.3.14) in Hires mode. It also 
> disappears if I reboot my machine (warm or cold).

..
 
> The hardware I currenttly have is: B2000 (PAL, rev 6.2), A2620 
> (4 MB), GVP SCSI II (0/8 MB), NEC Multisync 3D (I have tested 
> my A2320 with EIZO Flexscan 9060S, too, and the bar also then 
> appeared a couple of times) and the A2320, of course. I have 
> KS 34.5 and WB 34.28 in my Amiga, and I use overscanned 
> (730x284) WorkBench screen.

Your problem sounds like a well knowen hardware problem with all amigas.
(I get it on my A500)
What you are seeing is probably a sprite.  The problem comes when the 
screen is adjusted far to the left, as does happen when you use an overscan
screen.  The problem is caused by the hardware not having enough time to 
reset the sprites.  Next time you see it try using preferences to move the 
screen over to the left slowly and see if the line goes away.

Other than having a smaller screen I don`t know of any fix.  If you use a 
program that uses all the sprites it might fix it.
 
> So, I would like to know what is causing this 'bar'! Has anyone 
> else noticed this kind of problem? I hope at least C= engineers 
> have something to say about this matter...
> 
> 
> (I can also send a 'reconstructed' IFF picture, if you C= people 
> tell me how to pack it and where to send it)
>  
> 
> ---------------------------------------------------------------------------
>   Reijo Ronkko     University of Helsinki, Dept. of General Microbiology,
>                    Mannerheimintie 172, 00300 Helsinki, FINLAND
>                    Fax +358-0-4735426

Malcolm Caldwell     CALDWELL_M@DARWIN.NTU.EDU.AU
Computer Science
Northern Territory
University
Darwin Australia