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Article #650

Screen goes white while accessing drive

#650
From: Hugo Fiennes
Date: Tue, 15 Dec 1992 23:55
28 lines
1789 bytes
In article <gilbertd.724342653@cs.man.ac.uk> gilbertd@cs.man.ac.uk writes:

>I've got Risc OS 3.1, ARM 3 (Leading edge) Morley
>uncached SCSI card.  When I copy a lot of stuff
>from floppy to hard drive in say mode 16 occasionaly
>the screen goes white for a second or two - while
>accessing the hard drive.  I didnt think this
>should happen with an ARM 3 and I definitly
>thought it shouldnt happen on hard drives.
>
>Morley says it is Risc OS which does it - but I thought
>this only happened if you ran out of bandwidth or something
>similar?
Speak to Morley again - Gary Partis there tells me he's tweaked the code
so that it runs in the foreground (ie, not on IRQs anymore - which happened
every 8 bytes on the uncached card - 800kb/sec = 100k IRQ's sec = help,
I have to dump video DMA). This also helps with marginal serial problems
(sometimes) and Acorn Replay. (If background xfers are requested it will
enable them for that operation).

Hugo

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                                     "Did I say that? My lips didn't move..."
Hugo Fiennes - The Serial Port                      altman@cryton.demon.co.uk
                                                or altman@cix.compulink.co.uk
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References: <gilbertd.724342653@cs.man.ac.uk>

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Newsgroups: comp.sys.acorn.tech
From: altman@cryton.demon.co.uk (Hugo Fiennes)
Path: arc1-ca.pugleaf.net!sparky!uunet!pipex!demon!cryton.demon.co.uk!altman
Subject: Screen goes white while accessing drive 
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References: <gilbertd.724342653@cs.man.ac.uk>
Organization: The Serial Port
Lines: 28
Date: Tue, 15 Dec 1992 23:55:02 +0000
Message-ID: <724479993snx@cryton.demon.co.uk>
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