Screen goes white while accessing drive

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2 total messages Started by David Alan Gilbert Mon, 14 Dec 1992 14:17

#628

Author: David Alan Gilbert
Date: Mon, 14 Dec 1992 14:17

15 lines
861 bytes

Hi All, Does anyone have the same symptoms?

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?

Any suggestions - Dave

Screen goes white while accessing drive

#650

Author: 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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