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- Newsgroups: comp.sys.acorn.tech
- From: altman@cryton.demon.co.uk (Hugo Fiennes)
- Path: sparky!uunet!pipex!demon!cryton.demon.co.uk!altman
- Subject: Screen goes white while accessing drive
- Distribution: world
- 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>
- Sender: usenet@demon.co.uk
-
-
- 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
-
- -----------------------------------------------------------------------------
- "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
- -----------------------------------------------------------------------------
-