[111] in linux-scsi channel archive
Re: Edge triggered NCR810 SCSI interupts (fwd)
daemon@ATHENA.MIT.EDU (Stephen S M Wong)
Wed Mar 22 18:43:36 1995
From: smwong@cs.cuhk.hk (Stephen S M Wong)
To: archie@CS.Berkeley.EDU (Archie Cobbs)
Date: Wed, 22 Mar 1995 19:58:56 +0800 (HKT)
Cc: linux-scsi@vger.rutgers.edu
In-Reply-To: <199503210149.RAA27105@tuba.CS.Berkeley.EDU> from "Archie Cobbs" at Mar 20, 95 05:48:55 pm
> > On my machine, the boot messages of the NCR810 SCSI driver contain the
> > disturbing line:
> >
> > Mar 6 22:51:51 cortex kernel: scsi0 : using edge triggered interrupts.
> >
> > However, on my board (ASUS PCI/I-486SP3G), the NCR SCSI chip is
> > connected to a level triggered interrupt line and anything else
> > (i.e. edge triggered) would not conform to the PCI specification.
I've similar message from kernel boot:
scsi0 : using edge triggered interrupts.
However, just a bit more information. The linux kernel changes from
saying that the system is using 'level trigger interrupt' to 'edge
trigger interrupt' when I updated my system BIOS (+ NCR SDMS BIOS) from
awsg0301 to awsg0302. I have a similar config system which still uses
the old BIOS, and it consistently reports that it's level triggered.
Therefore, it's the BIOS change that make the above misleading message,
don't know the exact reason, maybe a 'new' bug in newer BIOS?
I'm using ASUS SP3G/Intel DX2-66/16MB RAM/linux 1.2.1 etc.
That's my 2 cents.
--
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Stephen Siu Ming Wong Internet: stephenwong@cuhk.hk [ O O ]
Dept of Computer Science smwong@cs.cuhk.hk \_-_/
Chinese University of _| |_
Hong Kong / \_/ \
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