This is a message from a linux mailing list I'm on. The author has
apparently improved the scsi perfomance of machines using the NCR5380. I
don't know enough about the kernel yet to try and add/port this code, but I
thought somenone else might have the time/experience to try.
-----Original Message-----
From: Ove Edlund <ove.edlund@sm.luth.se>
To: linux-mac68k@mac.linux-m68k.org <linux-mac68k@mac.linux-m68k.org>
Date: Friday, June 30, 2000 7:55 PM
Subject: Test-kernel for faster SCSI on NCR5380 macs


>Hi!
>
>I have had Linux installed on my IIci for some time. It works great in many
>ways. One thing that is quite annoying though is the slow disk performance.
>I have now tried to do something about it. The scary thing is that I
>basicly don't know what I am doing, but it seems to work. (Well, I
>understand SOMETHING of what I do, but too little to feel quite
>comfortable.)
>
>I would appreciate if some brave soul, other than me, would dare to test
>the new driver. The changes work for me, other than that I make no
>promises.
>
>The reason for the speedup is that pseudo-DMA is used. I implemented it by
>investigaing MacOS with MacsBug and looking at existent implementations of
>pseudo-DMA that use the generic NCR5380 code. Also the initial pseudo-DMA
>code that was already in the mac-driver was a good help.
>
>These are the files:
>
>    ftp://sm-emac19.sm.luth.se/pub/vmlinux-5380-pDMA.gz
>    ftp://sm-emac19.sm.luth.se/pub/mac_scsi.c
>    ftp://sm-emac19.sm.luth.se/pub/mac-5380-pDMA.patch
>
>Best wishes
>
>Ove Edlund
>
>
>P.S.
>I will be gone for almost two weeks from now, but then I will be reachable.
>
>
>
>--
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