Subject: Re: ncr53c810 driver
To: Nathan J. Williams <nathanw@MIT.EDU>
From: Manuel Bouyer <>
List: port-alpha
Date: 06/10/2000 17:39:47
On Fri, Jun 09, 2000 at 07:24:33PM -0400, Nathan J. Williams wrote:
> <> (Eric.Melville (Exchange)) writes:
> > According to the NetBSD/alpha notes, the driver for the ncr53c810 SCSI
> > chipset is buggy. Is this still the case with NetBSD-1.4.2 and
> > NetBSD-current?
> The "ncr" driver for the 53c810 chipset is buggy. It's annoyingly
> buggy, but not disasterously so; lots of people do use it
> successfully. My AlphaStation 200 uses the ncr driver and doesn't trip
> over any of the bugs.
> There's a newer "siop" driver for the 53c810 and others in that family
> which seems to be less buggy (it's certainly better-written), but
> hasn't been exposed to the test of time, and is missing a few
> performance-critical features.

What features ? siop is only missing tagged queuing now.
Also on my DS20, ncr didn't enable the clock doubler, so I had only 20MB/s
bandwidth instead of 40 on my 875.

Manuel Bouyer <>