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Re: DECStation: Support for PMAZ-AA TC SCSI card?

To: "Maciej W. Rozycki" <macro@ds2.pg.gda.pl>
Subject: Re: DECStation: Support for PMAZ-AA TC SCSI card?
From: "Houten K.H.C. van (Karel)" <karel@kpn.com>
Date: Wed, 17 Jul 2002 14:16:45 +0200
Cc: "Houten K.H.C. van (Karel)" <vhouten@kpn.com>, linux-mips@oss.sgi.com
In-reply-to: Your message of "Wed, 17 Jul 2002 11:05:24 +0200." <Pine.GSO.3.96.1020717105027.13355F-100000@delta.ds2.pg.gda.pl>
Reply-to: vhouten@kpn.com
Sender: owner-linux-mips@oss.sgi.com
Hi Maciej,


> > KN05 V2.1k
> > >>cnfg
> >  3: KN05     DEC      V2.1k    TCF0  (256 MB)
> >                                      (enet: 08-00-2b-37-63-76)
> >                                      (SCSI = 7)
> >  1: PMAZ-AA  DEC      V5.3d    TCF0  (SCSI = 7)
> 
>  Well, you have a mixed system, so it's quite possible PMAZ-A support does
> not work reliably anywhere.  I don't have such a card, but specs are
> available and the support code is about one screen long.  So it should be
> fairly trivial to verify -- I'll look at it. 
What do you mean by a mixed system?
 
>  Also you have a KN05 system, which doesn't help, unfortunately.  The KN05
> module implements aggressive posting of uncached (read: iomem) writes (see
> also /proc/interrupts on your system) and synchronization primitives are
> non-existent.  Since for half a year there is no agreement on how generic
> synchronization should look like for MIPS, I'm more and more tempted to
> add a local hack which at least will let DECstations to perform reliably.
> It's quite possible the lack of synchronization is the lone reason of your
> problems. 

Well, if there is anything I could do to help you by testing things,
I'm eager to do so. 

I also have a 5000/200 system. Would it be interesting to put the
PMAZ-AA into that system, and see how it behaves?

Regards,
Karel.


-- 
Karel van Houten

----------------------------------------------------------
The box said "Requires Windows 95 or better."
I can't understand why it won't work on my Linux computer. 
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