Subject: Re: DEC hardware question
To: None <firstname.lastname@example.org>
From: Michael L. Hitch <email@example.com>
Date: 07/19/2002 13:19:04
On Fri, 19 Jul 2002, Clemmitt Sigler wrote:
> On Fri, 19 Jul 2002, Jochen Kunz wrote:
> > Wasn't / is there a problem with the PMAD-A TC Ethernet card? It works
> > on PMAX but not in a TC Alpha?
> As of the latest testing I've done, this is still correct. PMAD-AA
> TurboChannel Ethernet cards won't work in Alpha 3000 TC bus machines.
> It is reported to work fine on PMAX.
Thanks to a kind person, I now have a PMAD-AA card in a 300/700 and have
verified the problem still exists in 1.6_BETA4. I am planning on trying
to track down this problem.
> I'm not much of a kernel hacker but am still willing to work with
> someone who's interested in looking at this problem. I have the
> necessary hardware, and even have some spare equipment I'm willing
> to give someone who can help fix this.
> My only guess is that the code for the built-in PMAD-BA interface
> (IOCTL ASIC, file syssrc/sys/dev/tc/if_le_ioasic.c) and the
> TC PMAD-AA (TC bus, file syssrc/sys/dev/tc/if_le_tc.c) is quite
> different, and the TC initialization isn't quite right. This is
> just a guess.
The problem seems to occurring in le_dec_writereg(), which has the
* Write a lance register port, reading it back to ensure success. This seems
* to be necessary during initialization, since the chip appears to be a bit
* pokey sometimes.
It's failing to read back the data it's trying to write. I need to try
to remember where I've got my documentation for the DEC 3000 and the
Michael L. Hitch firstname.lastname@example.org
Information Technology Center
Montana State University Bozeman, MT USA