Re: [9fans] /sys/src/^(9 boot)^/pc/memory.c

[Charles Forsyth <forsyth@caldo.demon.co.uk>]

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i know it's needed on earlier thinkpads, at least, to allow pcmcia
cards to work.  i remember a frustrating attempt to get a modem card
going on the butterfly thinkpad that was resolved by a similar change
(once i'd finally noticed that a Linux pcmcia configuration file
handled the thinkpad specially and started its equivalent scan at
0xD0000, presumably because the thinkpad has got something else there).

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From: YAMANASHI Takeshi <uncover@beat.cc.titech.ac.jp>
To: 9fans@cse.psu.edu
Subject: Re: [9fans] /sys/src/^(9 boot)^/pc/memory.c
Date: Tue, 17 Sep 2002 13:19:15 0900
Message-ID: <200209170418.g8H4Ikv240064@mail-o.cc.titech.ac.jp>

Just allow me to describe my case...

> > 	p = KADDR(0xD0000); /*RSC: changed from 0xC0000 */
 :
> Sadly I don't remember why I changed that.
> It was a long time ago.  I think umbscan is just
> flawed at the moment

umbscan thought that the starting umb address is
0xCA000.  But reading the cis mapped at the
address ever returned 0xFF.  The change fixed the
cis reading problem and 3C562 started to work.

Thanks.
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