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From: Michael S.Zick <mszick@pflash.com>
To: Alan Modra <amodra@bigpond.net.au>
Cc: Matthew Wilcox <willy@debian.org>, parisc-linux@parisc-linux.org
Subject: Re: [parisc-linux] EISA support
Date: Wed, 10 Oct 2001 09:11:20 -0500	[thread overview]
Message-ID: <01101009112000.00829@Wolf-01> (raw)
In-Reply-To: <20011010203110.S1100@bubble.sa.bigpond.net.au>

On Wednesday 10 October 2001 06:01 am, Alan Modra wrote:
> >
> > Would it be reasonable to mask port numbers to 10 bits for ISA in the
> > inb/outb routines?
>
> No.  Some old ISA boards do decode the top bits, and actually use them.

Alan,

Correct - 
16-bit ISA cards NEARLY ALWAYS decode the top bits; but 8-bit
cards don't (can't, the wires aren't on that part of the socket).

My comment was based on the i386 branch, which does have such a
config option for the (very) rare installation that needs to support such
a board.

I was only wondering if this would be a REASONABLE place in the 
code to put it.

Mike

  reply	other threads:[~2001-10-10 14:13 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2001-10-10  6:24 [parisc-linux] EISA support Matthew Wilcox
2001-10-10  8:32 ` Michael S.Zick
2001-10-10 11:01   ` Alan Modra
2001-10-10 14:11     ` Michael S.Zick [this message]
2001-10-10 14:48   ` Matthew Wilcox
2001-10-10 15:38     ` Matthew Wilcox
2001-10-10 16:57       ` Michael S.Zick
2001-10-10 12:45 ` Richard Hirst
2001-10-10 14:28   ` Matthew Wilcox
2001-10-10 17:36     ` Grant Grundler
2001-10-11  1:40     ` Matthew Wilcox
2001-10-11  3:56       ` Grant Grundler
2001-10-11 11:23       ` Richard Hirst
2001-10-11 20:22         ` Matthew Wilcox
2001-10-11  8:15     ` Richard Hirst
2001-10-12  6:44 ` Matthew Wilcox
2001-10-12  8:47   ` Richard Hirst
2001-10-12  9:01     ` Richard Hirst
2001-10-16 19:17 ` Tom
2001-10-16 19:46   ` Jochen Friedrich
2001-10-16 20:00     ` Matthew Wilcox
2001-10-16 22:26       ` Jochen Friedrich
2001-10-16 22:32         ` Matthew Wilcox
2001-10-18 14:31 ` Tom
2001-10-18 15:08   ` Matthew Wilcox
  -- strict thread matches above, loose matches on Subject: below --
2001-10-10 11:37 Pedot, Wolfgang

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