From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from vopserver.pflashcom (mail.pflash.com [207.19.136.5]) by dsl2.external.hp.com (Postfix) with ESMTP id 05BD64846 for ; Wed, 10 Oct 2001 08:13:05 -0600 (MDT) Content-Type: text/plain; charset="iso-8859-1" From: Michael S.Zick To: Alan Modra Subject: Re: [parisc-linux] EISA support Date: Wed, 10 Oct 2001 09:11:20 -0500 Cc: Matthew Wilcox , parisc-linux@parisc-linux.org References: <20011010072441.B24923@parcelfarce.linux.theplanet.co.uk> <01101003320900.00964@Wolf-01> <20011010203110.S1100@bubble.sa.bigpond.net.au> In-Reply-To: <20011010203110.S1100@bubble.sa.bigpond.net.au> MIME-Version: 1.0 Message-Id: <01101009112000.00829@Wolf-01> List-ID: 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