Date: Sat, 24 Apr 1999 23:23:49 -0700 (PDT) From: Matthew Dillon <dillon@apollo.backplane.com> To: Doug Rabson <dfr@nlsystems.com> Cc: KATO Takenori <kato@ganko.eps.nagoya-u.ac.jp>, peter@netplex.com.au, current@FreeBSD.ORG Subject: Re: singed short to unsigned long conversion problem in isa.c Message-ID: <199904250623.XAA33729@apollo.backplane.com> References: <Pine.BSF.4.05.9904241900410.28665-100000@herring.nlsystems.com>
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:> The assumption that an I/O port address is lower than 0x8000 is OK for
:> IBM-PC's ISA-bus, but PC98 can use hiher addresses for ISA-bus like
:> bus.
:
:I understand. I think the best thing is to store the port address as an
:int. I don't think there is a need to fork the file into a pc98 version.
:
:--
:Doug Rabson Mail: dfr@nlsystems.com
:Nonlinear Systems Ltd. Phone: +44 181 442 9037
I would recommend making it an unsigned short, and representing the
-1 case with a '#define BAD_PORT ((unsigned short)-1)'. All
representations and tests for this special case would be required to use
the #define rather then a constant.
-Matt
Matthew Dillon
<dillon@backplane.com>
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