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From: pingel@wang7.UUCP
Newsgroups: comp.os.minix
Subject: Re: Hardware Dependance
Message-ID: <1034@wang7.UUCP>
Date: Sat, 21-Feb-87 14:14:44 EST
Article-I.D.: wang7.1034
Posted: Sat Feb 21 14:14:44 1987
Date-Received: Mon, 23-Feb-87 18:47:04 EST
References: <275@ihnp3.UUCP> <459@moncol.UUCP> <2529@well.UUCP> <228@inuxf.UUCP> <127@tg.UUCP>
Organization: Wang Laboratories, Lowell, MA, USA
Lines: 13
Summary: IBM PC rom code uses fixed static variables in low memory.


Please note that rom code uses static variables in low core.  See 40:42 for
7 bytes of floppy controller status.  This is referanced on line 134, and
lines 2903 - 2961 of rom listing in IBM Technical Referance manual.
Furthermore, there is no locking around this code via interrupt disables.

This is just one example.

-- 
Lee Pingel, M/S 014790			  harvard!vaxine!ima--+
Wang Laboratories Inc.			decvax!wanginst!wang--+---wang7!pingel
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