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From: drew@geac.UUCP (Drew Sullivan)
Newsgroups: comp.lang.c
Subject: Re: Passing (char *) NULL to printf to match %s
Message-ID: <1166@geac.UUCP>
Date: Tue, 18-Aug-87 04:52:05 EDT
Article-I.D.: geac.1166
Posted: Tue Aug 18 04:52:05 1987
Date-Received: Wed, 19-Aug-87 05:23:23 EDT
References: <166@qetzal.UUCP> <157@hobbes.UUCP> <875@bsu-cs.UUCP> <1219@cognos.UUCP> <25173@sun.uucp> <298@apex.UUCP>
Reply-To: drew@geac.UUCP (Drew Sullivan)
Organization: Systems Software
Lines: 19


If the person is writting mixed C and assembler, then this can happen
very easily.  
	I in my initial mis-understanding of what was going on
wrote:
_data	segment word public 'DATA'
_data	ends
	assume	ds:_data
rather than
_data segment word public 'DATA'
_data ends
dgroup	group _data
	assume	ds:dgroup

The first caused my assembler data to be offset relative to these extra
8 bytes and hence had all of my offset incorrect.

That coupled with being a TSR (Dos Pop-up) routine made it very hard
to debug.  (Oh for the want of a real OS)