Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!uwm.edu!wuarchive!udel!haven!umd5!brianf
From: brianf@umd5.umd.edu (Brian Farmer)
Newsgroups: comp.windows.ms
Subject: __ahincr
Keywords: 64k+ data in in-line assembly
Message-ID: <6887@umd5.umd.edu>
Date: 13 Jul 90 20:53:05 GMT
Distribution: usa
Organization: University of Maryland, College Park
Lines: 20


	Has anyone tried to use the predefined variable '__ahincr'.  We
have a program that works with bitmaps that are > 64k so it needs to
update the selector after passing the end of the segment but we can't
get __ahincr to work.  We are using MSC 6.0 with the 3.0 SDK.  The code
is written in C and in-line assembly.  The definitions we have used are

extern int __ahincr;   
extern int _ahincr;

The first definition gives an undefined external on linking.  The second
compiles and links correctly but on running has a value of zero.

The code the actually works with the segments is in-line code.


Thanks for any help you might be able to offer.

Brian Farmer
brianf@umd5.umd.edu