Re: .com and .exe files

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#1044

From: Michael Podanoffsky
Date: Wed, 27 Jan 1993 03:33

21 lines
1231 bytes

Both .com and .exe files can be loaded anywhere.

A .com file contains no segments whatsoever.  All data, code and stack share
the same 64k segment.

An .exe file contains segments and can exceed 64k.  Only .exe files are really
rommable should this ever be needed.  One major side effect is that different
code segments may be produced.

.com files are an exact byte image of the program in memory without any
relocation information.  That means all references are near.

.exe files contain a header and several segments.

------------------------

I should know: I wrote RxDOS an msdos replacement which is available in 
source code form: e-mail me if you need additional info.  

mikep@world.std.com

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Message-ID: <C1HtvM.Eun@world.std.com>

Path:

arc1-ca.pugleaf.net!sparky!uunet!das.wang.com!ulowell!news.bbn.com!usc!cs.utexas.edu!qt.cs.utexas.edu!yale.edu!ira.uka.de!sol.ctr.columbia.edu!eff!world!mikep

References: <1993Jan25.231026.6514@news.unomaha.edu> <1993Jan26.201921.21687@ousrvr.oulu.fi>

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Newsgroups: alt.msdos.programmer
Path: arc1-ca.pugleaf.net!sparky!uunet!das.wang.com!ulowell!news.bbn.com!usc!cs.utexas.edu!qt.cs.utexas.edu!yale.edu!ira.uka.de!sol.ctr.columbia.edu!eff!world!mikep
From: mikep@world.std.com (Michael Podanoffsky)
Subject: Re: .com and .exe files
Message-ID: <C1HtvM.Eun@world.std.com>
Organization: The World Public Access UNIX, Brookline, MA
References: <1993Jan25.231026.6514@news.unomaha.edu> <1993Jan26.201921.21687@ousrvr.oulu.fi>
Date: Wed, 27 Jan 1993 03:33:21 GMT
Lines: 22

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