...DIFFERENCE BETWEEN .COM AND .EXE?

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Question by NOXITAILE
Submitted on 10/3/2003
Related FAQ: comp.os.msdos.programmer FAQ part 5/5
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WHAT IS THE DIFFERENCE BETWEEN .COM AND .EXE?

Answer by M S RAM
Submitted on 1/4/2004
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Following are the major differences b/w an EXE file and a COM file : 1.EXE file contains a header whereas a COM file does not. 2.EXE file may contain relocation items whereas a COM file can not. 3.The CODE,DATA and STACK segments of an EXE file may begin at different locations; that is an EXE program can contain more than one segment.But a COM has to contain only a single segment; thus the size of the COM file is limited to 64K.

Answer by Ravindranath
Submitted on 10/14/2004
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The very first two bytes of .exe file will be either MZ or ZM. DOS recognizes the command is either .exe or .com is by verifying this first two bytes

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