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In article <1993Jan25.231026.6514@news.unomaha.edu> fprince@cwis.unomaha.edu (Frank E. Prince) writes:
>Could anyone tell me the difference between .com and .exe files. The
>most I've come up with is that a com file is an "executable memory image"
>but that definition was somewhat out of context, and I don't really
>understand it. I've done some assembly language programming with MASM so
>I do understand instruction sets, stacks, registers etc. Any information
>regarding this is much appreciated.

	
	The following are some notable differences between .com and .exe
	files :

	.com : All the three segments namely CODE, DATA and STACK point to
	the same segment. In other words, the program can only occupy 64k
	memory. 

		A .com file has no header like that of a .exe file. Such a
		program is a exact copy of how the same program would look if 
		loaded into memory.

	.exe : Can have any no. of segments for CODE, DATA and STACK. 

		It has a header that stores the info about the address of the
		first executable instruction, relocation info. etc. 

		The following book gives a detailed description of the
		differences :

			IBM Assembler language  -> Peter Abel.

			Also , Advanced MSDOS  -> Ray Duncan (the best)

	regards,
	Pardha.

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