The COM and EXE executables had their memory requirements in a file header: EXE header and COM (MS-DOS) header. If the program requires < 64KB, use the flat space, if > 64KB, use segmented memory.
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The COM and EXE executables had their memory requirements in a file header: EXE header and COM (MS-DOS) header. If the program requires < 64KB, use the flat space, if > 64KB, use segmented memory.