EXE file header

               Length
    Offset     (bytes)  Description
    ────────────────────────────────────────────────────────────────────────

    00h        1        EXE file signature - always 4Dh 5Ah (MZ)
    02h        2        Length of image remainder (modulus 512)
    04h        2        Length of image in pages (div 512)
    06h        2        Number of relocation table items
    08h        2        Header size in paragraps (used to locate beginning
                        of the load module in the file)
    0Ah        2        Minimum number of paragraphs required above the
                        loaded program
    0Ch        2        Maximum number of paragraphs required above the
                        loaded program
    0Eh        2        Offset of stack segment in load file
    10h        2        Stack offset (initial SP)
    12h        2        File check sum - negative sum of all the words in
                        the file, ignoring overflow
    14h        4        Initial CS:IP (offset from PSP)
    18h        2        Offset of relocation table within file
    1Ah        2        Overlay number (0 for resident part)