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> DOS > MZ |
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revolution 02 Jun 2009, 23:14
.exe files are not .com files. .exe files always start with 'MZ', it is part of what makes it an .exe file. The OS gets the entry point address from the .exe header at the beginning of the file.
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02 Jun 2009, 23:14 |
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neville 03 Jun 2009, 04:34
and the initial execution address is found in the header at CS=byte 16h, IP=byte 14h. The EXE header format can be found at http://www.frontiernet.net/~fys/exehdr.htm
_________________ FAMOS - the first memory operating system |
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03 Jun 2009, 04:34 |
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GhostXoPCorp 03 Jun 2009, 04:42
thank just what i needed, thanks guys
_________________ Oh that divide overflow. Just jumps out of the bushes every time to scare the day lights out of me. |
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03 Jun 2009, 04:42 |
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DOS386 04 Jun 2009, 14:06
GhostXoPCorp wrote: file is and all that dtuff, but wheni compile Please try to make less bugs in your posts 
MZ EXE format was invented for DOS. Later OS/2, Win16, Win32 and Win64 set up their EXE formats on the top of MZ, they indeed skip the MZ stub. Quote: have to check the 3rd letter (past the jmp NO. |
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04 Jun 2009, 14:06 |
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avcaballero 04 Jun 2009, 15:48
missed place..
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04 Jun 2009, 15:48 |
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GhostXoPCorp 04 Jun 2009, 16:07
sorry, i have problems with stuff like that, at the time in my head "stuff"
was spelled right, but on the monitor, it wasnt, thanks though i will keep a better look at that dos386: yes, i do, with my dos i made my file formats have to do that, i just wanted to know how i could get it from this: (example not real opcode) zeros just fill in the spaces for where the code would go 000VTEP rest of code vtep is VolTroX Executable Program how can i get it like this VTEP000 rest of code _________________ Oh that divide overflow. Just jumps out of the bushes every time to scare the day lights out of me. |
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04 Jun 2009, 16:07 |
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HyperVista 05 Jun 2009, 20:18
As an historical side note on the origins of "MZ" in the PE Header, 'MZ' are the initials of the Microsoft developer who wrote the PE file format, Mark Zbikowski.
Wiki Link |
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05 Jun 2009, 20:18 |
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GhostXoPCorp 05 Jun 2009, 20:45
thanks i will read up on that
_________________ Oh that divide overflow. Just jumps out of the bushes every time to scare the day lights out of me. |
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05 Jun 2009, 20:45 |
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pal 05 Jun 2009, 21:58
HyperVista wrote:
Is that a verified fact? I swear that is just what people assume even though there is no citation behind it. There is a mixture of assumptions, some say it is the initials, some say it is meaningless. Last edited by pal on 16 Jul 2009, 15:32; edited 1 time in total |
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05 Jun 2009, 21:58 |
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baldr 16 Jul 2009, 14:41
pal,
This is excerpt from MS-DOS 3.30 sources (inc\exe.inc): Code: ; ; EXE file header ; EXE_file STRUC exe_signature DW ? ; must contain 4D5A (yay zibo!) exe_len_mod_512 DW ? ; low 9 bits of length exe_pages DW ? ; number of 512b pages in file exe_rle_count DW ? ; count of reloc entries |
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16 Jul 2009, 14:41 |
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