assembly ?

blackzone · 10-14-2004, 05:03 PM

I have absolutely no knowledge about assembly.

Have a window exe file I want to open in assembly and modify.
I know which address to modify because someone wrote a document about it.

Any ease to use program which would allow me to do it, without too much learning curve?

nasm only allow compiling?
ndiasm only for disassembly reading?

CroMagnon · 10-14-2004, 05:39 PM

You're not dealing with assembly at all, you want a hex editor. Assembly is the source code, which is turned into machine language. Assembly represents each machine language instruction in a human readable language, but all you want to do is change bytes. If you want a good hex editor for Windows, I recommend XVI - search google for it. Be sure to make a backup of the file before you edit it.

blackzone · 10-14-2004, 11:44 PM

what I actually want is a disassembler, not really a hex editor.
And be able to modify a few line of it.

There are some shareware on the web. windasm, hakmans' disassembler, but most of them place limit, like can read but can't save or can only open a limit size.

not sure if ndisasm and some other disassembler might able to do it?
but I hope for some ease to use software.

CroMagnon · 10-15-2004, 02:36 AM

Oh ok, if you really do want to edit ASM, then ndisasm would do what you want, but you would need to check into the PE header to find the offset the code starts, which would be a non-trivial amount of work.

There seem to be a few free programs here http://www.thefreecountry.com/progra...semblers.shtml, I doubt many of them would have arbitrary restrictions on them.