how to compare 2 .exe line by line?

Originally Posted by zEr0

hmmm compare two files on assembly level - sounds good

but i prefer the old way

FC /B [file1] [file2] > [log_file]

and then trace this log and in IDA see what's different (maybe it's slow) and some good DIFF viewer on low assembly level would be great as some CVS version diff in ECLIPSE

Thats also my style of comparing, also i use additional to IDA Pro the oldstyle HIEW Hexviewer with Assembly View which is also for editing in the file nice.

Cheers, neogen