Norton Utilities has a program, DISKEDIT I think
that allows you to open any file for examination
and low level, byte by byte editing.
I have spent many happy hours searching
through files for text strings just for fun.
DEBUG.EXE, which still comes with windows
is the most awsome tool in the world of msdos.
Search for a tutorial with your search engine
or get a very old DOS manual to get info on debug.
It can examine files, assemble and disassemble
executable files(print out the assembly lang instruc-
tions that the bytes represent) and it can enable
you to run a program one instruction at a time,
to do debugging.
