Pase instruction.
instruction format:

   (label:) memonic (dest (,src)) (;comment)
Refactor the instruction parsation to a separate file.
And expose the function: next_instruction(struct instruction *)
Copy my graduation project, a disassembler to this a86 project.
The former consists of only one so simple file(mydisasm.c) that
I afraid I can't graduate with it. But other students feel
writing a disassembler is NB. :-)
Then I add two pdfs, which is the main knowledge
source for my graduation project.