Re: Question about Assignment 1 #2

Ed Casas (edc@ece.ubc.ca) Sun, 15 Oct 2000 17:56:06 -0700 

Date: Sun, 15 Oct 2000 17:56:06 -0700
From: Ed Casas <edc@ece.ubc.ca>
Subject: Re: Question about Assignment 1 #2



> Do anyone know how to test the code for question 2?  How do you
> know what is in the CS and IP and verify the output is correct?

- run the DOS command "debug" and use the command "d 0:0" to show
the contents of the first part of the interrupt vector memory

- put values elsewhere in memory (using db or dw) and modify your
program to print starting at that location

- write a C program that does the same thing and compare the two
outputs [the program must be compiled to run in DOS (real-mode)]

- make sure the output is not all "0000" or all "FFFF" and hope
for the best

- other ideas?

-- 
Ed Casas   edc@ece.ubc.ca   http://casas.ece.ubc.ca   +1 604 822-2592