CS 401 Computer Architecture and Assembly Language

06 Jun CS 401 Computer Architecture and Assembly Language

Posted at 07:14h in 2General studies by Blogger

Question

CS 401 Computer Architecture and Assembly Language
Programming Management,
Assignment #06
Deadline
Your assignment must be uploaded / submitted before or on 16/7/2016

Upload Instructions
Please view the assignment submission process document provided to you by the Virtual
University to upload the assignment.

Rules for Marking
Please note that your assignment will not be graded if:
It is submitted after due date
The file you uploaded does not open
The file you uploaded is copied from some one else
It is in some format other than .doc

Objective
The assignment has been designed to enable you:

To know about Real time interrupts.
To know about Terminate and Stay Resident Program.
To know about Parallel Port.

Q#1. Answer the following questions:
a.
b.
c.
d.
e.

Why we disable the interrupts system while hooking the interrupt.
Which instructions are used to tell the PIC about the end of an interrupt?
What is the difference between function 4C and 31 of INT 21h?
Which I/O ports are used for data and acknowledgement to the parallel ports?
Which bit of acknowledge is used to generate IRQ7

Q#2. Write a keyboard interrupt handler that disables the timer interrupt (no timer
interrupt should come) while left shift is pressed. It should be re-enabled as soon as left
shift is released.

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