cs501 assignment 3 solution

	Assignment No. 03 Semester: Spring 2015 CS501 - Advance Computer Architecture	Total Marks: 15 Due Date:  27/07/2015
Instructions: Please read the following instructions carefully before submitting assignment: It should be clear that your assignment will not get any credit if: §  The assignment is submitted after due date. §  The assignment is submitted by email. §  The submitted assignment does not open or file is corrupt. §  All types of plagiarism are strictly prohibited. §  It is in some format other than .doc (Microsoft Word). Objectives: §  To learn and understand the basic concepts of I/O bus in CPU. For any query about the assignment, contact at cs501@vu.edu.pk Question 1                                                                                                                                                    Marks 10  Problem Statement: Consider a 16-bit parallel output port attached with the FALCON-A CPU as shown in the figure below: This port has been mapped onto address DEh of the FALCON-A’s I/O space. To display the data being received from the FALCON-A’s data bus, sixteen (16) LED branches are used. Every LED branch is wired in such a way that when a 1 appears on the particular data bus bit, it turns the LED on; a 0 turns it off. Question: Which LEDs will be ON when the below given OUT instruction executes on the CPU? Explain in detail.                                                OUT R2, DEh       Assume that the value of R2 is 1556h. Question 2                                                                                                                                                      Marks 5     Consider an I/O bus requires 15 nsec for bus requests, 20 nsec for arbitration and the average time to complete an operation is 12 nsec after the access to the bus has been granted, is it possible for such a bus to perform 40 million IOPS? Note: No assignment will be accepted after due date.
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