Advance Computer Architecture - CS501 ASSIGNMENT 4

	Assignment No. 04 Semester Spring 2011 Advance Computer Architecture - CS501				Total Marks: 15 Due Date: 19/06/2011
Objective: To learn and understand basic concepts of I/O subsystems, and DMA Instructions: Please read the following instructions carefully before solving & submitting assignment: Assignment should be in your own wordings not copied from net, handouts or books. It should be clear that your assignment will not get any credit (zero marks) if: The assignment is submitted after due date. The submitted assignment does not open or file corrupt. The assignment is copied (from other student or copy from handouts or internet). Student ID is not mentioned in the assignment File or name of file is other than student ID. Note: You have to provide solution with all the calculations and formulations involved, else no marks will be awarded. For any query about the assignment, contact at cs501@vu.edu.pk GOOD LUCK
Question No 1			10 Marks
An I/O device transfers data at a rate of 5MB/s over a 100MB/s bus. The data is transferred in 2KB blocks. If the processor operates at 500MHz, and it takes a total of 5000 cycles to handle each DMA request, find the fraction of CPU time handling the data transfer with and without DMA.
Question No 2				5 Marks
A 4 K byte block of data is read from a disk drive. What is the overall data transmission rate if the disk drive has a latency of 7 ms, and a burst bandwidth of 2 MB per second?

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By: Digital Communication

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