{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

fa06-sw-sf

# fa06-sw-sf - ECE 2030 1:00pm 5 problems 4 pages Problem 1(3...

This preview shows pages 1–2. Sign up to view the full content.

ECE 2030 1:00pm Computer Engineering Fall 2006 5 problems, 4 pages Final Exam Solution 14 December 2006 1 Problem 1 (3 parts, 27 points) Microcode Using the supplied datapath, write microcode fragments to accomplish the following procedures. Express all values in hexadecimal notation. Use ‘X’ when a value is don’t cared. For maximum credit, complete the description field. Recall that means XOR. Use only registers 1, 2, and 3. Part A (15 points) 8 5 ) ( 4 3 2 1 1 + = R R R R . # X Y Z rwe im en im va au en -a /s lu en lf su en st description 1 2 3 2 1 0 X 0 X 1 6 0 X R2 <- R2 xor R3 2 1 X 1 1 1 FFFE 0 X 0 X 1 1 R1 <- R1 * 4 3 1 2 1 1 0 X 1 0 0 X 0 X R1 <- R2 + R1 4 1 X 1 1 1 0005 1 1 0 X 0 X R1 <- R1 - 5 5 1 X 1 1 1 0003 0 X 0 X 1 1 R1 <- R1 / 8 Part B (6 points) Assume R 1 contains three packed unsigned integer bytes (A, B, and C). Assume A is the least significant byte, then B, then C. Write a microcode fragment that unpacks B, placing it in the lowest eight bits of R 1 . All other bits should be zero. # X Y Z rwe im en im va au en -a /s lu en lf su en st description 1 1 X 1 1 1 0008 0 X 0 X 1 0 R1 <- R1 >> 8 2 1 X 1 1 1 00FF 0 X 1 8 0 X R1 <- R1 & FF

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern