OFFICE OF ACADEMIC AFFAIRS Reference No. : XMUM.OAA - 100/2/8-V2.0 Effective Date : 23 APRIL 2018 DESCRIPTION OF COURSEWORK Course Code CST301 Course Name Principles of computer composition Lecturer Wang Yiju Academic Session 2021/09 Assessment Title Assignment 3 A. Introduction/ Situation/ Background Information This assignment provides an avenue for students to better understand data representation, computer organization, computer arithmetic, the functions of CPUs and their working model, registers of different CPUs and six important status flags, and main memory. B. Course Learning Outcomes (CLO) covered At the end of this assessment, students are able to: CLO 1 Explain the principles underlying computer system design and development. CLO 3 Evaluate the performance of CPU, memory and I/O operations CLO4 Design a basic computer system using the major components. C. University Policy on Academic Misconduct 1. Academic misconduct is a serious offense in Xiamen University Malaysia. It can be defined as any of the following: i. Plagiarism is submitting or presenting someone else’s work, words, ideas, data or information as your own intentionally or unintentionally. This includes incorporating published and unpublished material, whether in manuscript, printed or electronic form into your work without acknowledging the source (the person and the work). ii. Collusion is two or more people collaborating on a piece of work (in part or whole) which is intended to be wholly individual and passed it off as own individual work. iii. Cheating is an act of dishonesty or fraud in order to gain an unfair advantage in an assessment. This includes using or attempting to use, or assisting another to use materials that are prohibited or inappropriate, commissioning work from a third party, falsifying data, or breaching any examination rules. 2. All the assessment submitted must be the outcome of the student. Any form of academic misconduct is a serious offense which will be penalised by being given a zero mark for the entire assessment in question or part of the assessment in question. If there is more than one guilty party as in the case of collusion, both you and your collusion partner(s) will be subjected to the same penalty. D. Instruction to Students submission type: Softcopy submission due date: Dec 27, 2021. E. Evaluation Breakdown No. 1. Component Title Assignment TOTAL Percentage (%) 10% 10% F. Task(s) Question 1 (60 marks) [10 marks each] Assume that BX, SI, and DI contain the following value: (BX) = 0200H (SI) = 8124H (DI) =FF78H, (DS)=0000H The memory locations contain the following values: mem(1200H) = 82ABH mem(0200H) = 3CD6H mem(8324H) = 1AB4H and that label ALPHA has the following value with address 1000H: ALPHA 1200H For each of the following instructions (executed separately), specify the addressing mode used, write the expression for effective address EA in register transfer language, calculate it, and give the result of operation. (a) ADD BX, 1234H (b) ADD SI, [BX] (c) SUB DI, [BX][SI] (d) MOV ALPHA, BX (e) MOV AX, [BX]ALPHA (f) LEA AX, ALPHA Question 2 (20 marks) [4 marks each] Given two binary signed numbers in two’s compliment representation: A=01101101 B=10110010 and two labels ALPHA and BETA with addresses 00010100H and 00A8B0C8H for locating A and B in memory, respectively. Write an instruction or a shortest sequence of instructions with proper addressing modes for performing each of the following independent activities. (a) Move number A to register BX (b) Move number B to memory location whose address is in register EBX (c) Add number A in register BX to number B in memory with address in register ESI. (d) Subtract number A in register BX from number B in memory with address BETA. (e) Move address of ALPHA to register EBX Question 3 (20 marks) [5 marks each] Given the following data before execution of instruction, Address 20002 20004 20006 20008 2000A Contents EDBC 345C 08BC BE60 2CA7 (DS)=(SS)=2000H (SP)=0006H BX=0003H AX=A34DH for each of the indicated instructions (executed separately), write the expressions for the effective addresses of the source and destination operands in register transfer language, calculate them, and give the resulting contents of register and the contents of affected memory locations after execution. 1) 2) 3) 4) ADD BX, [0003] PUSH BX POP BX AND AX, [BX+0004H]
