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IGNOU UNIVERSITY MCA - I (SEM 1) JUN 2010 : Computer Organisation & Assembly Language Programming

4 pages, 25 questions, 1 questions with responses, 1 total responses,

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I mc s -01 21 No. of Printed Pages : 4 MCA (Revised) Term-End Examination June, 2010 MCS-012 : COMPUTER ORGANISATION & ASSEMBLY LANGUAGE PROGRAMMING Maximum Marks : 100 (Weightage 75%) Time : 3 hours Note : Question no. 1 is compulsory and carries Attempt any three questions from the rest. 40 marks. 1. (a) How does the cache memory improve the 5 overall processing speed of a computer system ? Explain. Explain the differences between DRAM and SRAM. Draw a cell of SRAM. 5 What is an Interrupt ? What happens on the occurance of an interrupt ? 5 (d) Simplify the following boolean function in SOP and POS forms by means of K-Maps. 5 F (A, B, C, D) = (0, 2, 8, 9, 10, 11, 14, 15). MCS - 012 1 P.T.O. A machine supports 30 operations and 12 addressing modes. The machine has 128 registers and the size of its main memory is 1 MB. Design a simple instruction format for the machine. You may assume that all the instructions in this machine have one register and one memory operand. 5 Draw a block diagram to illustrate the operation of micro - programmed control unit. Explain the differences between FAR and NEAR procedures with the help of an example each. Write a program in 8086 assembly language that reverses a string stored in the data segment. 2. 5 5 (a) Explain the working of JK flip flop with the 10 help of suitable diagrams. Discuss its application in designing of a synchronous counter. (b) Explain the following instructions of 8086 10 microprocessor with the help of an example each : (i) XLAT (ii) DAS (iii) CMPS (iv) ROL MCS-012 2 3. (a) What are the various addressing schemes used for memory references ? Give an example of each. 9 Can we store control and status information in the memory. Justify your answer. Represent 23.125 10 as single and double precision IEEE 754 format/ standard. 4 (d) Explain the functioning of a DMA controller with the help of a suitable diagram. 4 (a) What is a segment in 8086 microprocessor ? Can these segments overlap ? Explain. What are the default pointers to these segments ? 5 Explain any two cache mapping schemes with the help of suitable diagrams. 8 Write a 8086 assembly language program to implement the following nested loop : 4. 3 7 for (i =1 to 10) for (j =1 to 10) add 1 to Ax. MCS-012 3 P.T.O. 5. Explain the following with the help of suitable 20 example/diagram if needed. Instruction cycle Quine Mckluskey method RISC and CISC Architecture Register Transfer Micro operations (e) Liquid Crystal Displays (LCDS) MCS-012 4

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Additional Info : Mca - I (sem 1) June 2010 Question Paper - Computer Organisation & Assembly Language Programming(Revised Course
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