Question Papers of IGNOU MCA-NEW MCS012


MCS012: Computer Organisation and Assembly Language
Year: 2005 TEE: December Time 3 Full Marks 100
Note: Question 1 is compulsory. Answer any three from the rest.

Q.1(e): What is a miro-operation? How is it different from an instruction of a computer? Explain the steps of 'instruction fetch' and 'interrupt processing'.

Q.1(f): Starting from an initial value of R = 11011011, determine the sequence of binary values in R after a logical shift-left followed by a circular shift-right, followed by a logical shift-right, followed by a circular shift=left and an arithmatic shift-right : [3]

Q.1(g): Write a program in 8086 assembly language to add two single-digit ASCII numbers, stored in CL and BL registers, The result should be in AX register (AL having the value and AH having the carry bit).: [4]

Q.1(h): Simplify the following expression in SOP form using a K-map.
F(A,B,C,D)=AB + BC + AD: [5]


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