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NATIONAL OPEN UNIVERSITY OF NIGERIA
UNIVERSITY VILLAGE, PLOT 91, CASDASTRAL ZONE, NNAMDI AZIKIWE EXPRESS WAY, JABI, ABUJA.
FACULTY OF SCIENCES
JANUARY/FEBRUARY 2013 EXAMINATION
COURSE CODE: CIT411
COURSE TITLE: Microcomputers and Microprocessors
TIME ALLOWED: 2 Hours
INSTRUCTIONS: Answer any Four (4) Questions in all
Q1.a Write short note on microcomputer networking [7½ marks]
b. Discuss three main subcategories of Computer architecture. [10 marks]
Q2.a Give three (3) benefits of Direct Memory Access and list three (3) devices used for DMA. [7½marks]
b. Discuss five (5) microprocessor operations. [10 marks]
Q3.a Write short note on system bus. [7½ marks]
b. Write short note on three (3) uses of a microcomputer. [10 marks]
Q4.a Explain Direct Memory Access. [7½ marks]
b. List and explain four (4) formats for specifying operands / ADDRESSING MODES For 8085. [10 marks]
Q5.a Discuss five (5) types of microcomputer networking. [10 marks]
b. Write short note on four (4) technological innovations of microprocessors [7½ marks]
Q6.a Write short note on memory organization and segmentation. [10 marks]
b. Discuss interrupts. [7½ marks]
