Madras University (UnOM) 2005 M.C.A Micro Processor - Question Paper

Part A(5*2=10)

1.What is the difference ranging from a CMP instruction and a CMPS instruction in 8086?
2.List the 7 string instruction of 8086?
3.What is the function of the BHE control signal in 8086?
4.State the advantage of hankshaking over simple parallel I/O.
5.What is cache memory?Why is its capacity small?

Part B(4*5=20)

6.State and discuss any 2 development tools available for writing assembly language programs for 8086.
7.What are assembler directives? State any 5 assembler directives of 8086 and provide their meaning.
8.Distinguish ranging from minimum mode system and maximum mode system of 8086.
9.A in terrupt with vector (75) to the base 10 hs its service routine written in memory address location 12345 to the base M. show how this is loaded in the interrupt vector table.
10.Explain how handshaking is done. discuss any 3 hankshaking signals used in 8086.
11.Describe how a DRAM is constructed. provide its advantages and disadvantages over SRAM.

Part C(5*10=50)

12. a) discuss any 4 standard programs structures used in 8086 with examples.
or
b)Write an assembly language program for 8086 to convert a 4 digit BCD number stored in the BX register into its binary equivalent and store the outcome in the DX register.

13. a) Write an assembly language program for 8086 to obtain from a character string whether the alphabet 'A' occurs. If its occurs store FFFF in AX and if not store 0000 in Ax
or
b) What is Macro? With example expalin any 5 feature of a macro/

14. a) define with a diagram the architecture of the execution unit of 8086.
or
b) define with a block diagram the architecture of any 1 programmable timer/counter.

15. a) discuss with the suitable diagrams how an ADC is interfaced with 8086.
or
b) define in detail how a stepper motor is controlled using 8086.

16. a) discuss how an I/O Coprocessor is used with 8080.What are the uses of an I/O Coprocessor
or
b) Bring out the salient features of 80386

Earning:   Approval pending.