Microprocessor - May 2013

MU Computer Engineering (Semester 5)

Total marks: --
Total time: -- INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary 1(a) Explain the memory segmentation in Intel 8086 processor with its advantages and disadvantages 10 marks

1(b) Explain interrupts of Intel 8086 microprocessor. 10 marks

2(a) Design an 8086 based system with following specifications:-
(i) 8086 working at 8Mhz
(ii) 32 kbytes EPROM using 16kb devices
(iii) 64 kbytes RAM using 32kB devices
Draw the complete schematic of the design indicating address map. 10 marks

2(b) Explain the following Intel 8086 assembly language instruction giving example
(1) TEST (2) NOP (3) STOS (4) DAA (5) SAR 10 marks

3(a) Explain the operating modes of 8255 PPI including handshaking operation. 10 marks

3(b) Explain the operating modes of 8254 PIT. 10 marks

4(a) Explain the modes of operation of DMA Controller. 10 marks

4(b) What do you understand by bus arbitration? Explain different bus arbitration techniques with diagram. 10 marks

5(a) Explain the 8288 bus controller block diagram. Explain its use. 10 marks

5(b) Explain the operation of three 8259 PIC in cascaded mode 10 marks

6(a) Explain with neat diagram memory read and write machine cycle in maximum mode. 10 marks

6(b) Explain addressing modes of 8085 with example. 10 marks

7. Write short notes on (any four)

7(b) 8284 Clock Generator 10 marks

7(c) Fixed port and Variable Port addressing 10 marks

7(d) Generation of Reset Signal in 8086 based system 10 marks

7(e) String Instructions 10 marks