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Write a program to generate a delay of 1 milli-second in 8086 microprocessor.
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Explain the need to demultiplex the bus AD7-AD0
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Write a program using the ADI instruction to add the two hexadecimal numbers 3AH and 48H and to display the answer at the output port. Briefly explain.
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Which addressing mode in 8085 moves a byte (or a word) between a memory location and a register? Also give an example of this type of
addressing.
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Ten hexadecimal numbers are stored in RAM locations 50H onwards. Write a program to find the largest number in set. The largest number
should be saved in 60H.
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How do you classify the 8051 instructions based on i) length of instruction ii) addressing mode ii) function performed? Give two
example of each.
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Explain TMOD and TCON registers of 8051 in detail.
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Write an assembly language program to move a block of data from the location 5000H to the location 8000H using 8085 microprocessor (for block of 6 byte).
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Write a note on memory organization in the 8051 and also write the functions of RSO and RS1 bits in the PSW of 8051.
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Explain the interfacing of 8254 with 8086 with the help of neat diagram.
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Write a program to generate a delay of 1 milli-second in 8086 microprocessor.
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Write the different features of the programmable interrupt controller(8259).
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How does an 8086 microprocessor recognize an NMI interrupt?
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Compare the merits and demerits of asynchronous communication with synchronous communication.
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What are the classes of control transfer instruction used in 8051 microcontroller?
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What are the advantages of microprogrammed control?
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What are the different registers in
8085
What are the different programmable
microprocessor? Explain all.
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Explain the interfacing of 8 bit DAC with 8086 through 8255 in IO mapped 10 technique. Also write a program to generate square wave.
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What are the different vectored interrupts in 8085 microprocessor? Briefly explain.
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In what way is the Intel 8253 timer different from the Intel 8254
timer?
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What are the ways to mask an interrupt in 8051 microcontroller?
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Write the format of the 8051 processor status word (PSW).
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How can you put the 8051 microcontroller in an idle mode?
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Write an assembly language program in 8051 to find 2's complement of a number.
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Explain the complete architecture of Intel 8051 microcontroller with suitable diagram.
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Draw the functional pin diagram of keyblard and display controller(8279).
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Interface a DAC to the 8086 microprocessor with a clock frequency of
5 MHz and write program to generate a ramp waveform of T=3 msec.
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What is the function of data bus buffer in USART (8251)?
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Explain input and output modes of operation of 8279 in detail.
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How can 8255 be made to work in handshaking mode? Specify the input mode and output mode separately.
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Write an 8086 assembly language program to find the factorial of the given byte of data using a recursive algorithm.
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Explain the different data transfer instructions in 8086 giving examples for each.
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The contents of different registers in 8086 are given by CS=FOOOH, DS-1000H, SS= 2000H and ES =3000H. Find base address of the different segments in the memory.
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Why is memory divided into the segments in the 8086 microprocessor?
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What is the main difference between minimum and maximum mode operation of 8086 microprocessor?
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Explain how many times the following loop will be executed: LXI B,0007H
LOOP: DCX B
MOV A.B
ORA C JNZ LOOP
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Draw the architecture of 8253 timer and write down its control word. Explain its working
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Attempt : Explain 10/M ALE pin of 8085 Microprocessor.
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By giving suitable examples explain different addressing modes of 8051 microcontroller.
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Show the Internal RAM structure of 8051 microcontroller.
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Briefly discuss the features of 8051 Microcontroller.
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Discuss various flag of 8086.
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Draw the register organization of 8086 and explain typical applications of each register.
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What do you mean by pipelined architecture? How is it implemented in 8086?
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Write a program to display the following "ALL OF US ARE HERE" and rotate it in address and data LEDS. Use 8279 chip.
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Attempt : What are flag registers? Explain auxiliary carry and parity flag of 8085 microprocessor.
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An 8 bit ADC is being used for digitising an analog sensor output. If ADC output pins are connected to
port A of 8255. SOC and EOC pin are connected to PCO and PC7 respectively. WAP to input the sensor
data every minute and store it in memory location EXDATA.
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Interface a 8255 PPI with 8085 such that control register address is FFH.
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Interrupt requests are arriving at RST 6.5 pin, at a rate of 200 requests/second. Write a program to
utilize these pulses, to design a real time clock, which will count up to 1 hour. Keep the count of
seconds, minutes and hour in 3 memory locations SECOND, MINUTE and HOUR respectively. Once 1
hour is over, disable the interrupts. Assume interrupting pulses are sufficiently long enough to be
recognized.
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Write RIM and SIM word structure of 8085 and explain the function of each it.
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What do you understand by FEO? Explain by giving suitable examples.
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Show the timing diagram of MOV A,B.
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Interface a 4K ROM and BK RAM with 8085 (take starting address of RAM 6000H).
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Explain the use of WZ registers of 8085.
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Write a program to find the square root of a number. Also explain it with the help of suitable flow chart.
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Explain architecture of 8251 USART with the help of neat diagram.
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Explain the interfacing of 8254 with 8086 with the help of neat diagram .
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What are the difference between 8085 and 8086 microprocessor architecture?
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Write a program to find the factorial of a given number using 8086 microprocessor
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With the help of neat diagram, explain the architecture of 8086 microprocessor along with function of each block and register.
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Explain the difference between 8253 and 8254 IC.
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Draw and explain hardware interrupt structure 8085 microprocessor.
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Write a program to generate Fibonacci series.
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Show the internal architecture of 8085 and write down its features.
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Attempt
Explain the difference between MOVX and MOVC instruction of 8051 microcontroller
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Attempt
Find the period of the machine cycle if crystal frequency for 8051 based system is 11.0592 MHz.
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Attempt
Write operating modes of 8253.
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Attempt
What will be the contents of carry flag and zero flag after execution of instruction CMP C if register A contains 70H and resister C contains 27H.
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Attempt
Explain the function of bus interface unit.
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Attempt
Why IC8259 is needed?
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Attempt
Explain control word register of 8255.
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Attempt
Explain how physical address is generated in 8086 microprocessor?
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