GATE EE

Microprocessor

Digital Electronics

(Past Years Questions)

Marks 1

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In $$8085A$$ microprocessor, the operation performed by the instruction $$LHLD$$ $${2100_H}$$ is
GATE EE 2014 Set 3
An input device is interfaced with Intel $$8085$$ $$A$$ microprocessor as memory mapped $${\rm I}/O,$$ the address of th...
GATE EE 2008
The logic circuit used to generate the active low chip select $$(CS)$$ by an $$8085$$ microprocessor to address a periph...
GATE EE 2002
When a program is being executed in an $$8085$$ microprocessor, its Program Counter contains
GATE EE 2002
Which one of the following is not a vected interrupt?
GATE EE 2000
In a microprocessor, the address of the next instruction to be executed, is stored in
GATE EE 1997
The range of address for which the memory chip shown in Figure, will be selected is .... to ......... ...
GATE EE 1997
In an $$8085$$ microprocessor, after the execution of $$XRA$$ $$A$$ instruction
GATE EE 1995
The contents of the accumulator in an $$8085$$ microprocessor is altered after the execution of the instruction.
GATE EE 1994
Three devices $$A,$$ $$B$$ and $$C$$ have to be connected to a $$8085$$ microprocessor. Device $$A$$ has highest priorit...
GATE EE 1993
If the $$HLT$$ instruction of a $$8085$$ microprocessor is executed,
GATE EE 1992

Marks 2

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In an $$8085$$ microprocessor, the following program is executed At the end of program, register $$A$$ contains...
GATE EE 2014 Set 2
An output device is interfaced with $$8$$ bit microprocessor $$8085$$$$A.$$ The interfacing circuit is shown in figure ...
GATE EE 2014 Set 1
A portion of the main program to call a subroutine $$SUB$$ in an $$8085$$ environment is given below: $$\eqalign{ & LX...
GATE EE 2011
When a $$''CALL$$ $$addr'$$ instruction is executed, the $$CPU$$ carries out the following sequential operations interna...
GATE EE 2010
In $$8085$$ microprocessor, the contents of the Accumulator, after the following instructions are executed will become $...
GATE EE 2009
The contents (in Hexadecimal) of some of the memory locations in an $$8085A$$ based system are given below The content...
GATE EE 2008
In an $$8085$$ $$A$$ microprocessor based system, it is desired to increment the contents of memory location whose addre...
GATE EE 2007
Which one of the following statements regarding the $$INT$$ (interrupt) and the $$BRQ$$ (bus request) pins in a $$CPU$$ ...
GATE EE 2007
The associated figure shows the two types of rotate right instruction $${R_1},\,{R_2}$$ available in a microprocessor wh...
GATE EE 2007
The associated figure shows the two types of rotate right instruction $${R_1},\,{R_2}$$ available in a microprocessor wh...
GATE EE 2007
A software delay subroutine is written as given below: How many times $$DCR$$ $$L$$ instruction will be executed?...
GATE EE 2006
The $$8085$$ assembly language instruction that stores the content of $$H$$ and $$L$$ registers into the memory location...
GATE EE 2005
The following program is written for an $$8085$$ microprocessor to add two bytes located at memory addresses $$1FFE$$ an...
GATE EE 2003
An Intel $$8085$$ processor is executing the program given below. $$\eqalign{ & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,...
GATE EE 2001
The stack pointer of a microprocessor is at $$A001H.$$ At the end of execution of following instructions, the value of s...
GATE EE 1994

Marks 3

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In a $$8085$$ microprocessor, the following instructions may result in change of accumulator contents and change in sta...
GATE EE 1996

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