1
GATE EE 2014 Set 3
MCQ (Single Correct Answer)
+1
-0.3
In $$8085A$$ microprocessor, the operation performed by the instruction $$LHLD$$ $${2100_H}$$ is
A
$$\left( H \right) \leftarrow {21_H},\,\left( L \right) \leftarrow {00_H}$$
B
$$\left( H \right) \leftarrow M\left( {{{2100}_H}} \right),\,\left( L \right) \leftarrow M\left( {{{2101}_H}} \right)$$
C
$$\left( H \right) \leftarrow M\left( {{{2101}_H}} \right),\,\left( L \right) \leftarrow M\left( {{{2100}_H}} \right)$$
D
$$\left( H \right) \leftarrow {00_H},{\mkern 1mu} \left( L \right) \leftarrow {21_H}$$
2
GATE EE 2008
MCQ (Single Correct Answer)
+1
-0.3
An input device is interfaced with Intel $$8085$$ $$A$$ microprocessor as memory mapped $${\rm I}/O,$$ the address of the device is $$2500H.$$ In order to input data from the device to accumulator, the sequence of instructions will be
A
$$\eqalign{ & LX{\rm I}\,\,\,H,2500H \cr & \,\,\,\,MOV\,\,A,M \cr} $$
B
$$\eqalign{ & LX{\rm I}\,\,\,H,2500H \cr & \,\,\,\,MOV\,\,M,A \cr} $$
C
$$\eqalign{ & LHLD\,\,\,2500H \cr & \,\,\,\,MOV\,\,A,M \cr} $$
D
$$\eqalign{ & LHLD\,\,\,2500H \cr & \,\,\,\,MOV\,\,M,A \cr} $$
3
GATE EE 2002
MCQ (Single Correct Answer)
+1
-0.3
The logic circuit used to generate the active low chip select $$(CS)$$ by an $$8085$$ microprocessor to address a peripheral is shown in Fig. The peripheral will respond to addresses in the range. GATE EE 2002 Digital Electronics - Microprocessor Question 21 English
A
$$E000$$ $$-$$ $$EFFF$$
B
$$000E-FFFE$$
C
$$1000-FFFF$$
D
$$0001-FFF1$$
4
GATE EE 2002
MCQ (Single Correct Answer)
+1
-0.3
When a program is being executed in an $$8085$$ microprocessor, its Program Counter contains
A
the number of instructions in the current program that have already been executed
B
the total number of instructions in the program being executed
C
the memory address of the instruction that is being currently executed
D
the memory address of the instruction that is to be executed next
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