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Microprocessor

Microprocessor
In order to save accumulator value on the stack, which of the following instruction may be used

 PUSH A
 PUSH SP
 POP PSW
 PUSH PSW

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Microprocessor
Inintel 8085A microprocessor ALE signal is made high to

 To disable data bus
 To latch data D0-D7 from data bus
 Enable the data bus to be used as low order address bus
 To achieve all the functions listed above

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Microprocessor
Each instruction in an assembly language program has the following fields 1. Label field 2. Mnemonic field 3. Operand field 4. Comment field What are the correct sequence of these fields?

 1, 3, 2 and 4
 1, 2, 3 and 4
 2, 4, 1 and 3
 2, 1, 4 and 3

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Microprocessor
The number of hardware interrupts present in 8085 microprocessor are

 5
 16
 10
 8

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Microprocessor
PSW stands for

 flag byte
 none
 accumulator and flag register contents
 accumulator contents

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Microprocessor
Consider the following registers: 1. Accumulator and flag register 2. B and C register 3. D and E register 4. H and L register Which of these 8-bit registers of 8085 microprocessor can be paired together to make a 16-bit register?

 1, 2 and 4
 2, 3 and 4
 1, 2 and 3
 1, 3 and 4

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