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Microprocessor

Microprocessor
A single instruction to clear the lower nibble of accumulator in 8085 language assembly is

 XRI FOH
 XRI 0FH
 ANI OFH
 ANI F0H

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Microprocessor
Inintel 8085A microprocessor ALE signal is made high to

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

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Microprocessor
A 37 bit mantissa has an accuracy of

6 decimal places
8 decimal places
11 decimal places
10 decimal places

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Microprocessor
Which instruction is required to rotate the content of accumulator one bit right along with carry?

 RAL
 RAR
 RLC
 RRC

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Microprocessor
In 8085, the pins for SID and SOD are

5 and 4 respectively
3 and 4 respectively
4 and 3 respectively
4 and 5 respectively

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Microprocessor
Which one of the following ICs is used to interface keyboard and display?

 8259
 8253
 8279
 8251

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