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Microprocessor

Microprocessor
How many bytes in a zero memory page should be reserved for vectors used by RST instructions?

 16.
 64.
 128.
 32.

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Microprocessor
The data bus of any microprocessor is always

 Either unidirectional or bi-directional
 Bi-directional
 Unidirectional
 None

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Microprocessor
_____________is used to read the status of the hardware interrupts (RST 7.5, RST 6.5, RST 5.5) by loading into the A register a byte which defines the condition of the mask bits for the interrupts.

 DI
 RIM
 SIM
 EI

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Microprocessor
Which of the following is not treated as hexadecimal constant by assembler in 8085?

6 AFH
45 H
64 H
234

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Microprocessor
How many T-states are required for execution of OUT 80H instruction?

 16
 13
 10
 7

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

 XRI 0FH
 ANI OFH
 ANI F0H
 XRI FOH

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