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Microprocessor

Microprocessor
In 8085 microprocessor, in response to RST 7.5 interrupts the execution is transferred to memory location

 0000H
 0034H
 003CH
 002CH

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Microprocessor
What is mean by ALU

 Arithmetic logic unit
 Arithmetic local unsigned
 Arithmetic logic upgrade
 Arithmetic logic unsigned

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Microprocessor
The operating modes of 8255 A are called

Mode 0 and mode 2
Mode 0 and mode 1
Mode 0, mode 1 and mode 2
Mode 0, mode 2 and mode 3

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Microprocessor
Inintel 8085A microprocessor ALE signal is made high to

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

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Microprocessor
In an intel 8085A, which is the first machine cycle of an instruction?

 An op-code fetch cycle
 An I/O read cycle
 A memory write cycle
 A memory read cycle

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Microprocessor
Assertion(A): Address bus is unidirectional. Reason(R): Data bus is bidirectional

 Both A & R are true but R is not the correct explanation of A
 Both A & R are true and R is the correct explanation of A
 A is false but R is true
 A is true but R is false

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