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Microprocessor

Microprocessor
The number of output pins in 8085 microprocessors are

 27.
 19.
 21.
 40.

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Microprocessor
While STC instruction executes,

 no flags will be affected.
 only carry and zero flags will be affected.
 all flags will be affected.
 only carry flag will be affected.

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Microprocessor
Consider the following I) Sign flag II) Trap flag III) Parity flag IV) Auxiliary carry flag. Which one of the above flags is/are present in 8085 microprocessor?

 (I) ,(III) & (IV)
 (II) & (III)
 (I) only
 (I) & (II)

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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 achieve all the functions listed above
 To latch data D0-D7 from data bus

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Microprocessor
During which T-state, contents of OP code from memory are loaded into IR (Instruction Register)?

 T2 OP code fetch
 T3 OP code fetch
 T4 OP code fetch
 T1 OP code fetch

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

 ANI F0H
 XRI 0FH
 ANI OFH
 XRI FOH

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