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Microprocessor

Microprocessor
SPHL instruction copies the content of H-L register pair to the _________.

 PSW
 B-C
 D-E
 Stack Pointer

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Microprocessor
Which of the following conditions is not allowed in an RS latch?

R is asserted, S is negated
R is negated, S is asserted
R is negated, S is negated
R is asserted, S is asserted

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Microprocessor
Inintel 8085A microprocessor ALE signal is made high to

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

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Microprocessor
A mask programmed ROM is

 programmed at the time of fabrication
 programmed by the user
 erasable electrically
 erasable and programmable

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Microprocessor
A number of 1-bit registers used in microprocessors to indicate certain conditions are usually referred to as

 shift registers
 counters
 flags
 latches

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Microprocessor
Using one 8259 IC is equivalent to providing …………. INTR pins on 8085

 16
 18
 12
 8

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