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Microprocessor

Microprocessor
Temporary registers in 8085 are

 W and Z.
 B and C.
 H and L.
 D and E.

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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.

 RIM
 DI
 EI
 SIM

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Microprocessor
Which of the following is not a general purpose peripheral?

I/O port
Programmable interrupt controller
Programmable interval timer
Programmable CRT controller

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

 7
 10
 13
 16

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Microprocessor
Inintel 8085A microprocessor ALE signal is made high to

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

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Microprocessor
Which of the following is a valid integer constant?

127
127
127
125 + 3

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