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Microprocessor

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

 16
 10
 7
 13

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Microprocessor
How many segments are there in 8086?

 2.
 4.
 3.
 6.

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Microprocessor
In order to save accumulator value on the stack, which of the following instruction may be used

 POP PSW
 PUSH SP
 PUSH A
 PUSH PSW

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Microprocessor
The content of the A15-A8 (higher order address lines) while executing “IN 8-bit port address” instruction are

 all bits set (i.e. FFH)
 irrelevant
 same as the content of A7-A0
 all bits reset (i.e. 00H)

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Microprocessor
In microprocessor based system I/O ports are used to interface

 the I/P device only
 all the I/O devices
 the I/O devices and memory chips
 the O/P devices only

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Microprocessor
Which one of the following instruction may be used to clear the accumulator content irrespective of its initial value?

 CLR A
 ORA A
 SUB A
 MOV A, 00H

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