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Microprocessor

Microprocessor
What is the size (in bytes) of Prefetch queue in 8086?

 2.
 6.
 4.
 3.

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Microprocessor
In an 8085 microprocessor based system, the contents of SP are 1000H, PUSH B instruction will transfer the contents of registers B & C respectively for memory locations

 1000 H and 1001 H
 0FFE H and 0FFF H
 0FFF H and 0FFE H
 1000 H and 0FFF H

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Microprocessor
I)A total of about one million bytes can be directly addressed by the 8086 microprocessor II)8086 has thirteen 16-bit registers III)8086 has eight flags IV)Compared to 8086, the 80286 provides a higher degree of memory protection Which one of the statements given above are correct?

 1,2 & 4
 1,3 &4
 2,3&4
 1,2 & 3

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Microprocessor
Assuming LSB is at position 0 and MSB at position 7, which bit positions are not used (Undefined) in flag register of an 8085 microprocessor?

 2, 3, 5
 1, 3, 4
 1, 2, 5
 1, 3, 5

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

 16
 7
 10
 13

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Microprocessor
A microprocessor differentiates between op code, data/address at any time by

 the stack pointer
 the sequence in which memory contents are fetched by it
 the program counter
 its internal registers

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