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Microprocessor

Microprocessor
In order to complement the lower nibble of accumulator one can use

 XRI 0FH
 CMA
 ANI 0FH
 ORI 0FH

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Microprocessor
XCHG instruction exchanges the content of H-L with ______ register pair.

 PSW
 B-C
 D-E
 Stack Pointer

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Microprocessor
The first machine cycle of an instruction is always

 A memory write cycle
 A memory read cycle
 A fetch cycle
 An I/O read cycle

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Microprocessor
Temporary registers in 8085 are

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

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Microprocessor
If the number of address bits in a memory is reduced by 2 and the addressability is doubled, the size of the memory (i.e., the number of bits stored in the memory)

Halves
Remains unchanged
Doubles
Increases by 2^(address bits)/addressability

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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?

 2,3&4
 1,2 & 3
 1,2 & 4
 1,3 &4

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