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Microprocessor

Microprocessor
Which of the following instruction will never affect the zero flag?

 DCX Rp
 DCR R
 ORA R
 XRA R

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Microprocessor
How many 16-bit special purpose registers are present in 8085 microprocessor?

 2
 8
 6
 16

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Microprocessor
The control flags in 8086 are:

All of these
 the direction flag(DF).
 the Trap flag(TF).
 the interrupt flag(IF).

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Microprocessor
The five flags in 8085 are designated as

Z, C, S, P, AC
Z, CY, S, P and AC
Z, CY, S, D, AC
D, Z, S, P, AC

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Microprocessor
Using DeMorgan’s Theorem we can convert any AND-OR structure into

NAND-NOR
OR-NAND
NAND-NAND
NOR-NAND

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Microprocessor
The processor status word of 8085 microprocessor has five flags namely:

 S, Z, AC, P, CY
 S, OV, AC, P, CY
 S, Z, AC, P, OV
 S, Z, OV, P, CY

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