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Microprocessor

Microprocessor
The five flags in 8085 are designated as

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

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Microprocessor
Consider the following I) Sign flag II) Trap flag III) Parity flag IV) Auxiliary carry flag. Which one of the above flags is/are present in 8085 microprocessor?

 (I) ,(III) & (IV)
 (I) only
 (I) & (II)
 (II) & (III)

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Microprocessor
The reason for the presence of ALE pin in 8085, but not in 6800 is that

 8085 has multiplexed bus, whereas 6800 does not have
 8085 has 5 interrupts lines, whereas 6800 has only two
 None
 8085 uses I/O mapped I/O, whereas 6800 uses memory mapped I/O

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Microprocessor
PSW stands for

 accumulator contents
 accumulator and flag register contents
 none
 flag byte

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Microprocessor
When any data transfer instruction, to transfer the data from memory to microprocessor, is executed the condition flags are

 always set
 affected indicating specific conditions
 always reset
 not affected

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Microprocessor
Consider the following statements: Arithmetic Logic Unit (ALU) 1.Performs arithmetic operations 2.Performs comparisons. 3.Communicates with I/O devices 4.Keeps watch on the system Which of these statements are correct?

 1, 2 and 3
 1, 2, 3 and 4
 1 and 2 only
 3 and 4 only

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