Electronics and Communication Engineering - Microprocessors - Discussion

Discussion Forum : Microprocessors - Section 5 (Q.No. 13)

Microprocessors

13.

Assertion (A): If contents of F register in 8085 are 01010001, it means S = 0, Z = 1, AC= 1, P = 0 and CY = 1.

Reason (R): When an instruction is called from memory, the op. code of instruction is stored in instruction register.

Both A and R are correct and R is correct explanation of A

Both A and R are correct but R is not correct explanation of A

A is correct R is wrong

A is wrong R is correct

Answer: Option

Explanation:

No answer description is available. Let's discuss.

Discussion:

2 comments Page 1 of 1.

Utkarsh said: 7 years ago

Yes, the flag register updates after ALU operation. Instruction register excludes Accumulator and include other register pair wrt 8085.

Vishal said: 1 decade ago

As per my knowledge flag register update only after any ALU operation.

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