The registers that are not accessible by the user are

Electronics and Communication Engineering (ECE) : Microprocessors - Quiz(MCQ)

IP and IE

TMP1 and TMP2

Instruction registers

Accumulator and B register

Correct Answer : Option (B) : TMP1 and TMP2

Explanation : The arithmetic operations are performed over the operands held by the temporary registers, TMP1 and TMP2. Users cannot access these temporary registers.

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