A

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Q. A RIM instruction is used to

  • (A) Disable the interrupt 7.5, 6.5, 5.5
  • (B) Read in the serial input data
  • (C) Read in status of pending interrupts, if any
  • (D) both (b) and (c)
  • Correct Answer - Option(D)
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Explanation by: Admin

RIM (Read Interrupt Mask) is an instruction used in 8085 microprocessor.

  • It is used to:
    • Read the status of interrupt lines (like whether interrupts 7.5, 6.5, 5.5 are pending or masked).
    • Read serial input data (SID) line.

Hence, it performs both:

  • (B) Read in the serial input data, and
  • (C) Read in status of pending interrupts, if any.

So, the correct choice is: (D) both (b) and (c).

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