Discussion
SIM instruction in 8085 stands for :
Answer: C
SIM stands for set interrupt mask.
SIM takes the contents of the accumulator and uses them to mask or unmask the RST 7.5, 6.5 and 5.5 interrupts, reset the RST 7.5 flip-flop, and send a bit on the serial output data line SOD. Its companion RIM (read interrupt mask) reads the mask status, pending interrupts and the serial input SID.
'Select', 'sort' and 'subscribe' do not appear in the 8085 mnemonics; they are distractors built on the same initials.
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