What are the functions of RIM, SIM, IN?
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Answer Posted / abhi
-->Sim:- set interrupt mask
The masking or unmasking of RST 7.5, RST 6.5 and RST 5.5 interrupts can be performed by moving an 8-bit data to accumulator and then executing SIM instruction.
-->Rim:- Read interrupt mask
Rim checks that weather interrupt mask or not
This works after SIM to check masking
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