Give the significance of sim and rim instruction, Electrical Engineering

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Give the significance of SIM and RIM instruction available in 8085.

Instruction SIM: Set Interrupt Mask. This is a 1 byte instruction and can be used three dissimilar functions as follows

i)  To set mask for RST 7.5,6.5 AND 5.5 INTERRUPTS.

ii) To reset RST 7.5 Flip Flop.

iii)To execute serial I/O operation.

Instruction RIM: Read Interrupt Mask .this is a 1 byte instruction and can be used for the following three functions.

i)  To read interrupt masks.

ii) To recognize pending interrupts.

iii) To receive serial data.

 


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