Question

Program to mask rst 6.5 & rst 5.5 & enable rst 7.5 interrupts

Answer 1

Answer:

Set Interrupt Mask (SIM) – It is used to implement the hardware interrupts (RST 7.5, RST 6.5, RST 5.5) by setting various bits to form masks or generate output data via the Serial Output Data (SOD) line. First the required value is loaded in accumulator then SIM will take the bit pattern from it.