machine control instructions in coa
Answer (1)
2nd Sep, 2021
These type of instructions control machine functions such as Halt, Interrupt, or do nothing. This type of instructions alters the different type of operations executed in the processor.
They are used when no operation is performed. No flags are affected during the execution of NOP. The instruction is used to fill in time delay or to delete and insert instructions while troubleshooting.
Disable interrupt is used when the execution of a code sequence cannot be interrupted. For example, in critical time delays, this instruction is used at the beginning of the code and the interrupts are enabled at the end of the code. The 8085 TRAP cannot be disabled.
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