The 8085 microprocessor responds to the presence of an interrupt:
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The 8085 microprocessor responds to the presence of an interrupt:
- A.
As soon as the TRAP pin becomes high
- B.
By checking the TRAP pin for high status at the end of each instruction fetch
- C.
By checking the TRAP pin for high status at the end of the execution of each instruction
- D.
By checking the TRAP pin for high status at regular intervals
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Correct answer: C
The 8085 does not respond to an interrupt immediately in the middle of an instruction. It samples interrupt inputs such as TRAP at the end of the execution of the current instruction. If the interrupt is recognized, the processor then starts the interrupt service sequence. Therefore, the correct response is checking the TRAP pin at the end of each instruction execution.