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When non-specific EOI command is issued to 8259A it will automatically

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in Microprocessor by (39.4k points)
When non-specific EOI command is issued to 8259A it will automatically

(a) set the ISR

(b) reset the ISR

(c) set the INTR

(d) reset the INTR

I had been asked this question in an internship interview.

This interesting question is from Programmable Interrupt Controller 8259A topic in section Special Purpose Programmable Peripheral devices and their Interfacing of Microprocessor

1 Answer

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by (49.2k points)
Correct option is (b) reset the ISR

Best explanation: When non-specific EOI command is issued to 8259A it will automatically reset the highest ISR.

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