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How many bit vector number is used in an interrupt cycle of 80386?(a) 4(b) 8(c) 16(d) 32The question was posed to me in semester exam.My enquiry is from Features of Intel topic in chapter Embedded Processors of Embedded Systems

Answer»

The correct OPTION is (b) 8

For explanation: While an interrupt cycle is running, the processor possesses two INTERRUPTS to acknowledge bus cycles and reads an 8-bit vector number. This vector is then used to LOCATE, within the vector table and it has the address of the corresponding interrupt service routine. NMI is automatically ASSIGNED as vector number 2.



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