Question

The signals S1 (active low), S2 (active low) are

(a) output signals

(b) indicate initiation of bus cycle

(c) define type of bus cycle with M/IO (active low)

(d) all of the mentioned

I got this question during an interview.

I need to ask this question from Signal Descriptions of 80286 in chapter 80286-80287-A Microprocessor with Memory Management and Protection of Microprocessor

Answer 1

Right option is (d) all of the mentioned

The best I can explain: The signals S1 (active low), S2 (active low) are active low status output signals, which indicate initiation of a bus cycle, and with M/IO (active low) and COD/INTA (active low), they define the type of the bus cycle.