What will be the bit format of command byte A in 82C55A PPI for these arrangement, (i) Mode 0, Port A as input, port B and port C as output. (ii) Mode 1, port A as output, port B as input.

(i) Required Bit Format of command byte A: 

          So the bit format will be 10010000.

          (ii) Required Bit Format of command byte A: 

So the bit format will be 1010×11×.

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Author: Tanmay Chakrabarty

A former CSE student, working as a SSE with 5+ years of experience in the field of Web Application development in PHP+MySQL platform with strong skills in JS, JQuery(+UI), HTML, CSS, Bootstrap.