22-Elec-A4 Digital Systems and Computers, December 2016: worked solutions

22-Elec-A4 Digital Systems and Computers: December 2016

Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)

Paper format. National Exams, December 2016 — 07-Elec-A4 Digital Systems & Computers. Three hours, closed book, one approved Casio or Sharp calculator. Six questions are printed and any five constitute a complete exam; every question is worth 12 points with the per-part breakdown printed on page 1. A flip-flop excitation table and a sheet of Boolean identities are attached as page 6. All six questions are solved below so the set works as a complete study resource.

Reference texts.

M. M. Mano and M. D. Ciletti, Digital Design, 6th ed. — Ch. 2-3 (Boolean algebra, K-maps, hazards, NAND/NOR-only synthesis), Ch. 5-6 (synchronous sequential logic, state tables, counters), Ch. 7 (memory and programmable logic: PAL/PLA).
J. F. Wakerly, Digital Design: Principles and Practices, 5th ed. — Ch. 4 (hazards and combinational practices), Ch. 7-8 (latches, flip-flops, excitation tables and counter design).
C. Hamacher, Z. Vranesic, S. Zaky and N. Manjikian, Computer Organization and Embedded Systems, 6th ed. — Ch. 3 and Ch. 8 (address decoding, chip-select generation, memory-mapped I/O).