Paper format. National Exams, December 2015 — 07-Elec-A4 Digital Systems & Computers. Three hours, closed book, one approved Casio or Sharp calculator. Six questions are printed; five constitute a complete exam — questions 1, 2, 4 and 6 are compulsory at 12 points each, and the candidate chooses either question 3 or question 5, each worth 16 points. A flip-flop excitation table and a sheet of Boolean identities are attached as page 8. 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 (Boolean algebra), Ch. 3 (K-maps, canonical forms, NAND/NOR-only implementation), Ch. 5 (synchronous sequential logic, state tables, Moore vs Mealy), Ch. 6 (registers and counters), Ch. 7 (memory and programmable logic).
- J. F. Wakerly, Digital Design: Principles and Practices, 5th ed. — Ch. 4 (combinational design practices), Ch. 7 (latches, flip-flops and excitation tables), Ch. 8 (counters and state-machine design).
- C. Hamacher, Z. Vranesic, S. Zaky and N. Manjikian, Computer Organization and Embedded Systems, 6th ed. — Ch. 3 (I/O interfacing and address decoding), Ch. 8 (memory system organisation, chip select generation).
- Freescale/Motorola, M68HC11 Reference Manual (rev. 6) — addressing modes, the
ldaa/staa instruction pair and port D bit assignments used in Question 4.
