Homework 7 for CSCI 255, ENGR 274, ECE 212

This assignment is due 9 November.

Problem 1

Do the problem 4.23 from the textbook.

Problem 2

Do the problem 5.12 from the textbook.

Problem 3

For each of the following inputs to the 74181 ALU (Figure 5.25 on page 263), what outputs are computed?

Selection -- S₃, S₂, S₁, S₀	Mode -- M	Carry in -- C_n	A -- A₃, A₂, A₁, A₀	B -- B₃, B₂, B₁, B₀
0000	1	0	1100	0101
0110	0	1	1100	0001
1101	0	1	1010	1011
1100	1	0	0000	1101
0101	1	0	1010	0110

Problem 4

Start with the R-S latch show in Figure 6.5 on page 286. Replace the NOR gates with NAND gates. Now recreate the timing waveform shown in Figure 6.6, but with the new circuit.