This assignment is due 9 November.
Do the problem 4.23 from the textbook.
Do the problem 5.12 from the textbook.
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 -- Cn | 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 |
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.