Problem set 6 for CSCI 255 -- Spring 2000

• Due: Monday, 20 March, 3:15 pm

You may do this problem set in groups of three. Turn in one assignment for the group. Include the names of all group members.

Problem 1. (3 points)

Design a 3-to-8 decoder using three 2-to-4 decoders. Don't expect to use all decoder inputs in a useful way.

Problem 2. (3 points)

How would you set the M, S₁, and S₀ inputs to the arithmetic-logic unit described in Figures 5.7(a) and 5.8(a) on pages 180 and 181 of the textbook to compute the following functions:

• A + B
• A AND B
• A'

Yes. This problem is as easy as it seems.

Problem 3. (4 points)

Do problem 5.22(b). Assume the comparator inputs are presented a two two-bit numbers.

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