Computer Science 281

Fourth Exercise Set

Purpose

• To become more comfortable with data representation, truth tables, and basic circuits

Due:  In class Monday, March 4

Please work problems 4, 5, 6, 7, 9, 10, and 12 on pages 199 - 200 of Tanenbaum

In addition, work out

• The 2's complement representation of -104
• The single precision floating point representation of
  • 25.25
  • -0.125

Answers should be given in hex. You can use the program discussed in class to check your representation of -104. To check your work on the other two problems, write a C program with the following statements

float x;
x = 25.25;
x = -0.125

and examine the assembly language code generated by gcc. It is strongly recommended that you do not use this technique to work the homework exercise, since these are likely exam questions.