Exercises

  1. What is a half- adder ?

  2. Make a NOT gate using

    1. an XOR gate

    2. a NAND gate

    3. a NOR gate.

  3. Write a software algorithm for the following equation. D=(1(A B)) (A B)

    What does the equation do?

  4. Draw an XOR circuit using only OR gates and AND gates, and a subtraction.

  5. Make a 128-bit XOR using only bitwise OR and bitwise AND, and a subtraction.

  6. Write code to change the value of tri-state data. Note the series of states is a repeating pattern {0, 1, 2, 0, 1, 2, }. The starting state is State #0.

    State

    1

    2

    Value

    0x34

    0x8A

    0xE5

    0x34

Extra credit:

image from book

This cross- coupled SR flip-flop will be more familiar to those of you with electronics experience. Using A=0 and B=0 as the starting state, finish the logic table.

How does this circuit function? What are the behaviors of p and q if the data inputs of A and B are changed to a new state? Try all 12 possibilities. How would you code it?



32.64-Bit 80X86 Assembly Language Architecture
32/64-Bit 80x86 Assembly Language Architecture
ISBN: 1598220020
EAN: 2147483647
Year: 2003
Pages: 191

Similar book on Amazon

flylib.com © 2008-2017.
If you may any questions please contact us: flylib@qtcs.net