Question by Abo: Deriving an equations from a logic diagram “Logic and Computer Design Fundamentals 1″?
Refer to the logic diagram opposite and derive an equation
for each of the four circuit outputs x, y, z, and w.

Here is the diagram :

http://img64.imageshack.us/img64/1779/hw3j.png

Best answer:

Answer by Roger
z = not D
y = (D)(C) + (not C)(not D) y is an exclusive NOR
x = (B)(not C)(not D) + (not B)(C)(D)
w = A + (B)(C)(D)

Give your answer to this question below!

I installed a software that let me use the PC as an oscilloscope , but
it does not mention how to connect the circuits to be tested with the computer an through which port.Does anyone lead me?
I mean how can I connect that cable to
the circuit ?