Build a circuit that has two 8-bit two’s complement numbers U and
W as its inputs and a single 1-bit output R, which is 1 when W − U is
negative and 0 otherwise.
You are not allowed to use the Arithmetic and Plexers libraries; how-
ever, an 8-bit adder, incrementer and multiplexer, implemented via gates,
are provided on the design board for your convenience. Feel free to use
them, or build your own if you prefer.

 

We don't provide answers for school work. You need to show your best effort so we can see the approach you're being taught and where you're having difficulties.

What simulator are you using?

 

We don't provide answers for school work. You need to show your best effort so we can see the approach you're being taught and where you're having difficulties.

What simulator are you using?

Logisim

 

Logisim

That's what I thought. I never cared for that simulator.

 

That's what I thought. I never cared for that simulator.

Can you please give me some Idea how can I solve this problem ?

 

Can you please give me some Idea how can I solve this problem ?

If W is 98 and U is -49, what should R be?

How did you arrive at that?

Can you apply that same approach regardless of what W and U happen to be (each between -128 and +127)?

 

Can you please give me some Idea how can I solve this problem ?

You have to show your best effort so we can see what approach you take.

 

You have to show your best effort so we can see what approach you take.

This is what I have done so far... success for a few numbers, still getting errors for some

 

solved it

 

solved it

Glad you solved it. I don't visit this site as often as I have in the past and choose not to have email notifications cluttering my inbox.