Logisim exercise

Thread Starter

ValentinNiculae

Joined Dec 1, 2022
3
Hi all,
Can anyone help me with the below exercise ?
I have to "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." In logisim
Thank you
 

WBahn

Joined Mar 31, 2012
29,850
Hi,
This is what I have done so far 8-bit incrementer subcircuit, 8-bit subcircuit adder, 8 subcircuit bit mux , the problem is if W-U is negative output should be 1 or otherwise 0 I cant think of anything elce to solve this please see attacher logisim file
How can you subtract one two's complement number from another number using an adder?
 

KAlex610

Joined Apr 9, 2023
6
Hi,
This is what I have done so far 8-bit incrementer subcircuit, 8-bit subcircuit adder, 8 subcircuit bit mux , the problem is if W-U is negative output should be 1 or otherwise 0 I cant think of anything elce to solve this please see attacher logisim file
Did you solve it ??
 
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