Need Help creating a circuit for multiplication

Thread Starter

joegreentea

Joined Nov 22, 2011
8
Hiii

I was trying to create a multiplication circuit 4 digit by 4 digit two's complement binary number. I was up to the point on the picture attached.
Does it look right? or totally a mess.
Please Help.
Thanks,
 

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Thread Starter

joegreentea

Joined Nov 22, 2011
8
Thanks, Georacer.
I've made the simulation, now that I plugged-in the binary numbers. I think it's multiply unsigned, how to make it able to handle 2's Complement?
I'm guessing for multiplication, it's not like add/sub when it handles 2'c Complement.
 

Georacer

Joined Nov 25, 2009
5,154
I 'll look into it, about the signed multiplication and I 'll come back to you.
 

Thread Starter

joegreentea

Joined Nov 22, 2011
8
I think Multiply is more complicated than sub/add, it needs to partially invert its products and add 1 on the last bit somehow.
 
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