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,

 

What does the small square stand for? Is it a full adder?

 

Yes, it is a Full Adder.

 

I 'd say it's correct. Do you need to simulate it?

 

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.

 

I 'll look into it, about the signed multiplication and I 'll come back to you.

 

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