Math Logic

Post by **Nach** » Mon May 19, 2008 12:49 am

Anyone know what the left most logic gate is? Or perhaps have a full understanding of the algorithm?

I can't find the diagram that comes after this one

blargg · Post by **blargg** » Mon May 19, 2008 1:41 am

Looks like an arithmetic logic unit (ALU).

Bent · Post by **Bent** » Mon May 19, 2008 3:30 pm

Yah, ALU. Lot more than just a logic gate.

LobStar · Post by **LobStar** » Mon May 19, 2008 6:01 pm

To me, it looks like it is supposed to be an adder of some sort... Check here to see a half adder:
http://www.cs.cmu.edu/~ref/pgss/lecture/11/haddr00.gif

You link 2 half adders together to get a full adder.

Here is a full adder:

http://www.cs.cmu.edu/~ref/pgss/lecture/11/faddr000.gif

You link these together for how ever many bits you want to add in a chain, and thats called a ripple carry adder.

I could be completely wrong, but at least its a start for you

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