negative values

[yoniman]

Hey,
I didn't find where to use the 2's complement that we learned in this chapter.

I saw that in the ALU documentation is written about x+y - "integer 2's complement addition".
What is the meaning of that? is the Add16 required?

thanks, Yoni.

[cadet1620]

Yes, the ALU uses Add16. (Add16 works for unsigned and 2's complement numbers.)

You also need to know about 2's complement representation of numbers to implement the 'ng' status output.

--Mark