ceilingwalker
Lifetime Supporting Member
It's a dedicated bit. In the HX, that's bit 255.04, or P_CY if you use the default symbol name. EDIT: @gtsuport beat me to it.
As AustralIan alluded to, the ADD function adds the two numbers (augend and addend) and the carry.
I was always taught that for multiword numbers, use an 'add without carry' on the first set (lowest significant word), and 'add with carry' on the rest. In your case, the CLC placement follows that, because these processors don't have a separate add function for with/without carry.
What's throwing me is the actual carry. What is carrying and where? How is it affecting the actual register?