I am trying to make a 5-bit add/subtract schematic.
If C-in is 1 it subtracts and adds C-in to make the negative number.
How do I make one 5-bit number (B) invert when I chose 1 as C-in?


C-in(add 0/1 subtract)
|
|

B(0/1) ------- [if C-in is 0, no inversion] (0/1)
--|>-- [if C-in is 1, invert] (1/0)


I believe I figured it out, I need a Bus Buffer Gate.
Ehh... no, a Bus Buffer gives either same output or disabled.