A half-subtractor lets you borrow out, but not borrow in. A full subtractor is made by combining two half-subtractor and adding an OR-gate. (lets you both BOR_in as well)
asdfghjkl;' s-sum and c'-carry see for half adder s=a(xor)b and c'=ab for full adder s=a(xor)b(xor)c and c=ab+bc+ac or ab+c(a(xor)b) we can convert two half adder to full adder with help of and or...
The 1 bit full adder has three inputs, A, B, and CarryIn. It has two outputs, Result and CarryOut.
To connect multiple 1 bit full adders together, bus the A and B inputs into their respective buses,...