In computers we use two's-complement to subtract and it works well, but how does it work for subtraction without two's-complement when subtracting a larger number from a smaller number?
0x0F - 0x13 ------ -1C
Doesn't seem to work like subtracting decimal numbers would.
01 - 11 ---- -10
It works if I flip the numbers.
0x13 - 0x0F ------ -4
What am I missing?