Carpinelli's RS-CPU : Arithmetic Unit

Rewrite each operation as the sum of two values and a carry

LDAC5:  AC           0  + BUS  + 0


MOVR1:  AC           0  + BUS  + 0


ADD1 :  AC           AC + BUS  + 0


SUB1 :  AC           AC + BUS' + 1


INAC1:  AC           AC + 0    + 1


CLAC1:  AC           0  + 0    + 0