*Right shift.The switching circuits in the arithmetic unit are arranged so that the least significant digit of the register
C is placed in the most significant place of register B during right shift micro-operations, and the most significant
digit of register C (sign digit) is repeated (thus making the correction for negative numbers).
†Left shift.The switching circuits are similarly arranged to pass the most significant digit of register B to the least
significant place of register C during left shift micro-operations.