The first two transfers above require addition to the PC of:Address Offset = Extended IR(8:6) || IR(2:0) The third transfer requires that the PC be loaded with: Jump Address=Bus A=R[SA] The counting function of the PC requires addition to the PC of 1 Branch Control determines the PC transfers based on five of its inputs defined as follows: N,Z – negative and zero status bits PL – load enable for the PC JB – Jump/Branch select: If JB = 1, Jump (JMP), else Branch BC – Branch Condition select: If BC = 1, branch for N=1(BRN), else branch for Z=1 (BRZ).