The system shown in Fig. 7-2 uses a control memory of 1024 words of 32 bits each. The microinstruction has three fields as shown in the diagram. The microoperations field has 16 bits. 

a. How many bits are there in the branch address field and the select field?

b. If there are 16 status bits in the system, how many bits of the branch logic are used to select a status bit? 

c. How many bits are left to select an input for the multiplexers?

Fig. 7-2

Status bits Branch logic MUX select Clock Select a status bit Branch address Instruction code Mapping logic Multiplexers Control address register (CAR) Control memory Microoperations Subroutine register (SBR) Incrementer