Problem 21 Suppose the control memory in Fig 72 has 4096 wor

[Problem 21 Suppose the control memory in Fig. 7-2 has 4096 words of 32 bits each. The microinstruction has three fields as shown in the diagram. The microoperations field has 12 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 ofthe branch logic are used to select a status bit? c) How many bits are left to select an input for the multiplexers?

Solution

1. 3 bits for the branch address field.

2. 1 bit used for status

3.8 bits for input of the multiplexer