Example $-2$

A microprocessor has an instruction set that consists of $127$ instructions, where each instruction consists of opcode and two operands $-$ each operand is $16$ bits. Each instruction needs fetch, decode, read operand, execute, write and interrupt stages. Assume that as an average, each stage requires two micro$-$operations to complete. Also, assume that the control memory is $N$ bits wide $($i$.$e$.,$ control field bits $+$ address selection field bits $+$ address $1$ bits $+$ address $2$ bits $=N$ bits$).$ The control field bits are $12,$ and there are $6$ flags to be monitored.

How many bits are needed in the address $1$ and address $2$ field?

What is the size of control buffer register?

What is the size of control address register?

What is the size of control memory, in bits?

What is the size of instruction register?

In order to change this to single$-$address format, what parameter is to be changed, and how?

$15$