Instructions

Question

Answer 1

Here the case is like MODE bit is one only as it indicate the Indirect mode 

MODE -1bit

OPCODE-?

REGISTER OPERAND require 7 bits (128 registers are there)

MEMORY OPERAND require 28 bits

Now total length of INSTRUCTION is 40 

so total bits for OPCODE= 40-28-7-1=4 bits ..

So total operations possible are 2^4 = 16

Comments

This bits are fixed??

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no ..its a defined at the time of creation of INSTRUCTION set

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How wo can define indirect mode bit for this question