Question

What do the contents of instruction register specify?

Answer 1

i donot know the answer .sorry

Answer 2

EXPLANATION:

• The IR in simple microprocessor has simple register with necessary bits for the opcode and the address combined.

• If the opcode and the address requires 8 bits each, then the IR requires 16 (8+8) bits wide. It has both the clock and reset signals.

• The current value can be read by using Program Counter (PC) or ‘Memory Address Register’ (MAR).  

This IR has 2 control signals, they are:

         - Command for loading IR

         - Required address for system bus.  

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