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Table of Contents Instruction Codes Registers Buses Design of Computer Instruction Timing and Control Instruction Cycle Memory Reference Instruction Input Output Interrupt Design of Basic Computer Accumulator Logic
Instruction codes What is program- Is the set of Instruction that specifies the operation What is computer Instruction- Is a binary code that specifies a sequence of micro operation for the computer. So an Instruction code is the group of bits that instructs a computer to perform a specific operation
Continued.. Instruction code is divided in to parts: 1st Operation Part- Add/Subtraction/Multiply/shift No of bits in the operation part depends on the total number of operations available in the computer. 2^3=8 2^4=16 2^6=64 The operation code must consist of n bits for 2^n operations