FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -In computing, an opcode (abbreviated from operation code, also known as instruction machine code, instruction code, instruction syllable, instruction parcel or opstring) is the portion of a machine language instruction that specifies the operation to be performed.

Detailed explanation-2: -The opcode is the machinecode representation of the instruction mnemonic. Several related instructions can have the same opcode. The opcode field is 6 bits long (bit 26 to bit 31). The numeric representations of the source registers and the destination register.

Detailed explanation-3: -An opcode identifies which basic computer operation in the instruction set is to be performed. It is used when writing machine code. It tells the computer to do something. Each machine language instruction typically has both an opcode and operands.

Detailed explanation-4: -An operand specifies a “target address” to be accessed in performing the operation.

Detailed explanation-5: -Each computer has its specific group of instructions. They can be categorized into two elements as Operation codes (Opcodes) and Address. Opcodes specify the operation for specific instructions. An address determines the registers or the areas that can be used for that operation.