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Sunday, 23 March 2014

What is Op-code and Operands ? ( 8085 microprocessor)

An Op-code is short for " Operational code ".
An Op-code is a single instruction that can be executed by the CPU . In machine language it is a binary or Hexadecimal value such as " B6 " loaded into the instruction register .
In assembly language mnemonic form of an OP-Code is a command such as MOV or ADD or JMP .

for example : MOV , AL , 34h

The OP-Code is the MOV instruction . The Other parts are called Operands .
Operands are manipulated by the OP-Code . In the example , The Operand are the register name " AL " and the value " 34 Hex . "

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