Instruction format

What is instruction format? ,[object Object]

Types of address instructions Three address instructions ,[object Object],[object Object],[object Object]

EVALUATE X=(A+B)*(C+D) ,[object Object],[object Object],[object Object]

Two address instructions ,[object Object],[object Object],[object Object]

EVALUATE X=(A+B)*(C+D) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

One address instructions ,[object Object],[object Object],[object Object],[object Object]

EVALUATE X=(A+B)*(C+D) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Zero address instruction ,[object Object],[object Object]

Zero address instruction ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Store Mult ADD Push D Push C ADD Push B Push A

Addressing Modes ,[object Object]

Well known addressing modes- ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Implied Mode ,[object Object],[object Object],[object Object]

Immediate Addressing ,[object Object],[object Object],[object Object],[object Object],[object Object],Operand (5) opcode

Register Addressing ,[object Object],[object Object],REGISTERS REGISTER ADDRESS R OPCODE OPERAND

Register Indirect Addressing ,[object Object],REGISTERS Memory R 500 REGISTER ADDRESS R OPCODE ADDRESS OF OPERAND(500) OPERAND(72)

Auto Increment or Auto Decrement Mode ,[object Object],399 400 ,[object Object],[object Object],[object Object],R1=400 700 450

RELATIVE ADDRESS MODE ,[object Object],+ Address Effective MEMORY 826 24 8226 826+24 850 Address (24) OPCODE PC (825)

Indexed addressing mode ,[object Object],+ 1020 E.A 1000 20 Memory Rt Rb ADDRESS(20) opcode index register(1000) operand

BASE REGISTER ADDRESSING MODE ,[object Object],Memory + 400 100 E.A 500 Rt Rb ADDRESS opcode REGISTER(400) 42

Instruction format

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Instruction format