Machine Control Instructions | 8085 Microprocessor

1. NOP   no operand

Instruction word size  ⇒   1 Byte

Operation ⇒ When this instruction will execute microprocessor will not perform any task.

It is used for the creation of delay.

Addressing Mode ⇒ Implicit Addressing Mode

 

2. HLT   no operand

Instruction word size  ⇒   1 Byte

Operation ⇒ When this instruction will execute further increment of the program counter (PC) will stop. It means after the execution of HLT instruction, execution of the program will terminate.

Addressing Mode ⇒ Implicit Addressing Mode

Note: All above instructions are data transfer instructions, so the status of the flag will not affect.

 

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