Table of Contents
- 1 What are the processor control instructions?
- 2 What are control instructions in 8085?
- 3 What is types of instruction?
- 4 Is an example of processor control instruction?
- 5 What is control instructions in microprocessor?
- 6 How are process control instructions used in a processor?
- 7 What are the instructions in the central processing unit?
What are the processor control instructions?
Processor Control Instructions
- STC − Used to set carry flag CF to 1.
- CLC − Used to clear/reset carry flag CF to 0.
- CMC − Used to put complement at the state of carry flag CF.
- STD − Used to set the direction flag DF to 1.
- CLD − Used to clear/reset the direction flag DF to 0.
What are control instructions?
Types of Program Control Instructions
- Program Control Instructions are the machine code that are used by machine or in assembly language by user to command the processor act accordingly.
- Types of Program Control Instructions:
- Compare Instruction:
- Unconditional Branch Instruction:
- Conditional Branch Instruction:
What are control instructions in 8085?
Microprocessor – 8085 Control Instructions
| Opcode | Operand | Meaning |
|---|---|---|
| HLT | None | Halt and enter wait state |
| DI | None | Disable interrupts |
| EI | None | Enable interrupts |
| RIM | None | Read interrupt mask |
What are control instructions in C?
Control Instructions in C. Program is a set of instructions. We know that each instruction of the program is executed by processor. Processor executes instructions one by one.
What is types of instruction?
The instruction types include load and store with reservation, synchronization, and enforce in-order execution of I/O. They are especially useful for multiprocessing. Flow Control Instructions – These include branch, Condition-Register logical, trap, and other instructions that affect the instruction flow.
What are the different types of instructions used in a program?
A computer must have the following types of instructions:
- Data transfer instructions.
- Data manipulation instructions.
- Program sequencing and control instructions.
- Input and output instructions.
Is an example of processor control instruction?
These instructions are used to control the processor action by setting/resetting the flag values. These are the process/processor control instructions….Process control instructions in 8086 microprocessor.
| Opcode | Operand | Description |
|---|---|---|
| CLD | —- | Used to clear/reset the direction flag DF to 0 |
| STI | —- | Used to set the interrupt enable flag to 1, i.e., enable INTR input. |
What is an example of control instruction?
For example, we want to execute first line of our program, then second and third line but after executing third line, we may want to skip fourth line and jump to the fifth line. In such situations, we use control instructions. Control instruction gives power to decide the flow of the program.
What is control instructions in microprocessor?
Microprocessor 8085 Control Instructions – Microprocessor No operation is performed, i.e., the instruction is fetched and decoded. This instruction is used to read the status of interrupts 7.5, 6.5, 5.5 and read serial data input bit.
What are four types of control instructions?
(d) Case Control Instruction.
- Sequence Control Instruction: The Sequence control instruction ensures that the instructions are executed in the same order in which they appear in the program.
- Decision Control Instruction:
- Loop Control Instruction:
- Case Control Instruction:
How are process control instructions used in a processor?
These instructions are used to control the processor action by setting/resetting the flag values. These are the process/processor control instructions. Used to put complement at the state of carry flag CY. Used to set the interrupt enable flag to 1, i.e., enable INTR input. Used to clear the interrupt enable flag to 0, i.e., disable INTR input.
What are the process control instructions in the 8086?
Process control instructions in 8086 microprocessor. Last Updated : 22 May, 2018. Process control instructions are the instructions which control the processor’s action by setting (1) or resetting (0) the values of flag registers. Following is the table showing the list of process control instructions:
What are the instructions in the central processing unit?
Central Processing Unit (CPU) instructions set The general-purpose instructions perform basic data movement, arithmetic, logic, program flow, and string operations which programmers commonly use to write application and system software to run on Intel 64 and IA-32 processors.
What are the different types of machine control instructions?
This type of instructions alters the different type of operations executed in the processor. Following are the type of Machine control instructions: 1. NOP (No operation) 2. HLT (Halt) 3. DI (Disable interrupts) 4. EI (Enable interrupts) 5. SIM (Set interrupt mask) 6. RIM (Reset interrupt mask)