Macros and Procedures in 8086 - Computer Organization and Architecture

TL;DR

Learn about the difference between procedures and macros in 8086 and how they are executed in programs.

Transcript

hello everyone in this session we will understand about the procedures and macros in 8086 and we'll also understand the difference between procedures and macros in 8086 let us understand this now let us understand that you are a programmer being a programmer you know that if you want to write a program you need to fit every instruction in a specifi... Read More

Key Insights

• ❓ Procedures and macros are used in 8086 programming to organize instructions into functions.
• 🤙 When calling a procedure, the control is transferred to its memory location, and after execution, it returns to the previous instruction.
• ↩️ Macros are smaller functions that are placed right after the call instruction and do not require a call or return.
• 🤙 Procedures require more time to execute due to the control transfer, while macros execute immediately after being called.
• 🥇 Macros need to be placed for each call, increasing the length of the program.
• 🛟 Procedures and macros serve different purposes and have different advantages depending on the specific requirements of a program.
• 👨‍💻 Using procedures or macros depends on the size and complexity of the code and the need for speed or code length optimization.

Questions & Answers

Q: What is the difference between procedures and macros?

Procedures are larger functions that are loaded into a specific location in memory and require a call and return, while macros are smaller functions that are placed right after the call instruction and do not require a call or return.

Q: How are procedures executed in 8086?

When a procedure is called, the control is transferred to its memory location. After execution, the control returns to the previous instruction, which was suspended during the function call.

Q: How are macros executed in 8086?

Macros are placed right after the call instruction and are executed immediately after being called. There is no call or return involved in executing macros.

Q: What is the advantage of using macros instead of procedures?

Macros are smaller and do not require a call or return, so they execute faster. However, when a macro is used multiple times, it needs to be placed for each call, increasing the length of the program.

Summary & Key Takeaways

• Procedures and macros are used in programming to organize instructions into functions.

• When calling a procedure in 8086, the control is transferred to the function's memory location and then returned to the previous instruction after execution.

• Macros, on the other hand, are smaller functions that are placed right after the call instruction and do not require a call or return.