Main memory and its Basic Hardware

TL;DR

Main memory is essential for computer operation, and hardware aspects like base and limit registers provide protection and efficient execution.

Transcript

click the Bell icon to get latest videos from equator hello friends today we will known about what is main memory and what are the memory aspects related to main memory and what is a basic hardware that we can apply to get a better and reliable main memory as we know as a result of the CPU scheduling we can improve the CPU utilization and both the ... Read More

Key Insights

• 💨 Main memory is essential for CPU instruction execution and result storage, while cache provides faster access.
• 👾 Base and limit registers ensure memory protection by restricting access to legal addresses within process spaces.
• 👻 Hardware, rather than the operating system, manages memory access, allowing for efficient execution.
• 👾 The operating system executes in kernel mode, providing exclusive access to both operating system and user memory space.

Questions & Answers

Q: What is the role of main memory in a computer system?

Main memory is central to computer operation, storing instructions and data that are accessed by the CPU. It allows processes to be executed and results to be stored.

Q: How does the CPU interact with the main memory?

The CPU fetches instructions from the main memory, loads them into the instruction register, and operates on them. Operands may also be fetched from memory. The result is then stored back into memory.

Q: Why is a faster memory like cache needed between the CPU and main memory?

Main memory access via the memory bus can be slow, causing stalls. Cache, built into the CPU, provides faster access to frequently used data, improving performance without intervention from the operating system.

Q: How does hardware provide protection for memory access?

Hardware implements protection by using base and limit registers. Each process is allocated a separate address space, and only legal addresses within that space can be accessed. Any violation traps an error to the operating system.

Summary & Key Takeaways

• Main memory is crucial for the execution of processes and instructions in a computer system.

• The CPU fetches instructions from the main memory and operates on them, storing the result back into memory.

• To improve performance, a faster memory called cache is built into the CPU, and hardware aspects like base and limit registers provide memory protection.