FOS-Operating-System

Configuration

To set up your project, follow these steps after download and extract fos_cygwin.rar and open it by vs code:

1. Place fos_cygwin directly in C:/.
2. Click on RunVSCode.bat.
3. Press Ctrl+Shift+P, select "Run Tasks" and choose either "Run FOS" or "Run FOS-qemu".

Running FOS on Linux

To run FOS on Linux, download fos_cygwin.rar and navigate to the fos_linux directory for configuration options.

Features

• Implemented command prompt functions for user interaction.
• Developed system calls: OS procedures that execute privileged instructions.
• Built a dynamic memory allocator with first-fit and best-fit allocation strategies.
• Created a kernel heap with initialization, allocation, deallocation, and address translation functions.
• Implemented a fault handler to manage invalid memory accesses, including page fault handling and environment workspace list management.
• Designed a user heap with initialization, allocation, and deallocation functions.
• Enhanced the fault handler with FIFO and approximate LRU replacement algorithms.
• Developed a BSD scheduler with process priority control, initialization, scheduling, and clock interrupt handling functions.