This is a simulation project, simulating how an operating system works in C++. The project is divided into three phases.

PHASE I More info...

Create the assembler. Create the virtual machine. Create the OS that runs an instance of the assembler and sends it to the virtual machine. Test the virtual machine with the factorial program. Phase II More info...

Simulate the CPU running multiple programs . Add three queues in OS, waiting queue and ready queue. Simulate loading memory with all programs available in the current directory. Add context switching in OS. Implement a file to store each processes stack before context switch. Append accounting information of OS at the end of every programs output file. PHASE III More info...

Add memory management layer to OS. Implement demand-paging. Fix the page size to be 16 words. Use two page replacement algorithms, FIFO and LRU. Add page fault and Hit-Ration to accounting information. Add PCB's to manage programs. Add page tables for each process. Implement in OS the inverted page table. This Phase is not complete, there are some bugs in the FIFO, LRU alg.
To CompileTo compile the source code:

Download, extract and then navigate to the code's directory and type "make"