Operational System Project

About the project

This repository was created to develop a university work on Operational Systems. It was developed:

some programs with low-level instructions
- the programs are defined in Programs.java and the 'pc' is one incompleted program
interruptions
- you can find the interruptions created on Interruptions.java
system calls
- in this part, it was implemented the TRAP instruction
memory manager
- this memory manager implements memory pagination
process manager
- the process has three states: running, ready, or blocked (by IO request)
scheduler
- the process is scheduled by a number of instructions, each process run 7 instructions then schedule with other
IO
- when a process needs an IO input, for example, the process is blocked until the user provides the input

You can find more information about the project in the folder "guidelines" in this repository.

Requirements

Java

Running the project

First, you need compile the project using:

cd src
javac Main.java

After, run the project with:

java Main

Then, you will see some instructions to exec or deallocate a process, dump the memory, and exit. If you exec some process, you will see on the terminal the instructions running and the scheduler happening.

Observations

This project has some bugs, but the main features are implemented and functional.