System-R

A learning and just for fun computer system emulator project inspired by nemu.

We aim to implement almost everything in a computer system, including CPU, Memory, IO, OS, Compiler etc.

Architecture

+-----------------+   +-----------------+   +-----------------+
|                 |   |                 |   |                 |
|   Application   |   |   Application   |   |   Application   |
|    compiler     |   |                 |   |                 |
+-----------------+   +-----------------+   +-----------------+
|                 |   |                 |   |                 |
|      ABI        |   |      ABI        |   |     ABI         |
|    syscall      |   |     syscall     |   |    syscall      |
+-------------------------------------------------------------+   
|                                                             |
|                      Operating System                       |
|                           ROS                               |
+-------------------------------------------------------------+
|                                                             |
|                      Abstract Machine                       |
|                           RAM                               |
+-------------------------------------------------------------+
|                                                             |
|                    (CPU, IO, Memory)                        |
|                          REMU                               |
+-------------------------------------------------------------+

See details in README.md in each directory.

Abstract Machine Example

A simple typing game:

make play # sdl is required

OS Example

A simple OS run on REMU based on RAM:

make run