MyOS: A Basic Custom Operating System

MyOS is a simple operating system built from scratch using Assembly. It provides a command prompt where users can enter a variety of supported commands, listed below.

Demo Video:

Upon starting the OS, an animation is displayed. The same animation can also be shown by executing the draw command. To reboot the system, use the reboot command.

Supported Commands:

• about - Information about MyOS

• help - List of available commands

• clear - Clears the screen

• reboot - Reboots the system

• ascii - Displays the ASCII table

• beep - Produces a beep sound

• writeflp head,track,sector,drive|size: - Writes text data to the floppy disk (the same disk from which the OS is loaded)

• readflp head,track,sector,drive|size: - Reads text data from the floppy disk

Parameters for writeflp and readflp commands:

• head - {1, 2}
• track - [0-79]
• sector - [1-18]
• drive - {0, 1}
• size - Number of bytes to read/write (must be <= 6000)

head,track,sector,drive indicate the location on the floppy disk to read/write data.

• chrono - Counts seconds
• fib n - Calculates and displays the first n Fibonacci numbers
• draw - Displays an animated UTM (press Enter to stop the animation)

Compilation

Range 1791-1840

The compile script contains all the commands necessary to compile and build:

• loader.com from loader.asm
• wellcome.com from wellcome.asm
• kernel.com from kernel.asm

And it also contains the command that is necessary to create the bootable image from the .com files mentioned above, with the help of appender3 script.

The compile file is a shell script. To do it's work run ./compile (or: bash compile).

To build the source code it is required to have installed:

• NASM version 2.14
• bash shell
• truncate