MichalOS

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A simple 16-bit OS based on MikeOS 4.5 with many enhancements.

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# Moved over to [Codeberg](https://codeberg.org/prochazkaml/MichalOS).

---

# MichalOS

A 16-bit keyboard controlled operating system based on MikeOS 4.5, aimed to be more advanced and lightweight on the inside, but simple and easy to use on the outside.

## New features

- Many applications/kernel API calls have been improved/rewritten (both in UI and under the hood) + many new custom applications
- Customizable user interface (custom background, window colors, selectable font, screensaver etc.)
- On-screen clock with timezone support
- AdLib synthesizer support (including primitive PWM emulation via PC speaker) - music file player included (as well as a bunch of example files)
- Lots of new kernel API calls
  - ZX7 decompression
  - flexible UI elements with keyboard input callbacks
  - VGA graphics drawing functions (lines, boxes, polygons, circles)
  - interrupt handling (including a friendly timer interrupt handler)
  - math functions
  - sound abstraction layer (for both PC speaker and the AdLib)
- Loading of compressed applications (ZX7 compressed)
- Certain kernel modules are decompressed at runtime, saving precious memory (also ZX7 compressed)
- System-wide keyboard shortcuts
- etc.

Please check out the [gallery](https://github.com/prochazkaml/MichalOS/blob/master/misc/gallery.md) to see the words above in action.

## System requirements

- Intel 80386 or higher, Pentium recommended
- At least 128-ish kB RAM, 256 kB recommended
- A VGA video card
- A keyboard

## Screenshots

![Login screen](https://user-images.githubusercontent.com/41787099/128972820-d9d31c96-0e88-4fcb-b216-772a4f0d1568.png)
![Desktop](https://user-images.githubusercontent.com/41787099/128972823-3aae09a0-7684-4dc7-a195-92c6e2fb33d7.png)

More screenshots are available in the [gallery](https://github.com/prochazkaml/MichalOS/blob/master/misc/gallery.md).

## Building instructions

For building the OS, a Unix-based system is required (Linux, BSD, WSL, macOS) with **NASM**, **mtools**, **Python 3** and **make** installed. **DOSBox** is required for testing MichalOS builds (QEMU, [VirtualBox](https://github.com/prochazkaml/MichalOS/blob/master/misc/VirtualBox.md), VMware etc. could also be used, but you will be met with limited functionality). **mkisofs** is needed only if you want to generate an ISO image for CDs by running ```make iso```.

On Debian GNU/Linux (and its derivates, such as Linux Mint or Ubuntu), these requirements can be met by running ```sudo apt-get install nasm mtools make dosbox python3```.

On macOS, first install [Homebrew](https://brew.sh/) and then run ```brew install nasm mtools dosbox python``` from the Terminal.

Then, you can simply build the image by running ```make```.

MichalOS

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