How c++ can be used to make very simple OS ?

[GbRGwA7f]

Hello, I want to make very simple OS that just shows a red screen, shut down with a key. If I am not wrong I can use OpenGL to render graphics for my OS.

Is that possible to do it ?
Which things should I need to do to install it like windows ?

[dutch]

https://www.google.com/search?q=build+your+own+os

[fiji885]

You want to make a "simple" OS? Well... The words "simple" and "OS" does not go well together. You have created such a question where you have juxtaposed the words Simple and OS. To create an OS, you need so many things. I wouldn't dare call any OS simple. Any OS is very complex and difficult to make.

[GbRGwA7f]

Alright then I made a bootable device, simple boot.asm (compiled as BIN) and I thing simple OS means this for me. Now, can I call c++ code inside asm file and continue with c++ ?


SOURCE: https://blog.ghaiklor.com/how-to-implement-your-own-hello-world-boot-loader-c0210ef5e74b

[helios]

That's a bootloader, not an OS. You don't have an interrupt handler, you can't allocate memory, you can't create processes or threads, you can't use I/O devices, ...

So, yes, within those constraints you could run some very rudimentary C++ code, and if all you want to do is do some processing and not be able to take any input from anywhere nor output any results, I suppose you can do that.

[GbRGwA7f]

I know it now thanks to you. Can I make an interrupt handler in C++ ? If I should do it in Assembly, What can be a good start point ?

[helios]

https://wiki.osdev.org/Expanded_Main_Page

[Ganado]

A bit off-topic, but if you ever do make something noteworthy, be sure to talk about it in the Lounge :) This OS stuff is well over my head, but does seem interesting so good luck.

I will say, getting your OS/custom windowing system to interact with a graphics card to set up a proper context for OpenGL is probably really difficult to do from scratch, but I'm sure it's possible.