I'd like to make a software which will be executed with BIOS

user_12420001 0
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I have a little brother who spends his time playing online games. It makes my parent worried. So, I'd like to build a blocking software which will be executed right after booting process.

My program will do

  1. Print out questions(related to physics, literature and math), and ask him to type a right answer.
  2. If he gives right answer, let him proceed to log in his laptop.
  3. If he fails system will be shut down automatically.

So, my question is what should I know in order to accomplish my plan. Or any books to recommend me?

At my University, I 'd been taught only Java and C++ until now. Through this project, I want to push myself to learn more and do actual practical tasks.

bios bootloader operating-system x86
1 Answers

You could write your own bootloader, or you could modify an existing open-source bootloader like GRUB that already has code for printing menus.

You might just make a menu where the prompt is a question and the options (instead of being different things to boot) are just GRUB print commands or shutdown, except for the right answer which goes to the next menu. If your sibling doesn't find the keystrokes to escape from GRUB's menus to its command-line, or doesn't know what to do with it to boot successfully, that could be useful.

To update with (a) new question(s), you can have that done by a program that runs after the OS boots, so you don't have to figure out how to do that with GRUB's command / config language. (Although that might be possible if you can use the low digit of the current time as an index into something.)

I think GRUB can work as a UEFI bootloader, so you don't have to set your PC's firmware to boot in legacy BIOS mode. ("compatibility support modules", aka CSM in the BIOS menu.)

user_2241320
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