BrokenThorn Entertainment

Thanks for your help, keep up the good word!

Hello, is it necessary to install processor exceptions(with interrupt number 0-31) while installing IDT? Thanks.

Thanks for the response, it just didn't cross my mind.

I would like to ask why do we have to(or choose to) compile kernel with pe or elf formats and we don't just compile it as flat binary format(pure binary). What are the steps required to compile and load kernel as elf format?

Hi, I am confused at the point where we set registers as soon as we into protected mode. Especially when setting stack-segment with the same selector as data-segment. This means that they will have the same base-limit address. My question is this: Stack,data and code won't 'interfere' with each othe...

Thanks a lot! Really helpful!

Hi, Thanks again for your valuable help. If the OS wants to give control to a program(and needs to go to user-mode), once program finishes its execution and want to give control back to OS, how will OS go to ring-0 since it can't go from ring-3 to ring-0? Is 'jmp 0x8:Stage2' the same with the follow...

RPL is only for ds?How do we initially set CPL?

Hi, thanks for the response but i still have a couple of questions. In number 0x10(0000000000010 0 00) index is 10(2), so null-descriptor is at index 0 and code-descriptor is at index 1? In addition 0x8 and 0x10 are not what they are because they are equal to the bytes from the start of the GDT, but...

Hello, i have some questions about selectors. First of all i found that a selector(segment register) contains a 13-bit index,1-bit identification for GDT/LDT and 2-bits for protection level. After we entered protected mode and jump to Stage3, we loaded only descriptor index(0x10) in segments. Why we...

Thanks for your help, here is the code:

xor ax, ax
mov ds, ax
mov es, ax

Hello i don't understand why we need to disable interrupts(with cli), i thought using hlt(to halt the cpu would be enough). In addition why do we need to null ds and es?

Thank you very much for your time.I didn't provide more information because i didn't use Bochs (instead i 'm using VirtualBox).I installed it and boot from the floppy (the one where the boot loader and and second stage file are locatedn) but Bochs just hung up without even printing any info in the l...

Problem not fixed yet.

The problem is that it doesn't load and execute stage 2 bootloader.