The Place to Start for Operating System Developers
http://f.osdev.org/
Heheh, welcome in the wonderful world of real mode x86 programming :). Just a tip: I'd use ES, not DS, to point to external structs like that. That avoids the problems you encountered.zaleschiemilgabriel wrote:To go through the list, I set the DS to the segment in that pointer. This segment didn't match my data segment, so when I tried to display text from my data segment using int 10h 0Eh, it wouldn't work.
You're welcome. The only 'ligit' reason for changing DS is when you want to do a stos or movs or the like outside your normal data segment, where it is a requirement to use ds. In all other cases ds should stay the same (and yes, of course there are many exceptions thinkable, but as long as you keep your local stuf within 64Kb, DS better just stays what it is).zaleschiemilgabriel wrote:Thanks for the tip! I'm changing my code right now.
That's wrong.GRUB leaves me in real mode
I load my partition boot sector using chain-loading. Then from the boot sector I load the kernel where I set PM. Either GRUB loads my boot sector in RM or in some kind of VM that feels like RM. I don't really care as long as my segments work as they do in RM!Wave wrote:That's wrong.GRUB leaves me in real mode
This means Grub does exaclty nothing, as it makes the chainloaded bootloader think it was the first to start (the only way to have a multiboot Windows). You could as well skip Grub alltogether.zaleschiemilgabriel wrote:I load my partition boot sector using chain-loading.
You're right, that's my intention, but I still need GRUB to boot other operating systems.jal wrote: This means Grub does exaclty nothing, as it makes the chainloaded bootloader think it was the first to start (the only way to have a multiboot Windows). You could as well skip Grub alltogether.
