Real mode BIOS routine and Protected Mode

Question

I am doing some OS experiment. Until now, all my code utilized the real mode BIOS interrupt to manipulate hard disk and floppy. But once my code enabled the Protect Mode of the

Answer 1

If you use legacy IDE, all of the hardware will communicate in the same fashion - you don't have to worry about writing custom drivers (though should you get far enough, you will find that even though they all say they follow the same spec, they all have their fun quirks)

http://www.t13.org/ and http://www.t10.org are where you'll find the relevant specs - if you're feeling brave, you could also write a SATA driver - you'll find the AHCI spec on Intel's website (http://www.intel.com/technology/serialata/ahci.htm)