Step by Step: Windows XP on Mac?
* Macintosh uses a different MBR
* MacBooks use EFI, XP x86 uses BIOS
* The modified Darwin Bootloader is made for EFI w/ EFI supporting operating systems
OK… So step by step.
Where is the BIOS used? For what? How?
The OS sends low-level calls to the BIOS that tell it exactly how to deal with the hardware. Now I don’t have the Windows XP source code at hand.. so all I can tell you for a fact is that NTLDR uses it to access the drive at first to boot Windows, and Windows uses it at *least* once more when it is mounting the drives. Windows XP on Mac? at Ramblings of a Computer Guru
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