Anonymous user
Rolling Your Own Bootloader: Difference between revisions
→How do i actually load bytes
| [unchecked revision] | [unchecked revision] |
Line 55:
Taken to the extreme, boot managers like that can become as complex as a simple OS (much like GRUB is, which offers reading from various filesystems, booting Multiboot kernels, chainloading, loading initrd ramdisks etc. etc. - such internals will not be addressed here.
=== How do
[[BIOS]] interrupt 13h. Get info about it at [[Ralf Brown's Interrupt List]], make sure you know floppies may fail one or two times, that you cannot read more than a track at once, and you're done. To read from the hard drive, you probably want int 13h, ah=0x42, drive number 80. Details in the interrupt list.
If you need guidance, feel free to check [http://clicker.cvs.sourceforge.net/clicker/c32-lxsdk/kernel/src/sosflppy/lowlevel.asm?view=log lowlevel.asm]
| |||