Change 1st stage int 13h addressing #123
Merged
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Changed the addressing of the bootloader loading from disk on stage 1, so the buffer doesn't cross the memory segment boundary, as is required by int 13h/ah=42h (see Wikipedia).
With this change the bootloader no longer gets stuck on stage 1 on VirtualBox. Also tested on QEMU and Bochs, but not on real hardware.
Feel free to rewrite in a better way as I have no previous experience with asm.