linux 0.01 boot.s (copy from linux 0.01)

boot.s is  loaded at 0x7c00 by the  bios startup routines
and moves itself  out of the way to  address 0x90000, and
jumps there.It  then loads  the system at  0x10000, using
BIOS    interrupts.    Thereafter    it   disables    all
interrupts,moves the  system down to 0x0000  , changes to
protected mode and calls  the start of system. The system
then should  reinitialize the protected mode  in it's own
tables, and enables interrupts as needed.

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