2022-02-23 21:56:12 +00:00
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.code16 # tell the assembler that we're using 16 bit mode
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.global init # makes our label "init" available to the outside
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init: # this is the beginning of our binary later.
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2022-02-24 21:16:57 +00:00
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#jmp init # jump to "init"
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#ljmpw $0xFFFF, $0 # jumps to the "reset vector", doing a reboot
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jmp printhelloworld
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printhelloworld:
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mov $0xe37, %ax
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int $0x10 # video bios interrupt
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mov $0xe38, %ax
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int $0x10 # video bios interrupt
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2022-02-23 21:56:12 +00:00
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.fill 510-(.-init), 1, 0 # add zeroes to make it 510 bytes long
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# . is current position - start position
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.word 0xaa55 # magic bytes that tell BIOS that this is bootable
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# x86 is little endian - so bytes are swapped in memory!
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