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https://github.com/cfenollosa/os-tutorial.git
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28 lines
493 B
NASM
28 lines
493 B
NASM
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mov ah, 0x0e ; tty
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mov al, [the_secret]
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int 0x10 ; we already saw this doesn't work, right?
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mov bx, 0x7c0 ; remember, the segment is automatically <<4 for you
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mov ds, bx
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; WARNING: from now on all memory references will be offset by 'ds' implicitly
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mov al, [the_secret]
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int 0x10
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mov al, [es:the_secret]
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int 0x10 ; doesn't look right... isn't 'es' currently 0x000?
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mov bx, 0x7c0
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mov es, bx
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mov al, [es:the_secret]
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int 0x10
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jmp $
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the_secret:
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db "X"
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times 510 - ($-$$) db 0
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dw 0xaa55
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