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pinglunliao/holanBoot.s

Created January 15, 2016 09:34
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holanBoot.s
.text
.globl start
.code16
start:
movb $0xE, %ah # write character in text mode for int 10h
movb $'H', %al # write 'H', 'o', 'l', 'a', 'n', ' ', 'w', 'o', 'r', 'l', 'd'
int $0x10
movb $'o', %al
int $0x10
movb $'l', %al
int $0x10
movb $'a', %al
int $0x10
movb $'n', %al
int $0x10
movb $' ', %al
int $0x10
movb $'w', %al
int $0x10
movb $'o', %al
int $0x10
movb $'r', %al
int $0x10
movb $'l', %al
int $0x10
movb $'d', %al
int $0x10
ret
# Fill NOP instruction (opcde = 0x90) till base offset 0x1FE.
.org 0x1FE, 0x90
# This indicates boot disk
boot_flag: .word 0xAA55
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