01_exercise/bootloader.c


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/* needs to stay the first line */
asm(".code16gcc\njmp $0, $main");

/* space for additional code */

void main(void)
{
    asm(
        "mov $0x007, %%ebx;"
        "mov $0xE4E, %%eax; int $0x10;"
        "mov $0xE69, %%eax; int $0x10;"
        "mov $0xE63, %%eax; int $0x10;"
        "mov $0xE65, %%eax; int $0x10;"
        "mov $0xE20, %%eax; int $0x10;"
        "mov $0xE42, %%eax; int $0x10;"
        "mov $0xE6F, %%eax; int $0x10;"
        "mov $0xE6F, %%eax; int $0x10;"
        "mov $0xE74, %%eax; int $0x10;"
        "mov $0xE73, %%eax; int $0x10;"
        "jmp .;"
        ::: "eax", "ebx"
    );
}