__asm
{
   mov al, 2
   mov dx, 0xD007
   out dx, al
}

__asm mov al, 2
__asm mov dx, 0xD007
__asm out dx, al

__asm mov al, 2   __asm mov dx, 0xD007   __asm out dx, al

asm ("movb $0x2, %al\n\t"
     "movw $0xd007, %dx\n\t"
     "outb %al, %dx");