/// Write a byte to the specified port
pub unsafe fn outb(port: u16, val: u8)
{
	asm!("outb %al, %dx" : : "{dx}"(port), "{al}"(val));
}

/// Read a single byte from the specified port
pub unsafe fn inb(port: u16) -> u8
{
	let ret : u8;
	asm!("inb %dx, %al" : "={ax}"(ret) : "{dx}"(port));
	return ret;
}

/// Write a word (16-bits) to the specified port
pub unsafe fn outw(port: u16, val: u16)
{
	asm!("outw %ax, %dx" : : "{dx}"(port), "{al}"(val));
}

/// Read a word (16-bits) from the specified port
pub unsafe fn inw(port: u16) -> u16
{
	let ret : u16;
	asm!("inw %dx, %ax" : "={ax}"(ret) : "{dx}"(port));
	return ret;
}

/// Write a long/double-word (32-bits) to the specified port
pub unsafe fn outl(port: u16, val: u32)
{
	asm!("outl %eax, %dx" : : "{dx}"(port), "{al}"(val));
}

/// Read a long/double-word (32-bits) from the specified port
pub unsafe fn inl(port: u16) -> u32
{
	let ret : u32;
	asm!("inl %dx, %eax" : "={ax}"(ret) : "{dx}"(port));
	return ret;
}