request_page := fn(page_count: u8): ^u8 {
	msg := "\{00}\{01}xxxxxxxx\0"
	msg_page_count := msg + 1;
	*msg_page_count = page_count
	return @eca(^u8, 3, 2, msg, 12)
}

release_page := fn(ptr: ^u8, page_count: u8): void {
	msg := "\{01}\{00}xxxxxxxx\0"

	msg_page_count := msg + 1;
	*msg_page_count = page_count

	msg_ptr := @as(^^u8, @bitcast(msg + 2));
	*msg_ptr = ptr

	return @eca(void, 3, 2, msg, 12)
}

OutbMsg := struct {a: u8, b: u8, addr: u16, value: u8}
InbMsg := struct {a: u8, b: u8, addr: u16}
OutlMsg := struct {a: u8, b: u8, addr: u16, value: u32}
InlMsg := struct {a: u8, b: u8, addr: u16}

outb := fn(addr: u16, value: u8): void {
	return @eca(void, 3, 3, &OutbMsg.(1, 0, addr, value), @sizeof(OutbMsg))
}

inb := fn(addr: u16): u8 {
	return @eca(u8, 3, 3, &InbMsg.(0, 0, addr), @sizeof(InbMsg))
}

outl := fn(addr: u16, value: u32): void {
	return @eca(void, 3, 3, &OutlMsg.(1, 2, addr, value), @sizeof(OutlMsg))
}

inl := fn(addr: u16): u32 {
	return @eca(u32, 3, 3, &InlMsg.(0, 2, addr), @sizeof(InlMsg))
}