diff --git a/libbozo/headers/sys/io.h b/libbozo/headers/sys/io.h
index c072f04..01fc098 100644
--- a/libbozo/headers/sys/io.h
+++ b/libbozo/headers/sys/io.h
@@ -13,3 +13,15 @@ static inline uint8_t inb(uint16_t port)
 	__asm__ volatile("inb %w1, %b0" : "=a"(ret) : "Nd"(port) : "memory");
 	return ret;
 }
+
+static inline void outw(uint16_t port, uint16_t val)
+{
+	__asm__ volatile("outb %b0, %w1" : : "a"(val), "Nd"(port) : "memory");
+}
+
+static inline uint16_t inw(uint16_t port)
+{
+	uint8_t ret;
+	__asm__ volatile("inb %w1, %b0" : "=a"(ret) : "Nd"(port) : "memory");
+	return ret;
+}