1 files changed, 15 insertions, 0 deletions
diff --git a/boot/port.zig b/boot/port.zig
index be760b1..d38f829 100644
--- a/boot/port.zig
+++ b/boot/port.zig
@@ -17,3 +17,18 @@ pub inline fn inb(port: u16) u8 {
         : [port] "N{dx}" (port),
     );
 }
+
+pub inline fn outw(port: u16, val: u16) void {
+    asm volatile ("outw %[val], %[port]"
+        :
+        : [val] "{ax}" (val),
+          [port] "N{dx}" (port),
+    );
+}
+
+pub inline fn inw(port: u16) u16 {
+    return asm volatile ("inw %[port], %[result]"
+        : [result] "={ax}" (-> u16),
+        : [port] "N{dx}" (port),
+    );
+}