From 70f2bb03fd0ac63243afd985ece7713055845363 Mon Sep 17 00:00:00 2001
From: Andrea Orru <andrea@orru.io>
Date: Wed, 11 Apr 2018 23:11:26 -0700
Subject: outb syscall

---
 std/os/zen.zig | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/std/os/zen.zig b/std/os/zen.zig
index 50d53dca5f..c008243ec7 100644
--- a/std/os/zen.zig
+++ b/std/os/zen.zig
@@ -122,8 +122,9 @@ pub const Syscall = enum(usize) {
     receive       = 2,
     subscribeIRQ  = 3,
     inb           = 4,
-    map           = 5,
-    createThread  = 6,
+    outb          = 5,
+    map           = 6,
+    createThread  = 7,
 };
 
 
@@ -152,6 +153,10 @@ pub fn inb(port: u16) u8 {
     return u8(syscall1(Syscall.inb, port));
 }
 
+pub fn outb(port: u16, value: u8) void {
+    _ = syscall2(Syscall.outb, port, value);
+}
+
 pub fn map(v_addr: usize, p_addr: usize, size: usize, writable: bool) bool {
     return syscall4(Syscall.map, v_addr, p_addr, size, usize(writable)) != 0;
 }
-- 
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