From d474c8fa7fc9ec995cd675349859a0391e6e0bd0 Mon Sep 17 00:00:00 2001
From: Philipp Oppermann <dev@phil-opp.com>
Date: Thu, 13 Aug 2015 13:01:18 +0200
Subject: [PATCH] Add error function

---
 src/arch/x86_64/boot.asm | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/arch/x86_64/boot.asm b/src/arch/x86_64/boot.asm
index ec2bebad..b6a7c006 100644
--- a/src/arch/x86_64/boot.asm
+++ b/src/arch/x86_64/boot.asm
@@ -20,3 +20,12 @@ start:
     ; print `OK` to screen
     mov dword [0xb8000], 0x2f4b2f4f
     hlt
+
+; Prints `ERR: ` and the given error code to screen and hangs.
+; parameter: error code (in ascii) in al
+error:
+    mov dword [0xb8000], 0x4f524f45
+    mov dword [0xb8004], 0x4f3a4f52
+    mov dword [0xb8008], 0x4f204f20
+    mov byte  [0xb800a], al
+    hlt