X-Git-Url: http://git.joshuawise.com/netwatch.git/blobdiff_plain/c07c6eba644d5b947f38a6fb79489ff3584196cf..a6327524107e76c689841eda10fbc19030b4cd15:/lib/serial.c

diff --git a/lib/serial.c b/lib/serial.c
index 0cbb495..95d8300 100644
--- a/lib/serial.c
+++ b/lib/serial.c
@@ -1,3 +1,13 @@
+/* serial.c
+ * Serial output routines.
+ * NetWatch system management mode administration console
+ *
+ * Copyright (c) 2008 Jacob Potter and Joshua Wise.  All rights reserved.
+ * This program is free software; you can redistribute and/or modify it under
+ * the terms found in the file LICENSE in the root of this source tree.
+ *
+ */
+
 #include <minilib.h>
 #include <io.h>
 
@@ -44,7 +54,9 @@ void serial_init()
 
 void serial_tx(unsigned char c)
 {
-	while (!(_inb(SER_LSR) & SER_LSR_THR_EMPTY))
+	int i = 100000;
+	
+	while (!(_inb(SER_LSR) & SER_LSR_THR_EMPTY) && (i--))
 		;
 	_outb(SER_THR, c);
 }