--- truecrypt/boot/windows/bootconsoleio.cpp	2018/04/24 16:49:04	1.1
+++ truecrypt/boot/windows/bootconsoleio.cpp	2018/04/24 16:53:20	1.1.1.4
@@ -28,7 +28,7 @@ void EnableScreenOutput ()
 
 void PrintChar (char c)
 {
-#ifdef TC_TRACING_ENABLED
+#ifdef TC_BOOT_TRACING_ENABLED
 	WriteDebugPort (c);
 #endif
 
@@ -198,6 +198,9 @@ byte GetShiftFlags ()
 
 byte GetKeyboardChar (byte *scanCode)
 {
+	// Work around a bug in the Apple BIOS
+	while (!IsKeyboardCharAvailable());
+
 	byte asciiCode;
 	byte scan;
 	__asm
@@ -231,6 +234,22 @@ bool IsKeyboardCharAvailable ()
 }
 
 
+void ClearBiosKeystrokeBuffer ()
+{
+	__asm
+	{
+		push es
+		xor ax, ax
+		mov es, ax
+		mov di, 0x41e
+		mov cx, 32
+		cld
+		rep stosb
+		pop es
+	}
+}
+
+
 bool IsPrintable (char c)
 {
 	return c >= ' ' && c <= '~';