--- SIDPlayer/src/sys.h	2000/07/28 12:42:30	1.1.1.1
+++ SIDPlayer/src/sys.h	2004/01/12 15:15:49	1.6
@@ -1,7 +1,7 @@
 /*
  *  sys.h - System-dependant functions
  *
- *  SIDPlayer (C) Copyright 1996-2000 Christian Bauer
+ *  SIDPlayer (C) Copyright 1996-2004 Christian Bauer
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -29,7 +29,14 @@
 
 #include "types.h"
 
-// Dummy SDL definitions
+
+#if defined (SDL)
+
+#include <SDL.h>
+
+#else
+
+// Dummy SDL definitions for SIDPlayer
 typedef struct {
 	int freq;			// DSP frequency -- samples per second
 	uint16 format;		// Audio data format
@@ -45,10 +52,17 @@ typedef struct {
 #define AUDIO_S8 0x8008
 #define AUDIO_S16SYS 0x0010
 
-#define SDL_OpenAudio(desired, obtained)
+#define SDL_OpenAudio(desired, obtained) (0)
 #define SDL_CloseAudio()
 #define SDL_PauseAudio(onoff)
 #define SDL_LockAudio()
 #define SDL_UnlockAudio()
+#define SDL_GetError() ("unknown error")
+
+#endif
+
+// Microsecond-resolution timing functions
+extern uint64 GetTicks_usec();
+extern void Delay_usec(uint32 usec);
 
 #endif