--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hal.h	Wed Jan 03 08:49:36 2007 +0000
@@ -0,0 +1,49 @@
+/* $Id$ */
+
+#ifndef HAL_H
+#define HAL_H
+
+typedef struct {
+	const char *(*start)(const char * const *parm);
+	void (*stop)(void);
+} HalCommonDriver;
+
+typedef struct {
+	const char *(*start)(const char * const *parm);
+	void (*stop)(void);
+	void (*make_dirty)(int left, int top, int width, int height);
+	void (*main_loop)(void);
+	bool (*change_resolution)(int w, int h);
+	void (*toggle_fullscreen)(bool fullscreen);
+} HalVideoDriver;
+
+typedef struct {
+	const char *(*start)(const char * const *parm);
+	void (*stop)(void);
+} HalSoundDriver;
+
+typedef struct {
+	const char *(*start)(const char * const *parm);
+	void (*stop)(void);
+
+	void (*play_song)(const char *filename);
+	void (*stop_song)(void);
+	bool (*is_song_playing)(void);
+	void (*set_volume)(byte vol);
+} HalMusicDriver;
+
+VARDEF HalMusicDriver *_music_driver;
+VARDEF HalSoundDriver *_sound_driver;
+VARDEF HalVideoDriver *_video_driver;
+
+enum DriverType {
+	VIDEO_DRIVER = 0,
+	SOUND_DRIVER = 1,
+	MUSIC_DRIVER = 2,
+};
+
+void GameLoop(void);
+
+void CreateConsole(void);
+
+#endif /* HAL_H */