-/* ========================================================================= */
-/* external functions and definitions imported from main program to game_sp */
-/* ========================================================================= */
+// ============================================================================
+// external functions and definitions imported from main program to game_sp
+// ============================================================================
-/* ========================================================================= */
-/* functions and definitions that are exported from game_sp to main program */
-/* ========================================================================= */
+// ============================================================================
+// functions and definitions that are exported from game_sp to main program
+// ============================================================================
-/* ========================================================================= */
-/* internal functions and definitions that are not exported to main program */
-/* ========================================================================= */
+// ============================================================================
+// internal functions and definitions that are not exported to main program
+// ============================================================================
-/* ------------------------------------------------------------------------- */
-/* constant definitions */
-/* ------------------------------------------------------------------------- */
+// ----------------------------------------------------------------------------
+// constant definitions
+// ----------------------------------------------------------------------------
#define SXSIZE (SCR_FIELDX * TILEX_VAR)
#define SYSIZE (SCR_FIELDY * TILEY_VAR)
#define FXSIZE (MAX_BUF_XSIZE * TILEX_VAR)
#define FYSIZE (MAX_BUF_YSIZE * TILEY_VAR)
#define SXSIZE (SCR_FIELDX * TILEX_VAR)
#define SYSIZE (SCR_FIELDY * TILEY_VAR)
#define FXSIZE (MAX_BUF_XSIZE * TILEX_VAR)
#define FYSIZE (MAX_BUF_YSIZE * TILEY_VAR)
-/* ------------------------------------------------------------------------- */
-/* data structure definitions */
-/* ------------------------------------------------------------------------- */
+// ----------------------------------------------------------------------------
+// data structure definitions
+// ----------------------------------------------------------------------------
-/* ------------------------------------------------------------------------- */
-/* exported variables */
-/* ------------------------------------------------------------------------- */
+// ----------------------------------------------------------------------------
+// exported variables
+// ----------------------------------------------------------------------------
extern int GfxElementLast[SP_MAX_PLAYFIELD_WIDTH][SP_MAX_PLAYFIELD_HEIGHT];
extern int GfxGraphicLast[SP_MAX_PLAYFIELD_WIDTH][SP_MAX_PLAYFIELD_HEIGHT];
extern int GfxGraphic[SP_MAX_PLAYFIELD_WIDTH][SP_MAX_PLAYFIELD_HEIGHT];
extern int GfxElementLast[SP_MAX_PLAYFIELD_WIDTH][SP_MAX_PLAYFIELD_HEIGHT];
extern int GfxGraphicLast[SP_MAX_PLAYFIELD_WIDTH][SP_MAX_PLAYFIELD_HEIGHT];
extern int GfxGraphic[SP_MAX_PLAYFIELD_WIDTH][SP_MAX_PLAYFIELD_HEIGHT];
-/* ------------------------------------------------------------------------- */
-/* exported functions */
-/* ------------------------------------------------------------------------- */
+// ----------------------------------------------------------------------------
+// exported functions
+// ----------------------------------------------------------------------------