#if defined( __C51__ )
// For Keil C51, use the m-space keyword extensions
#define  DATA  data
#define IDATA idata
#define PDATA pdata
#define XDATA xdata
#else
// For other compilers, remove the m-space keyword extensions
#define  DATA  
#define IDATA 
#define PDATA 
#define XDATA 
#endif