#define BUTTON_PROGRAM2   275
#define BUTTON_PROGRAM1   274
#define BUTTON_CLEAR      273
#define BUTTON_DIVIDE     272
#define BUTTON_PLUS       271
#define BUTTON_MINUS      270
#define BUTTON_MULTIPLY   269
#define BUTTON_ENTER      268
#define DISPLAY           267
#define BUTTON_9          266
#define BUTTON_8          265
#define BUTTON_7          264
#define BUTTON_6          263
#define BUTTON_5          262
#define BUTTON_4          261
#define BUTTON_3          260
#define BUTTON_2          259
#define BUTTON_1          258
#define BUTTON_0          257
#define REXXCALC          256
