HelenOS sources

D_LAST            242 uspace/app/tetris/screen.c 	curscreen[D_LAST * B_COLS - 1] = -1;
D_LAST            291 uspace/app/tetris/screen.c 	for (j = D_FIRST; j < D_LAST; j++) {
D_LAST            216 uspace/dist/src/c/demos/tetris/screen.c 	curscreen[D_LAST * B_COLS - 1] = -1;
D_LAST            265 uspace/dist/src/c/demos/tetris/screen.c 	for (j = D_FIRST; j < D_LAST; j++) {
HelenOS homepage, sources at GitHub