scr_update 40 usr/sample/tetris/screen.h void scr_update(void); scr_update 104 usr/sample/tetris/tetris.c scr_update(); scr_update 108 usr/sample/tetris/tetris.c scr_update(); scr_update 184 usr/sample/tetris/tetris.c scr_update(); scr_update 229 usr/sample/tetris/tetris.c scr_update();