rem: static void scrup()
add: scrup()
context: static void scrup(){	int i;	memcpy(kScreenBase, kScreenBase + SCREEN_WIDTH,		SCREEN_WIDTH * SCREEN_HEIGHT * 2 - SCREEN_WIDTH * 2);	screenOffset = (SCREEN_HEIGHT - 1) * SCREEN_WIDTH;	for(i=0; i<SCREEN_WIDTH; i++)		kScreenBase[screenOffset + i] = 0x0720;	line = SCREEN_HEIGHT - 1;}