void sprite_screen(char *data) ;
int spset(int x, int y, int h, int v) ;
void spput(int sc, int pt, int x, int y, int of) ;
void sprite_on(int max) ;
void sprite_off(int max) ;
void sprite_wait(int max) ;
void spoffset(int x, int y) ;
void dotscroll(int x) ;
void makechip(unsigned short c[], unsigned short pt[], int ysize) ;
void putchip(unsigned short *c, unsigned int a, int x, int y) ;
void chiptobit(short *bitmap, short *chip, short *data, int x, int y) ;