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);