void block_andor(void *src, size_t n, int andpat, int orpat);\r
void spend_cycles(int c); // utility\r
void soft_scale(void *dst, unsigned short *pal, int offs, int lines);\r
void block_andor(void *src, size_t n, int andpat, int orpat);\r
void spend_cycles(int c); // utility\r
void soft_scale(void *dst, unsigned short *pal, int offs, int lines);\r