ref: a3fb3fb3df5e7898b5bfe141ddd76417bd50075a
dir: /sys/src/games/blit/fns.h/
u16int memread(u32int); void memwrite(u32int, u16int, u16int); int intack(int); int step(void); void meminit(void); void cpureset(void); void keycheck(void); void telnetinit(char *);