typedef enum {LOW, HIGH} level_t;
+
+void z80_bus_request_or_exit(void);
+
zstate_t z80_bus_state(void);
zstate_t z80_bus_cmd(bus_cmd_t cmd);
void z80_setup_bus(void);
int z80_stat_halt(void);
+int32_t z80_memsize_detect(void);
void z80_write(uint32_t addr, uint8_t data);
uint8_t z80_read(uint32_t addr);
void z80_memset(uint32_t addr, uint8_t data, uint32_t length);