typedef struct Device Device; struct Device {	QLock;	int active;	void (*init)(void);	u8int (*read)(void);	// byte 0 read	void (*write)(u8int);	// byte 0 write	u8int (*status)(void);	// byte 1 read	void (*cmd)(u8int);	// byte 1 write	u8int dat[14];}; extern Device *devs[];extern Device console;extern Device disk; u8int devread(Device*, u8int);void devwrite(Device*, u8int, u8int); // console.cvoid consinit(void); // disk.cvoid initdisk(int, u32int);