#ifndef DEV_H_
    #define DEV_H_

    #include "devices/system.h"
    #include "devices/memory.h"
    #include "devices/math.h"
    #include "devices/clock.h"
    #include "devices/input.h"
    #include "devices/screen.h"
    #include "devices/stream.h"
    #include "devices/file.h"


    // Signals that can be emitted by a device.
    typedef enum {
        SIG_NONE = 0,
        SIG_HALT,
        SIG_DB1,
        SIG_DB2,
        SIG_DB3,
        SIG_DB4,
        SIG_DB5,
        SIG_DB6,
        SIG_SLEEP,
        SIG_RESET,
        SIG_FORK,
    } Signal;

    // Bedrock device bus.
    typedef struct {
        SystemDevice  system;
        MemoryDevice  memory;
        MathDevice      math;
        ClockDevice    clock;
        InputDevice    input;
        ScreenDevice  screen;
        StreamDevice  stream;
        FileDevice      file;
    } DeviceBus;

    // Methods.
    void dev_reset(DeviceBus *d);
    u8 dev_read(DeviceBus *d, u8 port);
    Signal dev_write(DeviceBus *d, u8 port, u8 v);

    // Duplicate declarations from main.
    void open_keyboard(void);
    void close_keyboard(void);
#endif