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#pragma once

// Generic system device

//

// Base class for devices in the system. This is a more or less 

// abstract class with suggested methods to be provided in 

// derivatives. Default methods are provided in case the derived

// device class is read-only or write-only.

class clsDevice

{

public:

        clsDevice(void) {};

        void Reset() {};

        bool IsSelected(unsigned int ad) { return false; };

        unsigned int Read(unsigned int ad) { return 0xDEADDEAD; };

        int Write(unsigned int ad, unsigned int dat, unsigned int mask) {};

        // Read the device and optionally set an address reservation.

        unsigned int Read(unsigned int ad, int sr) { return 0xDEADDEAD; };

        // Write the device and optionally clear an address reservation.

        int Write(unsigned int ad, unsigned int dat, unsigned int mask, int cr) {};

        void Step(void) {};

};