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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) {};
};