// license:BSD-3-Clause
// copyright-holders:Wilbert Pol
/***********************************************************************************************************

   MSX (logical) internal slot/page interfacing

The MSX standard uses logically defined slots, subslots, and pages to access rom and optional components
in a system. There are no physical slots inside the system. A piece of rom/component can occur in multiple
pages; and multiple pieces of rom/ram/components can occur in a single slot.

***********************************************************************************************************/

#ifndef __MSX_SLOT_SLOT_H
#define __MSX_SLOT_SLOT_H

#define MCFG_MSX_INTERNAL_SLOT_ADD(_tag, _type, _startpage, _numpages) \
	MCFG_DEVICE_ADD(_tag, _type, 0) \
	msx_internal_slot_interface::set_start_address(*device, _startpage * 0x4000); \
	msx_internal_slot_interface::set_size(*device, _numpages * 0x4000);

class msx_internal_slot_interface
{
public:
	msx_internal_slot_interface();
	virtual ~msx_internal_slot_interface() { }

	// static configuration helpers
	static void set_start_address(device_t &device, UINT32 start_address);
	static void set_size(device_t &device, UINT32 size);

	virtual DECLARE_READ8_MEMBER(read) { return 0xFF; }
	virtual DECLARE_WRITE8_MEMBER(write) { }

protected:
	UINT32 m_start_address;
	UINT32 m_size;
	UINT32 m_end_address;
};

#endif
