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// license:BSD-3-Clause
// copyright-holders:Fabio Priuli
/**********************************************************************
Sega Master System expansion slot emulation
**********************************************************************
**********************************************************************/
#ifndef MAME_BUS_SMS_EXP_SMSEXP_H
#define MAME_BUS_SMS_EXP_SMSEXP_H
#pragma once
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> device_sms_expansion_slot_interface
// class representing interface-specific live sms_expansion card
class device_sms_expansion_slot_interface : public device_slot_card_interface
{
public:
// construction/destruction
virtual ~device_sms_expansion_slot_interface();
// reading and writing
virtual DECLARE_READ8_MEMBER(read) { return 0xff; }
virtual DECLARE_WRITE8_MEMBER(write) { }
virtual DECLARE_WRITE8_MEMBER(write_mapper) { }
virtual DECLARE_READ8_MEMBER(read_ram) { return 0xff; }
virtual DECLARE_WRITE8_MEMBER(write_ram) { }
virtual int get_lphaser_xoffs() { return 0; }
protected:
device_sms_expansion_slot_interface(const machine_config &mconfig, device_t &device);
};
// ======================> sms_expansion_slot_device
class sms_expansion_slot_device : public device_t,
public device_slot_interface
{
public:
// construction/destruction
template <typename T>
sms_expansion_slot_device(machine_config const &mconfig, char const *tag, device_t *owner, T &&opts, char const *dflt)
: sms_expansion_slot_device(mconfig, tag, owner, 0)
{
option_reset();
opts(*this);
set_default_option(dflt);
set_fixed(false);
}
sms_expansion_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock = 0);
virtual ~sms_expansion_slot_device();
// reading and writing
DECLARE_READ8_MEMBER(read) { return m_device ? m_device->read(space, offset, mem_mask) : 0xff; }
DECLARE_WRITE8_MEMBER(write) { if (m_device) m_device->write(space, offset, data, mem_mask); }
DECLARE_WRITE8_MEMBER(write_mapper) { if (m_device) m_device->write_mapper(space, offset, data, mem_mask); }
DECLARE_READ8_MEMBER(read_ram) { return m_device ? m_device->read_ram(space, offset, mem_mask) : 0xff; }
DECLARE_WRITE8_MEMBER(write_ram) { if (m_device) m_device->write_ram(space, offset, data, mem_mask); }
int get_lphaser_xoffs() { return m_device ? m_device->get_lphaser_xoffs() : 0; }
bool device_present() const { return bool(m_device); }
protected:
// device-level overrides
virtual void device_start() override;
device_sms_expansion_slot_interface *m_device;
};
// device type definition
DECLARE_DEVICE_TYPE(SMS_EXPANSION_SLOT, sms_expansion_slot_device)
void sms_expansion_devices(device_slot_interface &device);
#endif // MAME_BUS_SMS_EXP_SMSEXP_H
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