diff options
Diffstat (limited to 'src/devices/bus/sms_exp/smsexp.c')
-rw-r--r-- | src/devices/bus/sms_exp/smsexp.c | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/src/devices/bus/sms_exp/smsexp.c b/src/devices/bus/sms_exp/smsexp.c new file mode 100644 index 00000000000..9b26999a94b --- /dev/null +++ b/src/devices/bus/sms_exp/smsexp.c @@ -0,0 +1,137 @@ +// license:BSD-3-Clause +// copyright-holders:Fabio Priuli +/********************************************************************** + + Sega Master System expansion slot emulation + +**********************************************************************/ + +#include "smsexp.h" + + + +//************************************************************************** +// GLOBAL VARIABLES +//************************************************************************** + +const device_type SMS_EXPANSION_SLOT = &device_creator<sms_expansion_slot_device>; + + + +//************************************************************************** +// CARD INTERFACE +//************************************************************************** + +//------------------------------------------------- +// device_sms_expansion_slot_interface - constructor +//------------------------------------------------- + +device_sms_expansion_slot_interface::device_sms_expansion_slot_interface(const machine_config &mconfig, device_t &device) + : device_slot_card_interface(mconfig,device) +{ +} + + +//------------------------------------------------- +// ~device_sms_expansion_slot_interface - destructor +//------------------------------------------------- + +device_sms_expansion_slot_interface::~device_sms_expansion_slot_interface() +{ +} + + + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +//------------------------------------------------- +// sms_expansion_slot_device - constructor +//------------------------------------------------- + +sms_expansion_slot_device::sms_expansion_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : + device_t(mconfig, SMS_EXPANSION_SLOT, "Sega SMS expansion slot", tag, owner, clock, "sms_expansion_slot", __FILE__), + device_slot_interface(mconfig, *this) +{ +} + + +//------------------------------------------------- +// sms_expansion_slot_device - destructor +//------------------------------------------------- + +sms_expansion_slot_device::~sms_expansion_slot_device() +{ +} + + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void sms_expansion_slot_device::device_start() +{ + m_device = dynamic_cast<device_sms_expansion_slot_interface *>(get_card_device()); +} + + +//------------------------------------------------- +// read +//------------------------------------------------- + +READ8_MEMBER(sms_expansion_slot_device::read) +{ + if (m_device) + return m_device->read(space, offset); + else + return 0xff; +} + +READ8_MEMBER(sms_expansion_slot_device::read_ram) +{ + if (m_device) + return m_device->read_ram(space, offset); + else + return 0xff; +} + +int sms_expansion_slot_device::get_lphaser_xoffs() +{ + if (m_device) + return m_device->get_lphaser_xoffs(); + else + return 0; +} + + +//------------------------------------------------- +// write +//------------------------------------------------- + +WRITE8_MEMBER(sms_expansion_slot_device::write_mapper) +{ + if (m_device) + m_device->write_mapper(space, offset, data); +} + +WRITE8_MEMBER(sms_expansion_slot_device::write) +{ + if (m_device) + m_device->write(space, offset, data); +} + +WRITE8_MEMBER(sms_expansion_slot_device::write_ram) +{ + if (m_device) + m_device->write_ram(space, offset, data); +} + + +//------------------------------------------------- +// SLOT_INTERFACE( sms_expansion_devices ) +//------------------------------------------------- + +SLOT_INTERFACE_START( sms_expansion_devices ) + SLOT_INTERFACE("genderadp", SMS_GENDER_ADAPTER) +SLOT_INTERFACE_END |