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Diffstat (limited to 'src/devices/bus/sms_exp/smsexp.c')
-rw-r--r--src/devices/bus/sms_exp/smsexp.c137
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