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Diffstat (limited to 'src/devices/bus/gamegear/ggext.c')
-rw-r--r--src/devices/bus/gamegear/ggext.c120
1 files changed, 120 insertions, 0 deletions
diff --git a/src/devices/bus/gamegear/ggext.c b/src/devices/bus/gamegear/ggext.c
new file mode 100644
index 00000000000..7419ec1d45a
--- /dev/null
+++ b/src/devices/bus/gamegear/ggext.c
@@ -0,0 +1,120 @@
+// license:BSD-3-Clause
+// copyright-holders:Fabio Priuli
+/**********************************************************************
+
+ Sega Game Gear EXT port emulation
+ Also known as Gear-to-Gear (or VS, in Japan) cable connector
+
+**********************************************************************/
+
+#include "ggext.h"
+// slot devices
+#include "smsctrladp.h"
+
+
+
+//**************************************************************************
+// GLOBAL VARIABLES
+//**************************************************************************
+
+const device_type GG_EXT_PORT = &device_creator<gg_ext_port_device>;
+
+
+
+//**************************************************************************
+// CARD INTERFACE
+//**************************************************************************
+
+//-------------------------------------------------
+// device_gg_ext_port_interface - constructor
+//-------------------------------------------------
+
+device_gg_ext_port_interface::device_gg_ext_port_interface(const machine_config &mconfig, device_t &device)
+ : device_slot_card_interface(mconfig,device)
+{
+ m_port = dynamic_cast<gg_ext_port_device *>(device.owner());
+}
+
+
+//-------------------------------------------------
+// ~device_gg_ext_port_interface - destructor
+//-------------------------------------------------
+
+device_gg_ext_port_interface::~device_gg_ext_port_interface()
+{
+}
+
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// gg_ext_port_device - constructor
+//-------------------------------------------------
+
+gg_ext_port_device::gg_ext_port_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+ device_t(mconfig, GG_EXT_PORT, "EXT Port", tag, owner, clock, "gg_ext_port", __FILE__),
+ device_slot_interface(mconfig, *this),
+ m_th_pin_handler(*this),
+ m_pixel_handler(*this)
+{
+}
+
+
+//-------------------------------------------------
+// gg_ext_port_device - destructor
+//-------------------------------------------------
+
+gg_ext_port_device::~gg_ext_port_device()
+{
+}
+
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void gg_ext_port_device::device_start()
+{
+ m_device = dynamic_cast<device_gg_ext_port_interface *>(get_card_device());
+
+ m_th_pin_handler.resolve_safe();
+ m_pixel_handler.resolve_safe(0);
+}
+
+
+UINT8 gg_ext_port_device::port_r()
+{
+ UINT8 data = 0xff;
+ if (m_device)
+ data = m_device->peripheral_r();
+ return data;
+}
+
+void gg_ext_port_device::port_w( UINT8 data )
+{
+ if (m_device)
+ m_device->peripheral_w(data);
+}
+
+
+void gg_ext_port_device::th_pin_w(int state)
+{
+ m_th_pin_handler(state);
+}
+
+UINT32 gg_ext_port_device::pixel_r()
+{
+ return m_pixel_handler();
+}
+
+
+//-------------------------------------------------
+// SLOT_INTERFACE( gg_ext_port_devices )
+//-------------------------------------------------
+
+SLOT_INTERFACE_START( gg_ext_port_devices )
+ SLOT_INTERFACE("smsctrladp", SMS_CTRL_ADAPTOR)
+SLOT_INTERFACE_END