Added possibility of altering default input port setting for devices. [Miodrag Milanovic]

src/emu/devintrf.c

@@ -293,6 +293,7 @@ device_config::device_config(const machine_config &mconfig, device_type type, co
 	  m_clock(clock),
 	  m_machine_config(mconfig),
 	  m_static_config(NULL),
+	  m_input_defaults(NULL),
 	  m_name(name),
 	  m_tag(tag),
 	  m_config_complete(false)

src/emu/devintrf.h

@@ -108,6 +108,8 @@ device_t *_ConfigClass::alloc_device(running_machine &machine) const					\
 #define MCFG_DEVICE_CLOCK(_clock) \
 	device_config::static_set_clock(device, _clock); \
 
+#define MCFG_DEVICE_INPUT_DEFAULTS(_config) \
+	device_config::static_set_input_default(device, DEVICE_INPUT_DEFAULTS_NAME(_config)); \
 
 
 //**************************************************************************
@@ -128,6 +130,7 @@ struct rom_entry;
 class machine_config;
 class emu_timer;
 typedef union _input_port_token input_port_token;
+typedef struct _input_device_default input_device_default;
 
 
 // exception classes
@@ -289,6 +292,7 @@ public:
 	const char *tag() const { return m_tag; }
 	const void *static_config() const { return m_static_config; }
 	const machine_config &mconfig() const { return m_machine_config; }
+	const input_device_default *input_ports_defaults() const  { return m_input_defaults; }
 
 	// methods that wrap both interface-level and device-level behavior
 	void config_complete();
@@ -297,6 +301,7 @@ public:
 	// configuration helpers
 	static void static_set_clock(device_config *device, UINT32 clock) { device->m_clock = clock; }
 	static void static_set_static_config(device_config *device, const void *config) { device->m_static_config = config; }
+	static void static_set_input_default(device_config *device, const input_device_default *config) { device->m_input_defaults = config; }
 
 	//------------------- begin derived class overrides
 
@@ -327,6 +332,7 @@ protected:
 
 	const machine_config &	m_machine_config;		// reference to the machine's configuration
 	const void *			m_static_config;		// static device configuration
+	const input_device_default *m_input_defaults;   // devices input ports default overrides
 
 	astring					m_name;					// name of the device
 	astring					m_shortname;			// short name of the device, used for potential romload

src/emu/inptport.c

@@ -2931,6 +2931,29 @@ static int frame_get_digital_field_state(const input_field_config *field, int mo
     PORT CONFIGURATION HELPERS
 ***************************************************************************/
 
+/*-------------------------------------------------
+    port_default_value - updates default value
+	of port settings according to device settings
+-------------------------------------------------*/
+
+static UINT32 port_default_value(const char *fulltag, UINT32 mask, UINT32 defval, device_config *owner)
+{
+	astring tempstring;
+	const input_device_default *def = NULL;
+	if (owner!=NULL) {
+		def = owner->input_ports_defaults();
+		if (def!=NULL) {
+			while (def->tag!=NULL) {
+				if ((strcmp(fulltag,owner->subtag(tempstring,def->tag))==0) &&  (def->mask == mask)) {
+					return def->defvalue;
+				}
+				def++;
+			}
+		}
+	}
+	return defval;
+}
+
 /*-------------------------------------------------
     port_config_detokenize - recursively
     detokenize a series of input port tokens
@@ -3410,6 +3433,7 @@ static void port_config_detokenize(ioport_list &portlist, const input_port_token
 				TOKEN_GET_UINT64_UNPACK2(ipt, mask, 32, defval, 32);
 				if (curfield != NULL)
 					field_config_insert(curfield, &maskbits, errorbuf, errorbuflen);
+				defval = port_default_value(fulltag,mask,defval,owner);	
 				curfield = field_config_alloc(curport, IPT_DIPSWITCH, defval, mask);
 				cursetting = NULL;
 				curfield->name = input_port_string_from_token(*ipt++);
@@ -3488,6 +3512,7 @@ static void port_config_detokenize(ioport_list &portlist, const input_port_token
 				TOKEN_GET_UINT64_UNPACK2(ipt, mask, 32, defval, 32);
 				if (curfield != NULL)
 					field_config_insert(curfield, &maskbits, errorbuf, errorbuflen);
+				defval = port_default_value(fulltag,mask,defval,owner);	
 				curfield = field_config_alloc(curport, IPT_CONFIG, defval, mask);
 				cursetting = NULL;
 				curfield->name = input_port_string_from_token(*ipt++);
@@ -3519,6 +3544,7 @@ static void port_config_detokenize(ioport_list &portlist, const input_port_token
 				TOKEN_GET_UINT64_UNPACK2(ipt, mask, 32, defval, 32);
 				if (curfield != NULL)
 					field_config_insert(curfield, &maskbits, errorbuf, errorbuflen);
+				defval = port_default_value(fulltag,mask,defval,owner);
 				curfield = field_config_alloc(curport, IPT_CATEGORY, defval, mask);
 				cursetting = NULL;
 				curfield->name = input_port_string_from_token(*ipt++);

src/emu/inptport.h

@@ -723,7 +723,14 @@ struct _input_field_user_settings
 	UINT8						reverse;		/* for analog controls */
 };
 
-
+/* device defined default input settings */
+typedef struct _input_device_default input_device_default;
+struct _input_device_default
+{
+	const char *				tag;			/* tag of port to update */
+	input_port_value			mask;			/* mask to apply to the port */
+	input_port_value			defvalue;		/* new default value */
+};
 /* a single input port configuration */
 class input_port_config
 {
@@ -1024,6 +1031,20 @@ struct _inp_header
 	TOKEN_STRING(_name),
 
 
+/* name of table */
+#define DEVICE_INPUT_DEFAULTS_NAME(_name) device_iptdef_##_name
+
+/* start of table */
+#define DEVICE_INPUT_DEFAULTS_START(_name) \
+	const input_device_default DEVICE_INPUT_DEFAULTS_NAME(_name)[] = {
+
+/* end of table */
+#define DEVICE_INPUT_DEFAULTS(_tag,_mask,_defval) \
+	{ _tag ,_mask, _defval }, \
+
+/* end of table */
+#define DEVICE_INPUT_DEFAULTS_END \
+	{NULL,0,0} };
 
 /***************************************************************************
     HELPER MACROS