Consolidating implementations of create_option_guide() that return nullptr

src/devices/bus/a7800/a78_slot.h

@@ -107,7 +107,6 @@ public:
 	virtual bool is_creatable() const override { return 0; }
 	virtual bool must_be_loaded() const override { return 0; }
 	virtual bool is_reset_on_load() const override { return 1; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 	virtual const char *image_interface() const override { return "a7800_cart"; }
 	virtual const char *file_extensions() const override { return "bin,a78"; }
 	virtual device_image_partialhash_func get_partial_hash() const override { return &a78_partialhash; }

src/devices/bus/a800/a800_slot.h

@@ -108,7 +108,6 @@ public:
 	virtual bool is_creatable() const override { return 0; }
 	virtual bool must_be_loaded() const override { return 0; }
 	virtual bool is_reset_on_load() const override { return 1; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 	virtual const char *image_interface() const override { return "a8bit_cart"; }
 	virtual const char *file_extensions() const override { return "bin,rom,car"; }
 

src/devices/bus/adam/exp.h

@@ -84,7 +84,6 @@ protected:
 	virtual bool is_reset_on_load() const override { return 1; }
 	virtual const char *image_interface() const override { return "adam_rom"; }
 	virtual const char *file_extensions() const override { return "bin,rom"; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 
 	// slot interface overrides
 	virtual std::string get_default_card_software() override;

src/devices/bus/apf/slot.h

@@ -79,7 +79,6 @@ public:
 	virtual bool is_creatable() const override { return 0; }
 	virtual bool must_be_loaded() const override { return 0; }
 	virtual bool is_reset_on_load() const override { return 1; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 	virtual const char *image_interface() const override { return "apfm1000_cart"; }
 	virtual const char *file_extensions() const override { return "bin"; }
 

src/devices/bus/arcadia/slot.h

@@ -68,7 +68,6 @@ public:
 	virtual bool is_creatable() const override { return 0; }
 	virtual bool must_be_loaded() const override { return 1; }
 	virtual bool is_reset_on_load() const override { return 1; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 	virtual const char *image_interface() const override { return "arcadia_cart"; }
 	virtual const char *file_extensions() const override { return "bin"; }
 

src/devices/bus/astrocde/slot.h

@@ -68,7 +68,6 @@ public:
 	virtual bool is_creatable() const override { return 0; }
 	virtual bool must_be_loaded() const override { return 0; }
 	virtual bool is_reset_on_load() const override { return 1; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 	virtual const char *image_interface() const override { return "astrocde_cart"; }
 	virtual const char *file_extensions() const override { return "bin"; }
 

src/devices/bus/c64/exp.h

@@ -146,7 +146,6 @@ protected:
 	virtual bool is_reset_on_load() const override { return 1; }
 	virtual const char *image_interface() const override { return "c64_cart,vic10_cart"; }
 	virtual const char *file_extensions() const override { return "80,a0,e0,crt"; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 
 	// slot interface overrides
 	virtual std::string get_default_card_software() override;

src/devices/bus/cbm2/exp.h

@@ -93,7 +93,6 @@ protected:
 	virtual bool is_reset_on_load() const override { return 1; }
 	virtual const char *image_interface() const override { return "cbm2_cart"; }
 	virtual const char *file_extensions() const override { return "20,40,60"; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 
 	// slot interface overrides
 	virtual std::string get_default_card_software() override;

src/devices/bus/chanf/slot.h

@@ -82,7 +82,6 @@ public:
 	virtual bool is_creatable() const override { return 0; }
 	virtual bool must_be_loaded() const override { return 0; }
 	virtual bool is_reset_on_load() const override { return 1; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 	virtual const char *image_interface() const override { return "channelf_cart"; }
 	virtual const char *file_extensions() const override { return "bin,chf"; }
 

src/devices/bus/coco/cococart.h

@@ -99,7 +99,6 @@ public:
 	virtual bool is_reset_on_load() const override { return 1; }
 	virtual const char *image_interface() const override { return "coco_cart"; }
 	virtual const char *file_extensions() const override { return "ccc,rom"; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 
 	// slot interface overrides
 	virtual std::string get_default_card_software() override;

src/devices/bus/coleco/exp.h

@@ -90,7 +90,6 @@ protected:
 	virtual bool is_reset_on_load() const override { return 1; }
 	virtual const char *image_interface() const override { return ":coleco_cart"; }
 	virtual const char *file_extensions() const override { return "rom,col,bin"; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 
 	// slot interface overrides
 	virtual std::string get_default_card_software() override;

src/devices/bus/cpc/cpc_rom.h

@@ -37,7 +37,6 @@ public:
 	virtual bool is_reset_on_load() const override { return 1; }
 	virtual const char *image_interface() const override { return "cpc_rom"; }
 	virtual const char *file_extensions() const override { return "rom,bin"; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 
 	UINT8* base() { return m_base.get(); }
 

src/devices/bus/crvision/slot.h

@@ -73,7 +73,6 @@ public:
 	virtual bool is_creatable() const override { return 0; }
 	virtual bool must_be_loaded() const override { return 0; }
 	virtual bool is_reset_on_load() const override { return 1; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 	virtual const char *image_interface() const override { return "crvision_cart"; }
 	virtual const char *file_extensions() const override { return "bin,rom"; }
 

src/devices/bus/gameboy/gb_slot.h

@@ -136,7 +136,6 @@ public:
 	virtual bool is_creatable() const override { return 0; }
 	virtual bool must_be_loaded() const override { return 0; }
 	virtual bool is_reset_on_load() const override { return 1; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 	virtual const char *image_interface() const override { return "gameboy_cart"; }
 	virtual const char *file_extensions() const override { return "bin,gb,gbc"; }
 

src/devices/bus/gba/gba_slot.h

@@ -103,7 +103,6 @@ public:
 	virtual bool is_creatable() const override { return 0; }
 	virtual bool must_be_loaded() const override { return 0; }
 	virtual bool is_reset_on_load() const override { return 1; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 	virtual const char *image_interface() const override { return "gba_cart"; }
 	virtual const char *file_extensions() const override { return "gba,bin"; }
 

src/devices/bus/generic/slot.h

@@ -125,7 +125,6 @@ public:
 	virtual bool is_creatable() const override { return 0; }
 	virtual bool must_be_loaded() const override { return m_must_be_loaded; }
 	virtual bool is_reset_on_load() const override { return 1; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 	virtual const char *image_interface() const override { return m_interface; }
 	virtual const char *file_extensions() const override { return m_extensions; }
 

src/devices/bus/intv/slot.h

@@ -115,7 +115,6 @@ public:
 	virtual bool is_creatable() const override { return 0; }
 	virtual bool must_be_loaded() const override { return 0; }
 	virtual bool is_reset_on_load() const override { return 1; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 	virtual const char *image_interface() const override { return "intv_cart"; }
 	virtual const char *file_extensions() const override { return "bin,int,rom,itv"; }
 

src/devices/bus/iq151/iq151.h

@@ -103,7 +103,6 @@ public:
 	virtual bool is_reset_on_load() const override { return 1; }
 	virtual const char *image_interface() const override { return "iq151_cart"; }
 	virtual const char *file_extensions() const override { return "bin,rom"; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 
 	// slot interface overrides
 	virtual std::string get_default_card_software() override;

src/devices/bus/isa/omti8621.cpp

@@ -63,7 +63,6 @@ public:
 	virtual bool is_reset_on_load() const override { return 0; }
 	virtual const char *image_interface() const override { return nullptr; }
 	virtual const char *file_extensions() const override { return "awd"; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 
 	virtual bool call_create(int format_type, util::option_resolution *format_options) override;
 protected:

src/devices/bus/isa/sc499.h

@@ -41,7 +41,6 @@ public:
 	virtual bool is_reset_on_load() const override { return 0; }
 	virtual const char *image_interface() const override { return "sc499_cass"; }
 	virtual const char *file_extensions() const override { return "act,ct"; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 
 	UINT8 *read_block(int block_num);
 	void write_block(int block_num, UINT8 *ptr);

src/devices/bus/kc/kc.h

@@ -101,7 +101,6 @@ public:
 	virtual bool is_reset_on_load() const override { return 1; }
 	virtual const char *image_interface() const override { return "kc_cart"; }
 	virtual const char *file_extensions() const override { return "bin"; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 
 	// slot interface overrides
 	virtual std::string get_default_card_software() override;

src/devices/bus/m5/slot.h

@@ -82,7 +82,6 @@ public:
 	virtual bool is_creatable() const override { return 0; }
 	virtual bool must_be_loaded() const override { return 0; }
 	virtual bool is_reset_on_load() const override { return 1; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 	virtual const char *image_interface() const override { return "m5_cart"; }
 	virtual const char *file_extensions() const override { return "bin,rom"; }
 

src/devices/bus/megadrive/md_slot.h

@@ -161,7 +161,6 @@ public:
 	virtual bool is_creatable() const override { return 0; }
 	virtual bool must_be_loaded() const override { return m_must_be_loaded; }
 	virtual bool is_reset_on_load() const override { return 1; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 
 	// slot interface overrides
 	virtual std::string get_default_card_software() override;

src/devices/bus/msx_slot/cartridge.h

@@ -50,7 +50,6 @@ public:
 	virtual bool is_creatable() const override { return false; }
 	virtual bool must_be_loaded() const override { return false; }
 	virtual bool is_reset_on_load() const override { return true; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 	virtual const char *image_interface() const override { return "msx_cart"; }
 	virtual const char *file_extensions() const override { return "mx1,bin,rom"; }
 

src/devices/bus/neogeo/slot.h

@@ -203,7 +203,6 @@ public:
 	virtual bool is_creatable() const override { return 0; }
 	virtual bool must_be_loaded() const override { return 0; }
 	virtual bool is_reset_on_load() const override { return 1; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 	virtual const char *image_interface() const override { return "neo_cart"; }
 	virtual const char *file_extensions() const override { return "bin"; }
 

src/devices/bus/nes/aladdin.h

@@ -62,7 +62,6 @@ public:
 	virtual bool is_reset_on_load() const override { return 1; }
 	virtual const char *image_interface() const override { return "ade_cart"; }
 	virtual const char *file_extensions() const override { return "nes,bin"; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 
 	// slot interface overrides
 	virtual std::string get_default_card_software() override;

src/devices/bus/nes/datach.h

@@ -64,7 +64,6 @@ public:
 	virtual bool is_reset_on_load() const override { return 1; }
 	virtual const char *image_interface() const override { return "datach_cart"; }
 	virtual const char *file_extensions() const override { return "nes,bin"; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 
 	// slot interface overrides
 	virtual std::string get_default_card_software() override;

src/devices/bus/nes/karastudio.h

@@ -61,7 +61,6 @@ public:
 	virtual bool is_reset_on_load() const override { return 1; }
 	virtual const char *image_interface() const override { return "ks_cart"; }
 	virtual const char *file_extensions() const override { return "bin"; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 
 	// slot interface overrides
 	virtual std::string get_default_card_software() override;

src/devices/bus/nes/nes_slot.h

@@ -360,7 +360,6 @@ public:
 	virtual bool is_reset_on_load() const override { return 1; }
 	virtual const char *image_interface() const override { return "nes_cart"; }
 	virtual const char *file_extensions() const override { return "nes,unf,unif"; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 	virtual device_image_partialhash_func get_partial_hash() const override { return &nes_partialhash; }
 
 	// slot interface overrides

src/devices/bus/nes/sunsoft_dcs.h

@@ -58,8 +58,7 @@ public:
 	virtual bool is_reset_on_load() const override { return 1; }
 	virtual const char *image_interface() const override { return "ntb_cart"; }
 	virtual const char *file_extensions() const override { return "bin"; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
-
+	
 	// slot interface overrides
 	virtual std::string get_default_card_software() override;
 

src/devices/bus/nubus/nubus_image.cpp

@@ -46,7 +46,6 @@ public:
 	virtual bool is_reset_on_load() const override { return 0; }
 	virtual const char *image_interface() const override { return nullptr; }
 	virtual const char *file_extensions() const override { return "img"; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 
 	virtual bool call_load() override;
 	virtual void call_unload() override;

src/devices/bus/odyssey2/slot.h

@@ -79,7 +79,6 @@ public:
 	virtual bool is_creatable() const override { return 0; }
 	virtual bool must_be_loaded() const override { return 0; }
 	virtual bool is_reset_on_load() const override { return 1; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 	virtual const char *image_interface() const override { return "odyssey_cart"; }
 	virtual const char *file_extensions() const override { return "bin,rom"; }
 

src/devices/bus/pce/pce_slot.h

@@ -83,7 +83,6 @@ public:
 	virtual bool is_creatable() const override { return 0; }
 	virtual bool must_be_loaded() const override { return 1; }
 	virtual bool is_reset_on_load() const override { return 1; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 	virtual const char *image_interface() const override { return m_interface; }
 	virtual const char *file_extensions() const override { return "pce,bin"; }
 

src/devices/bus/plus4/exp.h

@@ -132,7 +132,6 @@ protected:
 	virtual bool is_reset_on_load() const override { return 1; }
 	virtual const char *image_interface() const override { return "plus4_cart"; }
 	virtual const char *file_extensions() const override { return "rom,bin"; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 
 	// slot interface overrides
 	virtual std::string get_default_card_software() override;

src/devices/bus/psx/memcard.h

@@ -26,7 +26,6 @@ public:
 	virtual bool must_be_loaded() const override { return 0; }
 	virtual bool is_reset_on_load() const override { return 0; }
 	virtual const char *file_extensions() const override { return "mc"; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 
 	virtual bool call_load() override;
 	virtual bool call_create(int format_type, util::option_resolution *format_options) override;

src/devices/bus/ql/rom.h

@@ -107,7 +107,6 @@ protected:
 	virtual bool is_reset_on_load() const override { return 1; }
 	virtual const char *image_interface() const override { return "ql_cart"; }
 	virtual const char *file_extensions() const override { return "rom,bin"; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 
 	// slot interface overrides
 	virtual std::string get_default_card_software() override;

src/devices/bus/saturn/sat_slot.h

@@ -84,7 +84,6 @@ public:
 	virtual bool is_creatable() const override { return 0; }
 	virtual bool must_be_loaded() const override { return 0; }
 	virtual bool is_reset_on_load() const override { return 1; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 	virtual const char *image_interface() const override { return "sat_cart"; }
 	virtual const char *file_extensions() const override { return "bin"; }
 

src/devices/bus/scv/slot.h

@@ -83,7 +83,6 @@ public:
 	virtual bool is_creatable() const override { return 0; }
 	virtual bool must_be_loaded() const override { return 0; }
 	virtual bool is_reset_on_load() const override { return 1; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 	virtual const char *image_interface() const override { return "scv_cart"; }
 	virtual const char *file_extensions() const override { return "bin"; }
 

src/devices/bus/sega8/sega8_slot.h

@@ -132,7 +132,6 @@ public:
 	virtual bool is_creatable() const override { return 0; }
 	virtual bool must_be_loaded() const override { return m_must_be_loaded; }
 	virtual bool is_reset_on_load() const override { return 1; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 	virtual const char *image_interface() const override { return m_interface; }
 	virtual const char *file_extensions() const override { return m_extensions; }
 

src/devices/bus/snes/snes_slot.h

@@ -177,7 +177,6 @@ public:
 	virtual bool is_creatable() const override { return 0; }
 	virtual bool must_be_loaded() const override { return 1; }
 	virtual bool is_reset_on_load() const override { return 1; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 
 	// slot interface overrides
 	virtual std::string get_default_card_software() override;

src/devices/bus/ti99_peb/ti_rs232.h

@@ -127,8 +127,7 @@ public:
 	bool is_reset_on_load() const override       { return false; }
 	const char *image_interface() const override { return ""; }
 	const char *file_extensions() const override { return ""; }
-	const option_guide *create_option_guide() const override { return nullptr; }
-
+	
 protected:
 	virtual void    device_start(void) override;
 	bool    call_load() override;
@@ -155,8 +154,7 @@ public:
 	bool is_reset_on_load() const override       { return false; }
 	const char *image_interface() const override { return ""; }
 	const char *file_extensions() const override { return ""; }
-	const option_guide *create_option_guide() const override { return nullptr; }
-
+	
 protected:
 	virtual void    device_start(void) override;
 	bool    call_load() override;

src/devices/bus/ti99x/990_tap.cpp

@@ -904,7 +904,6 @@ public:
 	virtual bool is_reset_on_load() const override { return 0; }
 	virtual const char *image_interface() const override { return nullptr; }
 	virtual const char *file_extensions() const override { return "tap"; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 
 	virtual bool call_load() override;
 	virtual void call_unload() override;

src/devices/bus/ti99x/gromport.h

@@ -121,8 +121,7 @@ protected:
 	bool is_reset_on_load() const override       { return false; }
 	const char *image_interface() const override { return "ti99_cart"; }
 	const char *file_extensions() const override { return "rpk"; }
-	const option_guide *create_option_guide() const override { return nullptr; }
-
+	
 private:
 	bool    m_readrom;
 	bool    m_softlist;

src/devices/bus/vboy/slot.h

@@ -78,7 +78,6 @@ public:
 	virtual bool is_creatable() const override { return 0; }
 	virtual bool must_be_loaded() const override { return 1; }
 	virtual bool is_reset_on_load() const override { return 1; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 	virtual const char *image_interface() const override { return "vboy_cart"; }
 	virtual const char *file_extensions() const override { return "vb,bin"; }
 

src/devices/bus/vc4000/slot.h

@@ -80,7 +80,6 @@ public:
 	virtual bool is_creatable() const override { return 0; }
 	virtual bool must_be_loaded() const override { return 0; }
 	virtual bool is_reset_on_load() const override { return 1; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 	virtual const char *image_interface() const override { return "vc4000_cart"; }
 	virtual const char *file_extensions() const override { return "bin,rom"; }
 

src/devices/bus/vcs/vcs_slot.h

@@ -107,7 +107,6 @@ public:
 	virtual bool is_creatable() const override { return 0; }
 	virtual bool must_be_loaded() const override { return 1; }
 	virtual bool is_reset_on_load() const override { return 1; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 	virtual const char *image_interface() const override { return "a2600_cart"; }
 	virtual const char *file_extensions() const override { return "bin,a26"; }
 

src/devices/bus/vectrex/slot.h

@@ -79,7 +79,6 @@ public:
 	virtual bool is_creatable() const override { return 0; }
 	virtual bool must_be_loaded() const override { return 0; }
 	virtual bool is_reset_on_load() const override { return 1; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 	virtual const char *image_interface() const override { return "vectrex_cart"; }
 	virtual const char *file_extensions() const override { return "bin,gam,vec"; }
 

src/devices/bus/vic10/exp.h

@@ -131,7 +131,6 @@ protected:
 	virtual bool is_reset_on_load() const override { return 1; }
 	virtual const char *image_interface() const override { return "vic10_cart"; }
 	virtual const char *file_extensions() const override { return "80,e0"; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 
 	// slot interface overrides
 	virtual std::string get_default_card_software() override;

src/devices/bus/vic20/exp.h

@@ -122,7 +122,6 @@ protected:
 	virtual bool is_reset_on_load() const override { return 1; }
 	virtual const char *image_interface() const override { return "vic1001_cart"; }
 	virtual const char *file_extensions() const override { return "20,40,60,70,a0,b0,crt"; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 
 	// slot interface overrides
 	virtual std::string get_default_card_software() override;

src/devices/bus/vidbrain/exp.h

@@ -147,7 +147,6 @@ protected:
 	virtual bool is_reset_on_load() const override { return 1; }
 	virtual const char *image_interface() const override { return "vidbrain_cart"; }
 	virtual const char *file_extensions() const override { return "bin"; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 
 	// slot interface overrides
 	virtual std::string get_default_card_software() override;

src/devices/bus/wswan/slot.h

@@ -91,7 +91,6 @@ public:
 	virtual bool is_creatable() const override { return 0; }
 	virtual bool must_be_loaded() const override { return 1; }
 	virtual bool is_reset_on_load() const override { return 1; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 	virtual const char *image_interface() const override { return "wswan_cart"; }
 	virtual const char *file_extensions() const override { return "ws,wsc,bin"; }
 

src/devices/bus/z88/z88.h

@@ -106,7 +106,6 @@ public:
 	virtual bool is_reset_on_load() const override { return 0; }
 	virtual const char *image_interface() const override { return "z88_cart"; }
 	virtual const char *file_extensions() const override { return "epr,bin"; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 
 	// slot interface overrides
 	virtual std::string get_default_card_software() override;

src/devices/imagedev/bitbngr.h

@@ -29,7 +29,6 @@ public:
 	virtual bool must_be_loaded() const override { return 0; }
 	virtual bool is_reset_on_load() const override { return 0; }
 	virtual const char *file_extensions() const override { return ""; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 
 	void output(UINT8 data);
 	UINT32 input(void *buffer, UINT32 length);

src/devices/imagedev/cassette.h

@@ -70,7 +70,6 @@ public:
 	virtual bool is_reset_on_load() const override { return 0; }
 	virtual const char *image_interface() const override { return m_interface; }
 	virtual const char *file_extensions() const override { return m_extension_list; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 
 	// specific implementation
 	cassette_state get_state() { return m_state; }

src/devices/imagedev/floppy.h

@@ -93,7 +93,6 @@ public:
 	virtual bool must_be_loaded() const override { return false; }
 	virtual bool is_reset_on_load() const override { return false; }
 	virtual const char *file_extensions() const override { return extension_list; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 	void setup_write(floppy_image_format_t *output_format);
 
 	void setup_load_cb(load_cb cb);

src/devices/imagedev/midiin.h

@@ -43,7 +43,6 @@ public:
 	virtual bool is_reset_on_load() const override { return 0; }
 	virtual const char *file_extensions() const override { return "mid"; }
 	virtual bool core_opens_image_file() const override { return FALSE; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 
 protected:
 	// device-level overrides

src/devices/imagedev/midiout.h

@@ -46,7 +46,6 @@ public:
 	virtual bool is_reset_on_load() const override { return 0; }
 	virtual const char *file_extensions() const override { return "mid"; }
 	virtual bool core_opens_image_file() const override { return FALSE; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 
 	virtual void tx(UINT8 state) { rx_w(state); }
 

src/devices/imagedev/printer.h

@@ -42,7 +42,6 @@ public:
 	virtual bool must_be_loaded() const override { return 0; }
 	virtual bool is_reset_on_load() const override { return 0; }
 	virtual const char *file_extensions() const override { return "prn"; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 
 	// specific implementation
 

src/devices/imagedev/snapquik.h

@@ -37,7 +37,6 @@ public:
 	virtual bool is_reset_on_load() const override { return 0; }
 	virtual const char *image_interface() const override { return m_interface; }
 	virtual const char *file_extensions() const override { return m_file_extensions; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 
 	TIMER_CALLBACK_MEMBER(process_snapshot_or_quickload);
 	void set_handler(snapquick_load_delegate load, const char *ext, seconds_t sec) { m_load = load; m_file_extensions = ext; m_delay_seconds = sec; };

src/devices/machine/hp_taco.h

@@ -55,7 +55,6 @@ public:
 	virtual bool must_be_loaded() const override { return false; }
 	virtual bool is_reset_on_load() const override { return false; }
 	virtual const char *file_extensions() const override;
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 
 		// Tape position, 1 unit = 1 inch / (968 * 1024)
 		typedef INT32 tape_pos_t;

src/devices/machine/smartmed.h

@@ -213,7 +213,6 @@ public:
 	virtual bool is_reset_on_load() const override { return 0; }
 	virtual const char *image_interface() const override { return "sm_memc"; }
 	virtual const char *file_extensions() const override { return "smc"; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 
 	virtual bool call_load() override;
 	virtual void call_unload() override;

src/emu/diimage.h

@@ -162,7 +162,7 @@ public:
 	virtual bool is_reset_on_load() const = 0;
 	virtual const char *image_interface() const { return nullptr; }
 	virtual const char *file_extensions() const = 0;
-	virtual const option_guide *create_option_guide() const = 0;
+	virtual const option_guide *create_option_guide() const { return nullptr; }
 
 	const image_device_format *device_get_indexed_creatable_format(int index) const { if (index < m_formatlist.size()) return m_formatlist.at(index).get(); else return nullptr;  }
 	const image_device_format *device_get_named_creatable_format(const char *format_name);

src/mame/drivers/apexc.cpp

@@ -86,7 +86,6 @@ public:
 	virtual bool is_reset_on_load() const override { return 1; }
 	virtual const char *image_interface() const override { return nullptr; }
 	virtual const char *file_extensions() const override { return "apc"; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 
 	virtual bool call_load() override;
 	virtual void call_unload() override;
@@ -215,7 +214,6 @@ public:
 	virtual bool is_reset_on_load() const override { return 0; }
 	virtual const char *image_interface() const override { return nullptr; }
 	virtual const char *file_extensions() const override { return "tap"; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 protected:
 	// device-level overrides
 	virtual void device_config_complete() override { update_names(); }
@@ -249,7 +247,6 @@ public:
 	virtual bool is_reset_on_load() const override { return 0; }
 	virtual const char *image_interface() const override { return nullptr; }
 	virtual const char *file_extensions() const override { return "tap"; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 protected:
 	// device-level overrides
 	virtual void device_config_complete() override { update_names(); }

src/mame/drivers/pdp1.cpp

@@ -679,7 +679,6 @@ public:
 	virtual bool is_reset_on_load() const override { return 0; }
 	virtual const char *image_interface() const override { return nullptr; }
 	virtual const char *file_extensions() const override { return "tap,rim"; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 
 	virtual bool call_load() override;
 	virtual void call_unload() override;
@@ -714,7 +713,6 @@ public:
 	virtual bool is_reset_on_load() const override { return 0; }
 	virtual const char *image_interface() const override { return nullptr; }
 	virtual const char *file_extensions() const override { return "tap,rim"; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 
 	virtual bool call_load() override;
 	virtual void call_unload() override;
@@ -750,8 +748,7 @@ public:
 	virtual bool is_reset_on_load() const override { return 0; }
 	virtual const char *image_interface() const override { return nullptr; }
 	virtual const char *file_extensions() const override { return "typ"; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
-
+	
 	virtual bool call_load() override;
 	virtual void call_unload() override;
 protected:
@@ -785,8 +782,7 @@ public:
 	virtual bool is_reset_on_load() const override { return 0; }
 	virtual const char *image_interface() const override { return nullptr; }
 	virtual const char *file_extensions() const override { return "drm"; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
-
+	
 	virtual bool call_load() override;
 	virtual void call_unload() override;
 protected:

src/mame/drivers/tm990189.cpp

@@ -441,7 +441,6 @@ public:
 	virtual bool is_reset_on_load() const override { return 0; }
 	virtual const char *image_interface() const override { return nullptr; }
 	virtual const char *file_extensions() const override { return ""; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 
 	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
 

src/mame/drivers/tx0.cpp

@@ -369,7 +369,6 @@ public:
 	virtual bool is_reset_on_load() const override { return 0; }
 	virtual const char *image_interface() const override { return nullptr; }
 	virtual const char *file_extensions() const override { return "tap,rim"; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 
 	virtual bool call_load() override;
 	virtual void call_unload() override;
@@ -404,7 +403,6 @@ public:
 	virtual bool is_reset_on_load() const override { return 0; }
 	virtual const char *image_interface() const override { return nullptr; }
 	virtual const char *file_extensions() const override { return "tap,rim"; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 
 	virtual bool call_load() override;
 	virtual void call_unload() override;
@@ -440,7 +438,6 @@ public:
 	virtual bool is_reset_on_load() const override { return 0; }
 	virtual const char *image_interface() const override { return nullptr; }
 	virtual const char *file_extensions() const override { return "typ"; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 
 	virtual bool call_load() override;
 	virtual void call_unload() override;
@@ -475,7 +472,6 @@ public:
 	virtual bool is_reset_on_load() const override { return 0; }
 	virtual const char *image_interface() const override { return nullptr; }
 	virtual const char *file_extensions() const override { return "tap"; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 
 	virtual bool call_load() override;
 	virtual void call_unload() override;

src/mame/includes/apollo.h

@@ -365,7 +365,6 @@ public:
 	virtual bool is_reset_on_load() const override { return 0; }
 	virtual const char *image_interface() const override { return nullptr; }
 	virtual const char *file_extensions() const override { return "ani,bin"; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 
 	DECLARE_WRITE16_MEMBER(write);
 	DECLARE_READ16_MEMBER(read);

src/mame/includes/hp48.h

@@ -192,7 +192,6 @@ public:
 	virtual bool is_reset_on_load() const override { return 0; }
 	virtual const char *image_interface() const override { return nullptr; }
 	virtual const char *file_extensions() const override { return "crd"; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 
 	virtual bool call_load() override;
 	virtual void call_unload() override;

src/mame/machine/coco_vhd.h

@@ -38,8 +38,7 @@ public:
 	virtual bool is_reset_on_load() const override { return 0; }
 	virtual const char *image_interface() const override { return nullptr; }
 	virtual const char *file_extensions() const override { return "vhd"; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
-
+	
 	// specific implementation
 	DECLARE_READ8_MEMBER(read) { return read(offset); }
 	DECLARE_WRITE8_MEMBER(write) { write(offset, data); }

src/mame/machine/microdrv.h

@@ -61,7 +61,6 @@ public:
 	virtual bool is_reset_on_load() const override { return 0; }
 	virtual const char *image_interface() const override { return "ql_cass"; }
 	virtual const char *file_extensions() const override { return "mdv"; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 
 	// specific implementation
 	DECLARE_WRITE_LINE_MEMBER( clk_w );

src/mame/machine/ng_memcard.h

@@ -41,7 +41,6 @@ public:
 	virtual bool must_be_loaded() const override { return false; }
 	virtual bool is_reset_on_load() const override { return false; }
 	virtual const char *file_extensions() const override { return "neo"; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 
 	virtual bool call_load() override;
 	virtual void call_unload() override;

src/mame/machine/pce220_ser.h

@@ -40,7 +40,6 @@ public:
 	virtual bool is_reset_on_load() const override { return 0; }
 	virtual const char *image_interface() const override { return nullptr; }
 	virtual const char *file_extensions() const override { return "txt,ihx"; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 
 	// specific implementation
 	UINT8 in_xin(void) { return m_xin & 0x01; }

src/mame/machine/x68k_hdc.h

@@ -94,7 +94,6 @@ public:
 	virtual bool is_reset_on_load() const override { return 0; }
 	virtual const char *image_interface() const override { return nullptr; }
 	virtual const char *file_extensions() const override { return "hdf"; }
-	virtual const option_guide *create_option_guide() const override { return nullptr; }
 	virtual bool call_create(int format_type, util::option_resolution *format_options) override;
 
 	DECLARE_WRITE16_MEMBER( hdc_w );