Revert "Use true/false if type used is bool (nw)"

This reverts commit dbd07cef38.

src/devices/cpu/mcs48/mcs48.cpp

@@ -954,7 +954,7 @@ void mcs48_cpu_device::device_start()
 	m_t1_history = 0;
 	m_dbbi = 0;
 	m_dbbo = 0;
-	m_irq_state = false;
+	m_irq_state = 0;
 
 	/* FIXME: Current implementation suboptimal */
 	m_ea = (m_int_rom_size ? 0 : 1);

src/devices/imagedev/bitbngr.h

@@ -23,11 +23,11 @@ public:
 
 	// image device
 	virtual iodevice_t image_type() const override { return IO_SERIAL; }
-	virtual bool is_readable()  const override { return true; }
-	virtual bool is_writeable() const override { return true; }
-	virtual bool is_creatable() const override { return true; }
-	virtual bool must_be_loaded() const override { return false; }
-	virtual bool is_reset_on_load() const override { return false; }
+	virtual bool is_readable()  const override { return 1; }
+	virtual bool is_writeable() const override { return 1; }
+	virtual bool is_creatable() const override { return 1; }
+	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 ""; }
 
 	void output(uint8_t data);

src/devices/imagedev/cassette.h

@@ -64,11 +64,11 @@ public:
 
 	virtual iodevice_t image_type() const override { return IO_CASSETTE; }
 
-	virtual bool is_readable()  const override { return true; }
-	virtual bool is_writeable() const override { return true; }
-	virtual bool is_creatable() const override { return true; }
-	virtual bool must_be_loaded() const override { return false; }
-	virtual bool is_reset_on_load() const override { return false; }
+	virtual bool is_readable()  const override { return 1; }
+	virtual bool is_writeable() const override { return 1; }
+	virtual bool is_creatable() const override { return 1; }
+	virtual bool must_be_loaded() const override { return 0; }
+	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; }
 

src/devices/imagedev/chd_cd.h

@@ -38,11 +38,11 @@ public:
 
 	virtual iodevice_t image_type() const override { return IO_CDROM; }
 
-	virtual bool is_readable()  const override { return true; }
-	virtual bool is_writeable() const override { return false; }
-	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 false; }
+	virtual bool is_readable()  const override { return 1; }
+	virtual bool is_writeable() const override { return 0; }
+	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 0; }
 	virtual const char *image_interface() const override { return m_interface; }
 	virtual const char *file_extensions() const override { return m_extension_list; }
 

src/devices/imagedev/diablo.h

@@ -38,11 +38,11 @@ public:
 
 	virtual iodevice_t image_type() const override { return IO_HARDDISK; }
 
-	virtual bool is_readable()  const override { return true; }
-	virtual bool is_writeable() const override { return true; }
-	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 false; }
+	virtual bool is_readable()  const override { return 1; }
+	virtual bool is_writeable() const override { return 1; }
+	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 0; }
 	virtual const char *image_interface() const override { return m_interface; }
 	virtual const char *file_extensions() const override { return "chd,dsk"; }
 	virtual const util::option_guide &create_option_guide() const override;

src/devices/imagedev/flopdrv.h

@@ -107,11 +107,11 @@ public:
 
 	virtual iodevice_t image_type() const override { return IO_FLOPPY; }
 
-	virtual bool is_readable()  const override { return true; }
-	virtual bool is_writeable() const override { return true; }
+	virtual bool is_readable()  const override { return 1; }
+	virtual bool is_writeable() const override { return 1; }
 	virtual bool is_creatable() const override;
-	virtual bool must_be_loaded() const override { return false; }
-	virtual bool is_reset_on_load() const override { return false; }
+	virtual bool must_be_loaded() const override { return 0; }
+	virtual bool is_reset_on_load() const override { return 0; }
 	virtual const char *image_interface() const override;
 	virtual const char *file_extensions() const override { return m_extension_list; }
 	virtual const util::option_guide &create_option_guide() const override { return floppy_option_guide; }

src/devices/imagedev/harddriv.h

@@ -40,11 +40,11 @@ public:
 
 	virtual iodevice_t image_type() const override { return IO_HARDDISK; }
 
-	virtual bool is_readable()  const override { return true; }
-	virtual bool is_writeable() const override { return true; }
-	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 false; }
+	virtual bool is_readable()  const override { return 1; }
+	virtual bool is_writeable() const override { return 1; }
+	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 0; }
 	virtual const char *image_interface() const override { return m_interface; }
 	virtual const char *file_extensions() const override { return "chd,hd"; }
 	virtual const util::option_guide &create_option_guide() const override;

src/devices/imagedev/midiin.h

@@ -36,11 +36,11 @@ public:
 
 	// image device
 	virtual iodevice_t image_type() const override { return IO_MIDIIN; }
-	virtual bool is_readable()  const override { return true; }
-	virtual bool is_writeable() const override { return false; }
-	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 false; }
+	virtual bool is_readable()  const override { return 1; }
+	virtual bool is_writeable() const override { return 0; }
+	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 0; }
 	virtual const char *file_extensions() const override { return "mid"; }
 	virtual bool core_opens_image_file() const override { return false; }
 

src/devices/imagedev/midiout.h

@@ -39,11 +39,11 @@ public:
 
 	// image device
 	virtual iodevice_t image_type() const override { return IO_MIDIOUT; }
-	virtual bool is_readable()  const override { return false; }
-	virtual bool is_writeable() const override { return true; }
-	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 false; }
+	virtual bool is_readable()  const override { return 0; }
+	virtual bool is_writeable() const override { return 1; }
+	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 0; }
 	virtual const char *file_extensions() const override { return "mid"; }
 	virtual bool core_opens_image_file() const override { return false; }
 

src/devices/imagedev/printer.h

@@ -36,11 +36,11 @@ public:
 
 	// image device
 	virtual iodevice_t image_type() const override { return IO_PRINTER; }
-	virtual bool is_readable()  const override { return false; }
-	virtual bool is_writeable() const override { return true; }
-	virtual bool is_creatable() const override { return true; }
-	virtual bool must_be_loaded() const override { return false; }
-	virtual bool is_reset_on_load() const override { return false; }
+	virtual bool is_readable()  const override { return 0; }
+	virtual bool is_writeable() const override { return 1; }
+	virtual bool is_creatable() const override { return 1; }
+	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"; }
 
 	// specific implementation

src/devices/imagedev/snapquik.h

@@ -32,11 +32,11 @@ public:
 	virtual const software_list_loader &get_software_list_loader() const override { return image_software_list_loader::instance(); }
 	virtual iodevice_t image_type() const override { return IO_SNAPSHOT; }
 
-	virtual bool is_readable()  const override { return true; }
-	virtual bool is_writeable() const override { return false; }
-	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 false; }
+	virtual bool is_readable()  const override { return 1; }
+	virtual bool is_writeable() const override { return 0; }
+	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 0; }
 	virtual const char *image_interface() const override { return m_interface; }
 	virtual const char *file_extensions() const override { return m_file_extensions; }
 

src/devices/sound/samples.cpp

@@ -249,8 +249,8 @@ void samples_device::device_start()
 		chan.source = nullptr;
 		chan.source_num = -1;
 		chan.step = 0;
-		chan.loop = false;
-		chan.paused = false;
+		chan.loop = 0;
+		chan.paused = 0;
 
 		// register with the save state system
 		save_item(NAME(chan.source_length), channel);

src/frontend/mame/ui/ui.cpp

@@ -672,7 +672,7 @@ void mame_ui_manager::set_show_fps(bool show)
 	m_showfps = show;
 	if (!show)
 	{
-		m_showfps = false;
+		m_showfps = 0;
 		m_showfps_end = 0;
 	}
 }

src/lib/formats/ipf_dsk.cpp

@@ -484,7 +484,7 @@ bool ipf_format::generate_block_data(const uint8_t *data, const uint8_t *dlimit,
 			if(16*param > tleft)
 				return false;
 			track_write_weak(tpos, 16*param);
-			context = false;
+			context = 0;
 			break;
 
 		default:

src/mame/audio/exidy440.cpp

@@ -775,7 +775,7 @@ void exidy440_sound_device::decode_and_filter_cvsd(uint8_t *input, int bytes, in
 	}
 
 	/* make sure the volume goes smoothly to 0 over the last 512 samples */
-	if (IS_ENABLED(FADE_TO_ZERO))
+	if (FADE_TO_ZERO)
 	{
 		int16_t *data;