mc6845: More consistent identification of HD6845S variant (nw)

src/devices/bus/acorn/system/vdu40.cpp

@@ -33,7 +33,7 @@ void acorn_vdu40_device::device_add_mconfig(machine_config &config)
 
 	PALETTE(config, "palette").set_entries(8);
 
-	HD6845(config, m_crtc, 12_MHz_XTAL / 6);
+	HD6845S(config, m_crtc, 12_MHz_XTAL / 6); // "MC6845S" on schematics
 	m_crtc->set_screen("screen");
 	m_crtc->set_show_border_area(false);
 	m_crtc->set_char_width(12);

src/devices/bus/acorn/system/vdu80.cpp

@@ -97,7 +97,7 @@ void acorn_vdu80_device::device_add_mconfig(machine_config &config)
 	GFXDECODE(config, "gfxdecode", m_palette, gfx_acorn_vdu80);
 	PALETTE(config, m_palette, palette_device::MONOCHROME);
 
-	H46505(config, m_crtc, 2_MHz_XTAL);
+	HD6845S(config, m_crtc, 2_MHz_XTAL); // "46505" on schematics (variant not verified)
 	m_crtc->set_screen("screen");
 	m_crtc->set_show_border_area(false);
 	m_crtc->set_char_width(6);

src/devices/bus/c64/xl80.cpp

@@ -126,7 +126,7 @@ GFXDECODE_END
 void c64_xl80_device::device_add_mconfig(machine_config &config)
 {
 	screen_device &screen(SCREEN(config, MC6845_SCREEN_TAG, SCREEN_TYPE_RASTER, rgb_t::white()));
-	screen.set_screen_update(HD46505SP_TAG, FUNC(h46505_device::screen_update));
+	screen.set_screen_update(HD46505SP_TAG, FUNC(hd6845s_device::screen_update));
 	screen.set_size(80*8, 24*8);
 	screen.set_visarea(0, 80*8-1, 0, 24*8-1);
 	screen.set_refresh_hz(50);
@@ -134,7 +134,7 @@ void c64_xl80_device::device_add_mconfig(machine_config &config)
 	GFXDECODE(config, "gfxdecode", m_palette, gfx_c64_xl80);
 	PALETTE(config, m_palette, palette_device::MONOCHROME);
 
-	H46505(config, m_crtc, XTAL(14'318'181) / 8);
+	HD6845S(config, m_crtc, XTAL(14'318'181) / 8);
 	m_crtc->set_screen(MC6845_SCREEN_TAG);
 	m_crtc->set_show_border_area(true);
 	m_crtc->set_char_width(8);

src/devices/bus/c64/xl80.h

@@ -49,7 +49,7 @@ protected:
 private:
 	MC6845_UPDATE_ROW( crtc_update_row );
 
-	required_device<h46505_device> m_crtc;
+	required_device<hd6845s_device> m_crtc;
 	required_device<palette_device> m_palette;
 	required_memory_region m_char_rom;
 	optional_shared_ptr<uint8_t> m_ram;

src/devices/bus/mtx/sdx.cpp

@@ -154,12 +154,12 @@ void mtx_sdxcpm_device::device_add_mconfig(machine_config &config)
 	m_screen->set_refresh_hz(50);
 	m_screen->set_size(960, 313);
 	m_screen->set_visarea(00, 640 - 1, 0, 240 - 1);
-	m_screen->set_screen_update("crtc", FUNC(hd6845_device::screen_update));
+	m_screen->set_screen_update("crtc", FUNC(mc6845_device::screen_update));
 
 	GFXDECODE(config, "gfxdecode", "palette", gfx_mtx_sdx);
 	PALETTE(config, "palette", palette_device::RGB_3BIT);
 
-	HD6845(config, m_crtc, 15_MHz_XTAL / 8);
+	MC6845(config, m_crtc, 15_MHz_XTAL / 8);
 	m_crtc->set_screen("screen");
 	m_crtc->set_show_border_area(false);
 	m_crtc->set_char_width(8);

src/devices/bus/svi3x8/slot/sv806.cpp

@@ -44,11 +44,11 @@ void sv806_device::device_add_mconfig(machine_config &config)
 	screen_device &screen(SCREEN(config, "80col", SCREEN_TYPE_RASTER));
 	screen.set_color(rgb_t::green());
 	screen.set_raw((XTAL(12'000'000) / 6) * 8, 864, 0, 640, 317, 0, 192);
-	screen.set_screen_update("crtc", FUNC(hd6845_device::screen_update));
+	screen.set_screen_update("crtc", FUNC(hd6845s_device::screen_update));
 
 	PALETTE(config, m_palette, palette_device::MONOCHROME);
 
-	HD6845(config, m_crtc, XTAL(12'000'000) / 6);
+	HD6845S(config, m_crtc, XTAL(12'000'000) / 6); // HD6845 (variant not verified)
 	m_crtc->set_screen("80col");
 	m_crtc->set_show_border_area(false);
 	m_crtc->set_char_width(8);

src/devices/bus/svi3x8/slot/sv806.h

@@ -41,7 +41,7 @@ protected:
 private:
 	MC6845_UPDATE_ROW(crtc_update_row);
 
-	required_device<hd6845_device> m_crtc;
+	required_device<hd6845s_device> m_crtc;
 	required_device<palette_device> m_palette;
 	required_memory_region m_gfx;
 

src/devices/bus/vic20/videopak.cpp

@@ -100,7 +100,7 @@ GFXDECODE_END
 void vic20_video_pak_device::device_add_mconfig(machine_config &config)
 {
 	screen_device &screen(SCREEN(config, MC6845_SCREEN_TAG, SCREEN_TYPE_RASTER, rgb_t::white()));
-	screen.set_screen_update(MC6845_TAG, FUNC(h46505_device::screen_update));
+	screen.set_screen_update(MC6845_TAG, FUNC(mc6845_device::screen_update));
 	screen.set_size(80*8, 24*8);
 	screen.set_visarea(0, 80*8-1, 0, 24*8-1);
 	screen.set_refresh_hz(50);
@@ -108,7 +108,7 @@ void vic20_video_pak_device::device_add_mconfig(machine_config &config)
 	GFXDECODE(config, "gfxdecode", m_palette, gfx_vic20_video_pak);
 	PALETTE(config, m_palette, palette_device::MONOCHROME);
 
-	H46505(config, m_crtc, XTAL(14'318'181) / 8);
+	MC6845(config, m_crtc, XTAL(14'318'181) / 8); // HD46505RP or similar
 	m_crtc->set_screen(MC6845_SCREEN_TAG);
 	m_crtc->set_show_border_area(true);
 	m_crtc->set_char_width(8);

src/devices/bus/vic20/videopak.h

@@ -48,7 +48,7 @@ protected:
 private:
 	MC6845_UPDATE_ROW( crtc_update_row );
 
-	required_device<h46505_device> m_crtc;
+	required_device<mc6845_device> m_crtc;
 	required_device<palette_device> m_palette;
 	required_memory_region m_char_rom;
 	optional_shared_ptr<uint8_t> m_videoram;

src/devices/video/mc6845.cpp

@@ -7,15 +7,17 @@
     The following variations exist that are different in
     functionality and not just in speed rating(1):
         * Motorola 6845, 6845-1
-        * Hitachi 46505
+        * Hitachi 6845 (= 46505R), 6845S (= 46505S), 6345/6445
         * Rockwell 6545, 6545-1 (= Synertek SY6545-1)
         * MOS Technology 6545-1
 
     (1) as per the document at
     http://www.6502.org/users/andre/hwinfo/crtc/diffs.html
 
-    The various speed rated devices are identified by a letter,
+    The various speed rated devices are usually identified by a
-    for example M68A45, M68B45, etc.
+    letter, e.g. MC68A45, MC68B45. Hitachi's older HD46505 numbering
+    identifies speed by numerical suffixes (-1, -2), which other
+    manufacturers use to identify functional variants instead.
 
     The chip is originally designed by Hitachi, not by Motorola.
 
@@ -54,8 +56,7 @@ DEFINE_DEVICE_TYPE(MC6845,   mc6845_device,   "mc6845",   "Motorola MC6845 CRTC"
 DEFINE_DEVICE_TYPE(MC6845_1, mc6845_1_device, "mc6845_1", "Motorola MC6845-1 CRTC")
 DEFINE_DEVICE_TYPE(R6545_1,  r6545_1_device,  "r6545_1",  "Rockwell R6545-1 CRTC")
 DEFINE_DEVICE_TYPE(C6545_1,  c6545_1_device,  "c6545_1",  "C6545-1 CRTC")
-DEFINE_DEVICE_TYPE(H46505,   h46505_device,   "h46505",   "Hitachi HD46505 CRTC")
+DEFINE_DEVICE_TYPE(HD6845S,  hd6845s_device,  "hd6845s",  "Hitachi HD6845S CRTC") // same as HD46505S
-DEFINE_DEVICE_TYPE(HD6845,   hd6845_device,   "hd6845",   "Hitachi HD6845 CRTC")
 DEFINE_DEVICE_TYPE(SY6545_1, sy6545_1_device, "sy6545_1", "Synertek SY6545-1 CRTC")
 DEFINE_DEVICE_TYPE(SY6845E,  sy6845e_device,  "sy6845e",  "Synertek SY6845E CRTC")
 DEFINE_DEVICE_TYPE(HD6345,   hd6345_device,   "hd6345",   "Hitachi HD6345 CRTC")
@@ -1196,20 +1197,7 @@ void r6545_1_device::device_start()
 }
 
 
-void h46505_device::device_start()
+void hd6845s_device::device_start()
-{
-	mc6845_device::device_start();
-
-	m_supports_disp_start_addr_r = false;
-	m_supports_vert_sync_width = false;
-	m_supports_status_reg_d5 = false;
-	m_supports_status_reg_d6 = false;
-	m_supports_status_reg_d7 = false;
-	m_supports_transparent = false;
-}
-
-
-void hd6845_device::device_start()
 {
 	mc6845_device::device_start();
 
@@ -1417,9 +1405,8 @@ void mc6845_device::device_reset()
 
 
 void r6545_1_device::device_reset() { mc6845_device::device_reset(); }
-void h46505_device::device_reset() { mc6845_device::device_reset(); }
 void mc6845_1_device::device_reset() { mc6845_device::device_reset(); }
-void hd6845_device::device_reset() { mc6845_device::device_reset(); }
+void hd6845s_device::device_reset() { mc6845_device::device_reset(); }
 void c6545_1_device::device_reset() { mc6845_device::device_reset(); }
 void sy6545_1_device::device_reset() { mc6845_device::device_reset(); }
 void sy6845e_device::device_reset() { mc6845_device::device_reset(); }
@@ -1463,20 +1450,14 @@ r6545_1_device::r6545_1_device(const machine_config &mconfig, const char *tag, d
 }
 
 
-h46505_device::h46505_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
-	: mc6845_device(mconfig, H46505, tag, owner, clock)
-{
-}
-
-
 mc6845_1_device::mc6845_1_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
 	: mc6845_device(mconfig, MC6845_1, tag, owner, clock)
 {
 }
 
 
-hd6845_device::hd6845_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
+hd6845s_device::hd6845s_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
-	: mc6845_device(mconfig, HD6845, tag, owner, clock)
+	: mc6845_device(mconfig, HD6845S, tag, owner, clock)
 {
 }
 

src/devices/video/mc6845.h

@@ -322,20 +322,10 @@ protected:
 	virtual void device_reset() override;
 };
 
-class h46505_device : public mc6845_device
+class hd6845s_device : public mc6845_device
 {
 public:
-	h46505_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+	hd6845s_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
-
-protected:
-	virtual void device_start() override;
-	virtual void device_reset() override;
-};
-
-class hd6845_device : public mc6845_device
-{
-public:
-	hd6845_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
 
 protected:
 	virtual void device_start() override;
@@ -482,8 +472,7 @@ DECLARE_DEVICE_TYPE(MC6845,   mc6845_device)
 DECLARE_DEVICE_TYPE(MC6845_1, mc6845_1_device)
 DECLARE_DEVICE_TYPE(R6545_1,  r6545_1_device)
 DECLARE_DEVICE_TYPE(C6545_1,  c6545_1_device)
-DECLARE_DEVICE_TYPE(H46505,   h46505_device)
+DECLARE_DEVICE_TYPE(HD6845S,  hd6845s_device)
-DECLARE_DEVICE_TYPE(HD6845,   hd6845_device)
 DECLARE_DEVICE_TYPE(SY6545_1, sy6545_1_device)
 DECLARE_DEVICE_TYPE(SY6845E,  sy6845e_device)
 DECLARE_DEVICE_TYPE(HD6345,   hd6345_device)

src/mame/drivers/albazg.cpp

@@ -384,7 +384,7 @@ void albazg_state::yumefuda(machine_config &config)
 	screen.set_visarea_full();
 	screen.set_screen_update(FUNC(albazg_state::screen_update_yumefuda));
 
-	h46505_device &crtc(H46505(config, "crtc", MASTER_CLOCK/16));   /* hand tuned to get ~60 fps */
+	hd6845s_device &crtc(HD6845S(config, "crtc", MASTER_CLOCK/16));   /* hand tuned to get ~60 fps */
 	crtc.set_screen("screen");
 	crtc.set_show_border_area(false);
 	crtc.set_char_width(8);

src/mame/drivers/alphatro.cpp

@@ -759,7 +759,7 @@ MACHINE_CONFIG_START(alphatro_state::alphatro)
 	m_dmac->out_iow_cb<2>().set(m_fdc, FUNC(upd765a_device::dma_w));
 	m_dmac->out_tc_cb().set(m_fdc, FUNC(upd765a_device::tc_line_w));
 
-	HD6845(config, m_crtc, 16_MHz_XTAL / 8);
+	HD6845S(config, m_crtc, 16_MHz_XTAL / 8);
 	m_crtc->set_screen("screen");
 	m_crtc->set_show_border_area(false);
 	m_crtc->set_char_width(8);

src/mame/drivers/amstrad.cpp

@@ -931,7 +931,7 @@ MACHINE_CONFIG_START(amstrad_state::amstrad_base)
 
 	PALETTE(config, m_palette, FUNC(amstrad_state::amstrad_cpc_palette), 32);
 
-	HD6845(config, m_crtc, 16_MHz_XTAL / 16);
+	HD6845S(config, m_crtc, 16_MHz_XTAL / 16);
 	m_crtc->set_screen(nullptr);
 	m_crtc->set_show_border_area(false);
 	m_crtc->set_char_width(16);

src/mame/drivers/amust.cpp

@@ -455,7 +455,7 @@ void amust_state::amust(machine_config &config)
 	BEEP(config, m_beep, 800).add_route(ALL_OUTPUTS, "mono", 0.50);
 
 	/* Devices */
-	h46505_device &crtc(H46505(config, "crtc", XTAL(14'318'181) / 8));
+	hd6845s_device &crtc(HD6845S(config, "crtc", XTAL(14'318'181) / 8));
 	crtc.set_screen("screen");
 	crtc.set_show_border_area(false);
 	crtc.set_char_width(8);

src/mame/drivers/apricot.cpp

@@ -103,7 +103,7 @@ private:
 	required_device<i8086_cpu_device> m_cpu;
 	required_device<i8089_device> m_iop;
 	required_device<ram_device> m_ram;
-	required_device<hd6845_device> m_crtc;
+	required_device<hd6845s_device> m_crtc;
 	required_device<i8255_device> m_ppi;
 	required_device<pic8259_device> m_pic;
 	required_device<pit8253_device> m_pit;
@@ -347,8 +347,8 @@ void apricot_state::apricot_io(address_map &map)
 	map(0x62, 0x62).r(FUNC(apricot_state::sio_ca_r)).w(m_sio, FUNC(z80sio_device::ca_w)).umask16(0x00ff);
 	map(0x64, 0x64).r(FUNC(apricot_state::sio_db_r)).w(m_sio, FUNC(z80sio_device::db_w)).umask16(0x00ff);
 	map(0x66, 0x66).r(FUNC(apricot_state::sio_cb_r)).w(m_sio, FUNC(z80sio_device::cb_w)).umask16(0x00ff);
-	map(0x68, 0x68).mirror(0x04).w(m_crtc, FUNC(hd6845_device::address_w));
+	map(0x68, 0x68).mirror(0x04).w(m_crtc, FUNC(hd6845s_device::address_w));
-	map(0x6a, 0x6a).mirror(0x04).rw(m_crtc, FUNC(hd6845_device::register_r), FUNC(hd6845_device::register_w));
+	map(0x6a, 0x6a).mirror(0x04).rw(m_crtc, FUNC(hd6845s_device::register_r), FUNC(hd6845s_device::register_w));
 	map(0x70, 0x70).mirror(0x04).w(FUNC(apricot_state::i8089_ca1_w));
 	map(0x72, 0x72).mirror(0x04).w(FUNC(apricot_state::i8089_ca2_w));
 	map(0x78, 0x7f).noprw(); // unavailable
@@ -389,7 +389,7 @@ void apricot_state::apricot(machine_config &config)
 
 	PALETTE(config, m_palette, palette_device::MONOCHROME_HIGHLIGHT);
 
-	HD6845(config, m_crtc, 15_MHz_XTAL / 10);
+	HD6845S(config, m_crtc, 15_MHz_XTAL / 10);
 	m_crtc->set_screen("screen");
 	m_crtc->set_show_border_area(false);
 	m_crtc->set_char_width(10);

src/mame/drivers/b16.cpp

@@ -282,7 +282,7 @@ void b16_state::b16(machine_config &config)
 	screen.set_visarea_full();
 	screen.set_palette(m_palette);
 
-	H46505(config, m_mc6845, XTAL(14'318'181)/5);    /* unknown clock, hand tuned to get ~60 fps */
+	MC6845(config, m_mc6845, XTAL(14'318'181)/5);    /* unknown variant, unknown clock, hand tuned to get ~60 fps */
 	m_mc6845->set_screen("screen");
 	m_mc6845->set_show_border_area(false);
 	m_mc6845->set_char_width(8);

src/mame/drivers/bbc.cpp

@@ -132,8 +132,8 @@ void bbc_state::bbca_mem(address_map &map)
 	map(0x8000, 0xbfff).rw(FUNC(bbc_state::bbc_paged_r), FUNC(bbc_state::bbc_paged_w));                               //    8000-bfff                 Paged ROM/RAM
 	map(0xc000, 0xffff).rom().region("mos", 0);                                                                       //    c000-fbff                 OS ROM
 	map(0xfe00, 0xfeff).r(FUNC(bbc_state::bbc_fe_r));                                                                 //    fe00-feff                 SHEILA Address Page
-	map(0xfe00, 0xfe00).mirror(0x06).rw(m_hd6845, FUNC(hd6845_device::status_r), FUNC(hd6845_device::address_w));     //    fe00-fe07  6845 CRTC      Video controller
+	map(0xfe00, 0xfe00).mirror(0x06).rw(m_hd6845, FUNC(hd6845s_device::status_r), FUNC(hd6845s_device::address_w));     //    fe00-fe07  6845 CRTC      Video controller
-	map(0xfe01, 0xfe01).mirror(0x06).rw(m_hd6845, FUNC(hd6845_device::register_r), FUNC(hd6845_device::register_w));
+	map(0xfe01, 0xfe01).mirror(0x06).rw(m_hd6845, FUNC(hd6845s_device::register_r), FUNC(hd6845s_device::register_w));
 	map(0xfe08, 0xfe0f).rw(m_acia, FUNC(acia6850_device::read), FUNC(acia6850_device::write));                        //    fe08-fe0f  6850 ACIA      Serial controller
 	map(0xfe10, 0xfe17).w(FUNC(bbc_state::serial_ula_w));                                                             //    fe10-fe17  Serial ULA     Serial system chip
 	map(0xfe20, 0xfe2f).w(FUNC(bbc_state::video_ula_w));                                                              // W: fe20-fe2f  Video ULA      Video system chip
@@ -149,8 +149,8 @@ void bbc_state::bbc_base(address_map &map)
 	map(0xfc00, 0xfcff).rw(m_1mhzbus, FUNC(bbc_1mhzbus_slot_device::fred_r), FUNC(bbc_1mhzbus_slot_device::fred_w));  //    fc00-fcff                 FRED Address Page
 	map(0xfd00, 0xfdff).rw(m_1mhzbus, FUNC(bbc_1mhzbus_slot_device::jim_r), FUNC(bbc_1mhzbus_slot_device::jim_w));    //    fd00-fdff                 JIM Address Page
 	map(0xfe00, 0xfeff).r(FUNC(bbc_state::bbc_fe_r));                                                                 //    fe00-feff                 SHEILA Address Page
-	map(0xfe00, 0xfe00).mirror(0x06).rw(m_hd6845, FUNC(hd6845_device::status_r), FUNC(hd6845_device::address_w));     //    fe00-fe07  6845 CRTC      Video controller
+	map(0xfe00, 0xfe00).mirror(0x06).rw(m_hd6845, FUNC(hd6845s_device::status_r), FUNC(hd6845s_device::address_w));     //    fe00-fe07  6845 CRTC      Video controller
-	map(0xfe01, 0xfe01).mirror(0x06).rw(m_hd6845, FUNC(hd6845_device::register_r), FUNC(hd6845_device::register_w));
+	map(0xfe01, 0xfe01).mirror(0x06).rw(m_hd6845, FUNC(hd6845s_device::register_r), FUNC(hd6845s_device::register_w));
 	map(0xfe08, 0xfe0f).rw(m_acia, FUNC(acia6850_device::read), FUNC(acia6850_device::write));                        //    fe08-fe0f  6850 ACIA      Serial controller
 	map(0xfe10, 0xfe17).w(FUNC(bbc_state::serial_ula_w));                                                             //    fe10-fe17  Serial ULA     Serial system chip
 	map(0xfe18, 0xfe1f).portr("STATID");                                                                              //    fe18-fe1f  INTOFF/STATID  ECONET Interrupt Off / ID No.
@@ -239,8 +239,8 @@ void bbcm_state::bbcm_bankdev(address_map &map)
 	map(0x0000, 0x00ff).mirror(0x400).rw(m_1mhzbus, FUNC(bbc_1mhzbus_slot_device::fred_r), FUNC(bbc_1mhzbus_slot_device::fred_w));    //    fc00-fcff  Master         FRED Address Page
 	map(0x0100, 0x01ff).mirror(0x400).rw(m_1mhzbus, FUNC(bbc_1mhzbus_slot_device::jim_r), FUNC(bbc_1mhzbus_slot_device::jim_w));      //    fd00-fdff  Master         JIM Address Page
 	map(0x0200, 0x02ff).mirror(0x400).r(FUNC(bbc_state::bbc_fe_r));                                                                   //    fe00-feff                 SHEILA Address Page
-	map(0x0200, 0x0200).mirror(0x406).rw(m_hd6845, FUNC(hd6845_device::status_r), FUNC(hd6845_device::address_w));                    //    fe00-fe07  6845 CRTC      Video controller
+	map(0x0200, 0x0200).mirror(0x406).rw(m_hd6845, FUNC(hd6845s_device::status_r), FUNC(hd6845s_device::address_w));                    //    fe00-fe07  6845 CRTC      Video controller
-	map(0x0201, 0x0201).mirror(0x406).rw(m_hd6845, FUNC(hd6845_device::register_r), FUNC(hd6845_device::register_w));
+	map(0x0201, 0x0201).mirror(0x406).rw(m_hd6845, FUNC(hd6845s_device::register_r), FUNC(hd6845s_device::register_w));
 	map(0x0208, 0x020f).mirror(0x400).rw(m_acia, FUNC(acia6850_device::read), FUNC(acia6850_device::write));                          //    fe08-fe0f  6850 ACIA      Serial controller
 	map(0x0210, 0x0217).mirror(0x400).w(FUNC(bbc_state::serial_ula_w));                                                               //    fe10-fe17  Serial ULA     Serial system chip
 	map(0x0218, 0x021f).mirror(0x400).rw(m_upd7002, FUNC(upd7002_device::read), FUNC(upd7002_device::write));                         //    fe18-fe1f  uPD7002        Analogue to digital converter
@@ -269,8 +269,8 @@ void bbcm_state::bbcmet_bankdev(address_map &map)
 	map(0x0000, 0x00ff).mirror(0x400).unmaprw();                                                                                      //    fc00-fcff                 FRED Address Page
 	map(0x0100, 0x01ff).mirror(0x400).unmaprw();                                                                                      //    fd00-fdff                 JIM Address Page
 	map(0x0200, 0x02ff).mirror(0x400).r(FUNC(bbc_state::bbc_fe_r));                                                                   //    fe00-feff                 SHEILA Address Page
-	map(0x0200, 0x0200).mirror(0x406).rw(m_hd6845, FUNC(hd6845_device::status_r), FUNC(hd6845_device::address_w));                    //    fe00-fe07  6845 CRTC      Video controller
+	map(0x0200, 0x0200).mirror(0x406).rw(m_hd6845, FUNC(hd6845s_device::status_r), FUNC(hd6845s_device::address_w));                    //    fe00-fe07  6845 CRTC      Video controller
-	map(0x0201, 0x0201).mirror(0x406).rw(m_hd6845, FUNC(hd6845_device::register_r), FUNC(hd6845_device::register_w));
+	map(0x0201, 0x0201).mirror(0x406).rw(m_hd6845, FUNC(hd6845s_device::register_r), FUNC(hd6845s_device::register_w));
 	map(0x0208, 0x020f).mirror(0x400).r(FUNC(bbc_state::bbc_fe_r));                                                                   //    fe08-fe0f  6850 ACIA      Serial controller
 	map(0x0210, 0x0217).mirror(0x400).w(FUNC(bbc_state::serial_ula_w));                                                               //    fe10-fe17  Serial ULA     Serial system chip
 	map(0x0218, 0x021f).mirror(0x400).r(FUNC(bbc_state::bbc_fe_r));                                                                   //    fe18-fe1f  uPD7002        Analogue to digital converter
@@ -299,8 +299,8 @@ void bbcm_state::bbcmc_bankdev(address_map &map)
 	map(0x0000, 0x00ff).mirror(0x400).rw(m_exp, FUNC(bbc_exp_slot_device::fred_r), FUNC(bbc_exp_slot_device::fred_w));                //    fc00-fcff  Compact        FRED Address Page
 	map(0x0100, 0x01ff).mirror(0x400).rw(m_exp, FUNC(bbc_exp_slot_device::jim_r), FUNC(bbc_exp_slot_device::jim_w));                  //    fd00-fdff  Compact        JIM Address Page
 	map(0x0200, 0x02ff).mirror(0x400).rw(m_exp, FUNC(bbc_exp_slot_device::sheila_r), FUNC(bbc_exp_slot_device::sheila_w));            //    fd00-fdff  Compact        SHEILA Address Page
-	map(0x0200, 0x0200).mirror(0x406).rw(m_hd6845, FUNC(hd6845_device::status_r), FUNC(hd6845_device::address_w));                    //    fe00-fe07  6845 CRTC      Video controller
+	map(0x0200, 0x0200).mirror(0x406).rw(m_hd6845, FUNC(hd6845s_device::status_r), FUNC(hd6845s_device::address_w));                    //    fe00-fe07  6845 CRTC      Video controller
-	map(0x0201, 0x0201).mirror(0x406).rw(m_hd6845, FUNC(hd6845_device::register_r), FUNC(hd6845_device::register_w));
+	map(0x0201, 0x0201).mirror(0x406).rw(m_hd6845, FUNC(hd6845s_device::register_r), FUNC(hd6845s_device::register_w));
 	map(0x0208, 0x020f).mirror(0x400).rw(m_acia, FUNC(acia6850_device::read), FUNC(acia6850_device::write));                          //    fe08-fe0f  6850 ACIA      Serial controller
 	map(0x0210, 0x0217).mirror(0x400).w(FUNC(bbc_state::serial_ula_w));                                                               //    fe10-fe17  Serial ULA     Serial system chip
 	map(0x0220, 0x0223).mirror(0x400).w(FUNC(bbc_state::video_ula_w));                                                                //    fe20-fe23  Video ULA      Video system chip
@@ -846,7 +846,7 @@ void bbc_state::bbca(machine_config &config)
 	/* video hardware */
 	SCREEN(config, m_screen, SCREEN_TYPE_RASTER);
 	m_screen->set_raw(16_MHz_XTAL, 1024, 0, 640, 312, 0, 256);
-	m_screen->set_screen_update("hd6845", FUNC(hd6845_device::screen_update));
+	m_screen->set_screen_update("hd6845", FUNC(hd6845s_device::screen_update));
 
 	PALETTE(config, m_palette, FUNC(bbc_state::bbc_colours), 16);
 
@@ -854,7 +854,7 @@ void bbc_state::bbca(machine_config &config)
 	m_trom->set_screen_size(40, 25, 40);
 
 	/* crtc */
-	HD6845(config, m_hd6845, 16_MHz_XTAL / 8);
+	HD6845S(config, m_hd6845, 16_MHz_XTAL / 8);
 	m_hd6845->set_screen("screen");
 	m_hd6845->set_show_border_area(false);
 	m_hd6845->set_char_width(12);
@@ -1340,7 +1340,7 @@ void bbcm_state::bbcm(machine_config &config)
 	/* video hardware */
 	SCREEN(config, m_screen, SCREEN_TYPE_RASTER);
 	m_screen->set_raw(16_MHz_XTAL, 1024, 0, 640, 312, 0, 256);
-	m_screen->set_screen_update("hd6845", FUNC(hd6845_device::screen_update));
+	m_screen->set_screen_update("hd6845", FUNC(hd6845s_device::screen_update));
 
 	PALETTE(config, m_palette, FUNC(bbc_state::bbc_colours), 16);
 
@@ -1348,7 +1348,7 @@ void bbcm_state::bbcm(machine_config &config)
 	m_trom->set_screen_size(40, 25, 40);
 
 	/* crtc */
-	HD6845(config, m_hd6845, 16_MHz_XTAL / 8);
+	HD6845S(config, m_hd6845, 16_MHz_XTAL / 8);
 	m_hd6845->set_screen("screen");
 	m_hd6845->set_show_border_area(false);
 	m_hd6845->set_char_width(12);

src/mame/drivers/blitz68k.cpp

@@ -1836,7 +1836,7 @@ void blitz68k_state::bankrob(machine_config &config)
 	screen.set_visarea(0, 512-1, 0+4, 256-1-4);
 	screen.set_screen_update(FUNC(blitz68k_state::screen_update_blitz68k));
 
-	H46505(config, m_crtc, XTAL(11'059'200)/4);
+	HD6845S(config, m_crtc, XTAL(11'059'200)/4);
 	m_crtc->set_screen("screen");
 	m_crtc->set_show_border_area(false);
 	m_crtc->set_char_width(4);
@@ -1867,7 +1867,7 @@ void blitz68k_state::bankroba(machine_config &config)
 	screen.set_visarea(0, 512-1, 0+7, 256-1);
 	screen.set_screen_update(FUNC(blitz68k_state::screen_update_blitz68k));
 
-	H46505(config, m_crtc, XTAL(11'059'200)/4);
+	HD6845S(config, m_crtc, XTAL(11'059'200)/4);
 	m_crtc->set_screen("screen");
 	m_crtc->set_show_border_area(false);
 	m_crtc->set_char_width(4);
@@ -1929,7 +1929,7 @@ void blitz68k_state::dualgame(machine_config &config)
 	screen.set_visarea(0, 512-1, 0+4, 256-1-4);
 	screen.set_screen_update(FUNC(blitz68k_state::screen_update_blitz68k));
 
-	H46505(config, m_crtc, XTAL(11'059'200)/4);
+	HD6845S(config, m_crtc, XTAL(11'059'200)/4);
 	m_crtc->set_screen("screen");
 	m_crtc->set_show_border_area(false);
 	m_crtc->set_char_width(4);
@@ -1959,7 +1959,7 @@ void blitz68k_state::hermit(machine_config &config)
 	screen.set_visarea(0, 512-1, 0+4, 256-1-4);
 	screen.set_screen_update(FUNC(blitz68k_state::screen_update_blitz68k));
 
-	H46505(config, m_crtc, XTAL(22'118'400)/8);
+	HD6845S(config, m_crtc, XTAL(22'118'400)/8);
 	m_crtc->set_screen("screen");
 	m_crtc->set_show_border_area(false);
 	m_crtc->set_char_width(4);
@@ -1993,7 +1993,7 @@ void blitz68k_state::maxidbl(machine_config &config)
 	screen.set_visarea_full();
 	screen.set_screen_update(FUNC(blitz68k_state::screen_update_blitz68k_noblit));
 
-	H46505(config, m_crtc, XTAL(11'059'200)/4);
+	HD6845S(config, m_crtc, XTAL(11'059'200)/4);
 	m_crtc->set_screen("screen");
 	m_crtc->set_show_border_area(false);
 	m_crtc->set_char_width(4);

src/mame/drivers/bml3.cpp

@@ -933,7 +933,7 @@ void bml3_state::bml3_common(machine_config &config)
 
 	/* Devices */
 	// CRTC clock should be synchronous with the CPU clock.
-	H46505(config, m_crtc, CPU_CLOCK);
+	HD6845S(config, m_crtc, CPU_CLOCK); // HD46505SP
 	m_crtc->set_screen("screen");
 	m_crtc->set_show_border_area(false);
 	m_crtc->set_char_width(8);

src/mame/drivers/candela.cpp

@@ -487,6 +487,7 @@ INPUT_PORTS_END
  * - Map PIA:S
  * - ROM/RAM paging by using the PIAs and the myriad of 74138s on the board
  * - Vram and screen for the 6845 CRTC
+ * - Check actual clock source for CRTC. An 8MHz UKI crystal is also nearby
  * - Keyboard
  * - Serial port
  * - Floppy controller
@@ -521,7 +522,7 @@ protected:
 	required_device<pia6821_device> m_pia1;
 	required_device<ram_device> m_ram;
 	required_memory_bank m_bank1;
-	required_device<h46505_device> m_crtc;
+	required_device<hd6845s_device> m_crtc;
 };
 
 void can09_state::machine_reset()
@@ -640,8 +641,8 @@ void can09_state::can09_map(address_map &map)
 //  AM_RANGE(0x0000, 0x7fff) AM_RAM
 	map(0x0000, 0x7fff).ram().bankrw("bank1");
 	map(0xe000, 0xffff).rom().region("roms", 0);
-	map(0xe020, 0xe020).w(m_crtc, FUNC(h46505_device::address_w));
+	map(0xe020, 0xe020).w(m_crtc, FUNC(hd6845s_device::address_w));
-	map(0xe021, 0xe021).w(m_crtc, FUNC(h46505_device::register_w));
+	map(0xe021, 0xe021).w(m_crtc, FUNC(hd6845s_device::register_w));
 	map(0xe034, 0xe037).rw(m_pia1, FUNC(pia6821_device::read), FUNC(pia6821_device::write));
 
 #if 0
@@ -722,8 +723,8 @@ void can09_state::can09(machine_config &config)
 	/* RAM banks */
 	RAM(config, RAM_TAG).set_default_size("768K");
 
-	// CRTC  init
+	// CRTC init
-	h46505_device &crtc(H46505(config, "crtc", CAN09_CPU_CLOCK)); // TODO: Check actual clock source, An 8MHz UKI crystal is also nearby
+	hd6845s_device &crtc(HD6845S(config, "crtc", CAN09_CPU_CLOCK)); // HD46505SP-1 (HD68A45SP)
 	crtc.set_screen("screen");
 	crtc.set_show_border_area(false);
 	crtc.set_char_width(8);

src/mame/drivers/cgenie.cpp

@@ -82,7 +82,7 @@ private:
 	required_device<cpu_device> m_maincpu;
 	required_device<cassette_image_device> m_cassette;
 	required_device<ram_device> m_ram;
-	required_device<hd6845_device> m_crtc;
+	required_device<hd6845s_device> m_crtc;
 	required_device<rs232_port_device> m_rs232;
 	required_device<cg_exp_slot_device> m_exp;
 	required_memory_region m_char_rom;
@@ -125,8 +125,8 @@ void cgenie_state::cgenie_io(address_map &map)
 	map.global_mask(0xff);
 	map(0xf8, 0xf8).w("ay8910", FUNC(ay8910_device::address_w));
 	map(0xf9, 0xf9).rw("ay8910", FUNC(ay8910_device::data_r), FUNC(ay8910_device::data_w));
-	map(0xfa, 0xfa).w(m_crtc, FUNC(hd6845_device::address_w));
+	map(0xfa, 0xfa).w(m_crtc, FUNC(hd6845s_device::address_w));
-	map(0xfb, 0xfb).rw(m_crtc, FUNC(hd6845_device::register_r), FUNC(hd6845_device::register_w));
+	map(0xfb, 0xfb).rw(m_crtc, FUNC(hd6845s_device::register_r), FUNC(hd6845s_device::register_w));
 	map(0xff, 0xff).rw(FUNC(cgenie_state::control_r), FUNC(cgenie_state::control_w));
 }
 
@@ -444,9 +444,9 @@ void cgenie_state::cgenie(machine_config &config)
 	// video hardware
 	screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
 	screen.set_raw(XTAL(17'734'470) / 2, 568, 32, 416, 312, 28, 284);
-	screen.set_screen_update("crtc", FUNC(hd6845_device::screen_update));
+	screen.set_screen_update("crtc", FUNC(hd6845s_device::screen_update));
 
-	HD6845(config, m_crtc, XTAL(17'734'470) / 16);
+	HD6845S(config, m_crtc, XTAL(17'734'470) / 16);
 	m_crtc->set_screen("screen");
 	m_crtc->set_show_border_area(true);
 	m_crtc->set_char_width(8);

src/mame/drivers/chance32.cpp

@@ -475,7 +475,7 @@ void chance32_state::chance32(machine_config &config)
 	screen.set_visarea(0, 35*16-1, 0, 29*8-1);
 	screen.set_screen_update(FUNC(chance32_state::screen_update_chance32));
 
-	h46505_device &crtc(H46505(config, "crtc", 12000000/16));   /* 52.786 Hz (similar to Major Poker) */
+	hd6845s_device &crtc(HD6845S(config, "crtc", 12000000/16));   /* 52.786 Hz (similar to Major Poker) */
 	crtc.set_screen("screen");
 	crtc.set_show_border_area(false);
 	crtc.set_char_width(16);

src/mame/drivers/coinmstr.cpp

@@ -1284,7 +1284,7 @@ void coinmstr_state::coinmstr(machine_config &config)
 	GFXDECODE(config, m_gfxdecode, m_palette, gfx_coinmstr);
 	PALETTE(config, m_palette).set_entries(46*32*4);
 
-	h46505_device &crtc(H46505(config, "crtc", 14000000 / 16));
+	mc6845_device &crtc(MC6845(config, "crtc", 14000000 / 16));
 	crtc.set_screen("screen");
 	crtc.set_show_border_area(false);
 	crtc.set_char_width(8);

src/mame/drivers/dgn_beta.cpp

@@ -334,7 +334,7 @@ void dgn_beta_state::dgnbeta(machine_config &config)
 	screen.set_vblank_time(ATTOSECONDS_IN_USEC(100));
 	screen.set_size(700,550);
 	screen.set_visarea(0, 699, 0, 549);
-	screen.set_screen_update("crtc", FUNC(hd6845_device::screen_update));
+	screen.set_screen_update("crtc", FUNC(hd6845s_device::screen_update));
 	screen.set_video_attributes(VIDEO_UPDATE_AFTER_VBLANK);
 
 	GFXDECODE(config, "gfxdecode", m_palette, gfx_dgnbeta);
@@ -379,7 +379,7 @@ void dgn_beta_state::dgnbeta(machine_config &config)
 	FLOPPY_CONNECTOR(config, FDC_TAG ":2", dgnbeta_floppies, nullptr, dgn_beta_state::floppy_formats).enable_sound(true);
 	FLOPPY_CONNECTOR(config, FDC_TAG ":3", dgnbeta_floppies, nullptr, dgn_beta_state::floppy_formats).enable_sound(true);
 
-	HD6845(config, m_mc6845, 12.288_MHz_XTAL / 16);    //XTAL is guessed
+	HD6845S(config, m_mc6845, 12.288_MHz_XTAL / 16);    //XTAL is guessed
 	m_mc6845->set_screen("screen");
 	m_mc6845->set_show_border_area(false);
 	m_mc6845->set_char_width(16); /*?*/

src/mame/drivers/docastle.cpp

@@ -610,7 +610,7 @@ void docastle_state::docastle(machine_config &config)
 	WATCHDOG_TIMER(config, "watchdog");
 
 	/* video hardware */
-	H46505(config, m_crtc, XTAL(9'828'000) / 16);
+	HD6845S(config, m_crtc, XTAL(9'828'000) / 16);
 	/*
 	The games program the CRTC for a width of 32 characters (256 pixels).
 	However, the DE output from the CRTC is first ANDed with the NAND of

src/mame/drivers/dragon.cpp

@@ -306,11 +306,11 @@ void d64plus_state::d64plus(machine_config &config)
 	plus_screen.set_vblank_time(ATTOSECONDS_IN_USEC(2500)); /* not accurate */
 	plus_screen.set_size(640, 264);
 	plus_screen.set_visarea_full();
-	plus_screen.set_screen_update("crtc", FUNC(hd6845_device::screen_update));
+	plus_screen.set_screen_update("crtc", FUNC(hd6845s_device::screen_update));
 	PALETTE(config, m_palette, palette_device::MONOCHROME);
 
 	// crtc
-	HD6845(config, m_crtc, 14.218_MHz_XTAL / 4 / 2);
+	HD6845S(config, m_crtc, 14.218_MHz_XTAL / 4 / 2);
 	m_crtc->set_screen("plus_screen");
 	m_crtc->set_show_border_area(false);
 	m_crtc->set_char_width(8);

src/mame/drivers/duet16.cpp

@@ -160,8 +160,8 @@ void duet16_state::duet16_mem(address_map &map)
 	map(0xf8060, 0xf8067).rw("bgpit", FUNC(pit8253_device::read), FUNC(pit8253_device::write)).umask16(0x00ff);
 	map(0xf8080, 0xf8087).rw("sio", FUNC(upd7201_new_device::ba_cd_r), FUNC(upd7201_new_device::ba_cd_w)).umask16(0x00ff);
 	map(0xf80a0, 0xf80a3).rw("kbusart", FUNC(i8251_device::read), FUNC(i8251_device::write)).umask16(0x00ff);
-	map(0xf80c0, 0xf80c0).rw("crtc", FUNC(h46505_device::status_r), FUNC(h46505_device::address_w));
+	map(0xf80c0, 0xf80c0).rw("crtc", FUNC(hd6845s_device::status_r), FUNC(hd6845s_device::address_w));
-	map(0xf80c2, 0xf80c2).rw("crtc", FUNC(h46505_device::register_r), FUNC(h46505_device::register_w));
+	map(0xf80c2, 0xf80c2).rw("crtc", FUNC(hd6845s_device::register_r), FUNC(hd6845s_device::register_w));
 	map(0xf80e0, 0xf80e3).rw("i8741", FUNC(upi41_cpu_device::upi41_master_r), FUNC(upi41_cpu_device::upi41_master_w)).umask16(0x00ff);
 	map(0xf8100, 0xf8103).m(m_fdc, FUNC(upd765a_device::map)).umask16(0x00ff);
 	map(0xf8120, 0xf8120).rw(FUNC(duet16_state::rtc_r), FUNC(duet16_state::rtc_w));
@@ -420,7 +420,7 @@ void duet16_state::duet16(machine_config &config)
 	FLOPPY_CONNECTOR(config, "fdc:0", duet16_floppies, "525qd", floppy_image_device::default_floppy_formats, true);
 	FLOPPY_CONNECTOR(config, "fdc:1", duet16_floppies, "525qd", floppy_image_device::default_floppy_formats, true);
 
-	h46505_device &crtc(H46505(config, "crtc", 2000000));
+	hd6845s_device &crtc(HD6845S(config, "crtc", 2000000)); // "46505S" on schematics
 	crtc.set_char_width(8);
 	crtc.set_update_row_callback(FUNC(duet16_state::crtc_update_row), this);
 
@@ -433,7 +433,7 @@ void duet16_state::duet16(machine_config &config)
 	m_screen->set_refresh_hz(60);
 	m_screen->set_size(640, 480);
 	m_screen->set_visarea_full();
-	m_screen->set_screen_update("crtc", FUNC(h46505_device::screen_update));
+	m_screen->set_screen_update("crtc", FUNC(hd6845s_device::screen_update));
 
 	MSM58321(config, m_rtc, 32768_Hz_XTAL);
 	m_rtc->d0_handler().set(FUNC(duet16_state::rtc_d0_w));

src/mame/drivers/fanucspmg.cpp

@@ -1005,7 +1005,7 @@ void fanucspmg_state::fanucspmg(machine_config &config)
 	screen.set_raw(XTAL(15'000'000), 640, 0, 512, 390, 0, 384);
 	screen.set_screen_update(CRTC_TAG, FUNC(mc6845_device::screen_update));
 
-	HD6845(config, m_crtc, XTAL(8'000'000)/2);
+	HD6845S(config, m_crtc, XTAL(8'000'000)/2);
 	m_crtc->set_screen(SCREEN_TAG);
 	m_crtc->set_show_border_area(false);
 	m_crtc->set_char_width(8);

src/mame/drivers/flipjack.cpp

@@ -292,8 +292,8 @@ void flipjack_state::main_map(address_map &map)
 	map(0x6000, 0x67ff).ram();
 	map(0x6800, 0x6803).rw("ppi8255", FUNC(i8255_device::read), FUNC(i8255_device::write));
 	map(0x7000, 0x7000).w(FUNC(flipjack_state::soundlatch_w));
-	map(0x7010, 0x7010).w("crtc", FUNC(hd6845_device::address_w));
+	map(0x7010, 0x7010).w("crtc", FUNC(hd6845s_device::address_w));
-	map(0x7011, 0x7011).w("crtc", FUNC(hd6845_device::register_w));
+	map(0x7011, 0x7011).w("crtc", FUNC(hd6845s_device::register_w));
 	map(0x7020, 0x7020).portr("DSW");
 	map(0x7800, 0x7800).w(FUNC(flipjack_state::layer_w));
 	map(0x8000, 0x9fff).rom();
@@ -439,9 +439,9 @@ void flipjack_state::flipjack(machine_config &config)
 	/* video hardware */
 	screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
 	screen.set_raw(VIDEO_CLOCK, 0x188, 0, 0x100, 0x100, 0, 0xc0); // from crtc
-	screen.set_screen_update("crtc", FUNC(hd6845_device::screen_update));
+	screen.set_screen_update("crtc", FUNC(hd6845s_device::screen_update));
 
-	hd6845_device &crtc(HD6845(config, "crtc", VIDEO_CLOCK/8));
+	hd6845s_device &crtc(HD6845S(config, "crtc", VIDEO_CLOCK/8));
 	crtc.set_screen("screen");
 	crtc.set_show_border_area(false);
 	crtc.set_char_width(8);

src/mame/drivers/fp1100.cpp

@@ -655,7 +655,7 @@ void fp1100_state::fp1100(machine_config &config)
 	screen.set_vblank_time(ATTOSECONDS_IN_USEC(2500)); /* not accurate */
 	screen.set_size(640, 480);
 	screen.set_visarea_full();
-	screen.set_screen_update("crtc", FUNC(h46505_device::screen_update));
+	screen.set_screen_update("crtc", FUNC(mc6845_device::screen_update));
 	PALETTE(config, m_palette).set_entries(8);
 	GFXDECODE(config, "gfxdecode", m_palette, gfx_fp1100);
 
@@ -665,7 +665,7 @@ void fp1100_state::fp1100(machine_config &config)
 			.add_route(ALL_OUTPUTS, "mono", 0.50); // inside the keyboard
 
 	/* CRTC */
-	H46505(config, m_crtc, MAIN_CLOCK/8);   /* hand tuned to get ~60 fps */
+	MC6845(config, m_crtc, MAIN_CLOCK/8);   /* unknown variant; hand tuned to get ~60 fps */
 	m_crtc->set_screen("screen");
 	m_crtc->set_show_border_area(false);
 	m_crtc->set_char_width(8);

src/mame/drivers/fp6000.cpp

@@ -313,7 +313,7 @@ void fp6000_state::fp6000(machine_config &config)
 	screen.set_screen_update(FUNC(fp6000_state::screen_update_fp6000));
 	screen.set_palette(m_palette);
 
-	H46505(config, m_crtc, 16000000/5);    /* unknown clock, hand tuned to get ~60 fps */
+	MC6845(config, m_crtc, 16000000/5);    /* unknown variant, unknown clock, hand tuned to get ~60 fps */
 	m_crtc->set_screen("screen");
 	m_crtc->set_show_border_area(false);
 	m_crtc->set_char_width(8);

src/mame/drivers/hitpoker.cpp

@@ -479,7 +479,7 @@ void hitpoker_state::hitpoker(machine_config &config)
 	screen.set_visarea(0, 648-1, 0, 240-1);
 	screen.set_screen_update(FUNC(hitpoker_state::screen_update_hitpoker));
 
-	h46505_device &crtc(H46505(config, "crtc", CRTC_CLOCK/2));  /* hand tuned to get ~60 fps */
+	hd6845s_device &crtc(HD6845S(config, "crtc", CRTC_CLOCK/2));  /* hand tuned to get ~60 fps */
 	crtc.set_screen("screen");
 	crtc.set_show_border_area(false);
 	crtc.set_char_width(8);

src/mame/drivers/hnayayoi.cpp

@@ -119,8 +119,8 @@ void hnayayoi_state::hnayayoi_io_map(address_map &map)
 	map(0x02, 0x03).r("ymsnd", FUNC(ym2203_device::read));
 	map(0x04, 0x04).portr("DSW3");
 	map(0x06, 0x06).w(FUNC(hnayayoi_state::adpcm_data_w));
-	map(0x08, 0x08).w("crtc", FUNC(hd6845_device::address_w));
+	map(0x08, 0x08).w("crtc", FUNC(hd6845s_device::address_w));
-	map(0x09, 0x09).w("crtc", FUNC(hd6845_device::register_w));
+	map(0x09, 0x09).w("crtc", FUNC(hd6845s_device::register_w));
 	map(0x0a, 0x0a).w(FUNC(hnayayoi_state::dynax_blitter_rev1_start_w));
 	map(0x0c, 0x0c).w(FUNC(hnayayoi_state::dynax_blitter_rev1_clear_w));
 	map(0x20, 0x27).w(m_mainlatch, FUNC(ls259_device::write_d0));
@@ -141,8 +141,8 @@ void hnayayoi_state::hnfubuki_map(address_map &map)
 	map(0xff02, 0xff03).r("ymsnd", FUNC(ym2203_device::read));
 	map(0xff04, 0xff04).portr("DSW3");
 	map(0xff06, 0xff06).w(FUNC(hnayayoi_state::adpcm_data_w));
-	map(0xff08, 0xff08).w("crtc", FUNC(hd6845_device::address_w));
+	map(0xff08, 0xff08).w("crtc", FUNC(hd6845s_device::address_w));
-	map(0xff09, 0xff09).w("crtc", FUNC(hd6845_device::register_w));
+	map(0xff09, 0xff09).w("crtc", FUNC(hd6845s_device::register_w));
 	map(0xff0a, 0xff0a).w(FUNC(hnayayoi_state::dynax_blitter_rev1_start_w));
 	map(0xff0c, 0xff0c).w(FUNC(hnayayoi_state::dynax_blitter_rev1_clear_w));
 	map(0xff20, 0xff27).w(m_mainlatch, FUNC(ls259_device::write_d0));
@@ -166,7 +166,7 @@ void hnayayoi_state::untoucha_io_map(address_map &map)
 	map.global_mask(0xff);
 	map(0x10, 0x10).w("ymsnd", FUNC(ym2203_device::control_port_w));
 	map(0x11, 0x11).r("ymsnd", FUNC(ym2203_device::status_port_r));
-	map(0x12, 0x12).w("crtc", FUNC(hd6845_device::address_w));
+	map(0x12, 0x12).w("crtc", FUNC(hd6845s_device::address_w));
 	map(0x13, 0x13).w(FUNC(hnayayoi_state::adpcm_data_w));
 	map(0x14, 0x14).portr("COIN");
 	map(0x15, 0x15).r(FUNC(hnayayoi_state::keyboard_1_r));
@@ -179,7 +179,7 @@ void hnayayoi_state::untoucha_io_map(address_map &map)
 	map(0x30, 0x37).w(m_mainlatch, FUNC(ls259_device::write_d0));
 	map(0x50, 0x50).w("ymsnd", FUNC(ym2203_device::write_port_w));
 	map(0x51, 0x51).r("ymsnd", FUNC(ym2203_device::read_port_r));
-	map(0x52, 0x52).w("crtc", FUNC(hd6845_device::register_w));
+	map(0x52, 0x52).w("crtc", FUNC(hd6845s_device::register_w));
 }
 
 static INPUT_PORTS_START( hf_keyboard )
@@ -562,11 +562,11 @@ void hnayayoi_state::hnayayoi(machine_config &config)
 	/* video hardware */
 	screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
 	screen.set_raw(20_MHz_XTAL / 2, 632, 0, 512, 263, 0, 243);
-	screen.set_screen_update("crtc", FUNC(hd6845_device::screen_update));
+	screen.set_screen_update("crtc", FUNC(hd6845s_device::screen_update));
 
 	PALETTE(config, m_palette, palette_device::RGB_444_PROMS, "proms", 256);
 
-	hd6845_device &crtc(HD6845(config, "crtc", 20_MHz_XTAL / 8));
+	hd6845s_device &crtc(HD6845S(config, "crtc", 20_MHz_XTAL / 8));
 	crtc.set_screen("screen");
 	crtc.set_char_width(4);
 	crtc.set_show_border_area(false);
@@ -611,7 +611,7 @@ void hnayayoi_state::untoucha(machine_config &config)
 	m_mainlatch->q_out_cb<3>().set(m_msm, FUNC(msm5205_device::reset_w)).invert();
 	m_mainlatch->q_out_cb<4>().set_nop(); // ?
 
-	subdevice<hd6845_device>("crtc")->set_update_row_callback(FUNC(hnayayoi_state::untoucha_update_row), this);
+	subdevice<hd6845s_device>("crtc")->set_update_row_callback(FUNC(hnayayoi_state::untoucha_update_row), this);
 
 	MCFG_VIDEO_START_OVERRIDE(hnayayoi_state,untoucha)
 }

src/mame/drivers/itt1700.cpp

@@ -60,8 +60,8 @@ void itt1700_state::mem_map(address_map &map)
 void itt1700_state::io_map(address_map &map)
 {
 	map.global_mask(0xff);
-	map(0x10, 0x10).w("crtc", FUNC(hd6845_device::address_w));
+	map(0x10, 0x10).w("crtc", FUNC(hd6845s_device::address_w));
-	map(0x11, 0x11).w("crtc", FUNC(hd6845_device::register_w));
+	map(0x11, 0x11).w("crtc", FUNC(hd6845s_device::register_w));
 	map(0x20, 0x21).rw("upi", FUNC(i8741_device::upi41_master_r), FUNC(i8741_device::upi41_master_w));
 }
 
@@ -86,7 +86,7 @@ void itt1700_state::itt1700(machine_config &config)
 	screen.set_raw(16.6698_MHz_XTAL, 882, 0, 720, 315, 0, 300);
 	screen.set_screen_update("crtc", FUNC(mc6845_device::screen_update));
 
-	hd6845_device &crtc(HD6845(config, "crtc", 16.6698_MHz_XTAL / 9)); // on video board
+	hd6845s_device &crtc(HD6845S(config, "crtc", 16.6698_MHz_XTAL / 9)); // on video board
 	crtc.set_char_width(9);
 	crtc.set_screen("screen");
 	crtc.set_show_border_area(false);

src/mame/drivers/laserbas.cpp

@@ -396,7 +396,7 @@ void laserbas_state::laserbas(machine_config &config)
 	screen.set_raw(4000000, 256, 0, 256, 256, 0, 256);   /* temporary, CRTC will configure screen */
 	screen.set_screen_update("crtc", FUNC(mc6845_device::screen_update));
 
-	h46505_device &crtc(H46505(config, "crtc", 3000000/4)); /* unknown clock, hand tuned to get ~60 fps */
+	mc6845_device &crtc(MC6845(config, "crtc", 3000000/4)); /* unknown clock, hand tuned to get ~60 fps */
 	crtc.set_screen("screen");
 	crtc.set_show_border_area(false);
 	crtc.set_char_width(8);

src/mame/drivers/lola8a.cpp

@@ -284,11 +284,11 @@ void lola8a_state::lola8a(machine_config &config)
 	screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
 	screen.set_refresh_hz(50);
 	screen.set_vblank_time(ATTOSECONDS_IN_USEC(2500)); /* not accurate */
-	screen.set_screen_update(HD46505SP_TAG, FUNC(hd6845_device::screen_update));
+	screen.set_screen_update(HD46505SP_TAG, FUNC(hd6845s_device::screen_update));
 	screen.set_size(640, 480);
 	screen.set_visarea(0, 640-1, 0, 480-1);
 
-	hd6845_device &crtc(HD6845(config, HD46505SP_TAG, XTAL(8'000'000) / 8)); // HD6845 == HD46505S
+	hd6845s_device &crtc(HD6845S(config, HD46505SP_TAG, XTAL(8'000'000) / 8)); // HD6845 == HD46505S
 	crtc.set_screen("screen");
 	crtc.set_show_border_area(false);
 	crtc.set_char_width(8);

src/mame/drivers/luckgrln.cpp

@@ -868,7 +868,7 @@ void luckgrln_state::luckgrln(machine_config &config)
 	m_maincpu->set_addrmap(AS_IO, &luckgrln_state::luckgrln_io);
 	m_maincpu->set_vblank_int("screen", FUNC(luckgrln_state::irq));
 
-	h46505_device &crtc(H46505(config, "crtc", 6000000/4)); /* unknown clock, hand tuned to get ~60 fps */
+	hd6845s_device &crtc(HD6845S(config, "crtc", 6000000/4)); /* HD6845SP; unknown clock, hand tuned to get ~60 fps */
 	crtc.set_screen("screen");
 	crtc.set_show_border_area(false);
 	crtc.set_char_width(8);

src/mame/drivers/mbc200.cpp

@@ -319,11 +319,11 @@ void mbc200_state::mbc200(machine_config &config)
 	screen.set_vblank_time(ATTOSECONDS_IN_USEC(2500)); /* not accurate */
 	screen.set_size(640, 400);
 	screen.set_visarea(0, 640-1, 0, 400-1);
-	screen.set_screen_update("crtc", FUNC(h46505_device::screen_update));
+	screen.set_screen_update("crtc", FUNC(hd6845s_device::screen_update));
 	GFXDECODE(config, "gfxdecode", m_palette, gfx_mbc200);
 	PALETTE(config, m_palette, palette_device::MONOCHROME);
 
-	H46505(config, m_crtc, 8_MHz_XTAL / 4); // HD46505SP
+	HD6845S(config, m_crtc, 8_MHz_XTAL / 4); // HD46505SP
 	m_crtc->set_screen("screen");
 	m_crtc->set_show_border_area(false);
 	m_crtc->set_char_width(8);

src/mame/drivers/mbc55x.cpp

@@ -289,7 +289,7 @@ void mbc55x_state::mbc55x(machine_config &config)
 	m_ppi->in_pc_callback().set(FUNC(mbc55x_state::printer_status_r));
 	m_ppi->out_pc_callback().set(FUNC(mbc55x_state::disk_select_w));
 
-	HD6845(config, m_crtc, 14.318181_MHz_XTAL / 8); // HD46505SP-1
+	HD6845S(config, m_crtc, 14.318181_MHz_XTAL / 8); // HD46505SP-1
 	m_crtc->set_screen(SCREEN_TAG);
 	m_crtc->set_show_border_area(false);
 	m_crtc->set_char_width(8);

src/mame/drivers/mpu4dealem.cpp

@@ -225,7 +225,7 @@ void mpu4dealem_state::dealem(machine_config &config)
 
 	PALETTE(config, m_palette, FUNC(mpu4dealem_state::dealem_palette), 32);
 
-	hd6845_device &crtc(HD6845(config, "crtc", MPU4_MASTER_CLOCK / 4 / 8)); /* HD68B45 */
+	hd6845s_device &crtc(HD6845S(config, "crtc", MPU4_MASTER_CLOCK / 4 / 8)); /* HD68B45 */
 	crtc.set_screen("screen");
 	crtc.set_show_border_area(false);
 	crtc.set_char_width(8);

src/mame/drivers/multi16.cpp

@@ -68,7 +68,7 @@ private:
 	required_device<cpu_device> m_maincpu;
 	required_device<pic8259_device> m_pic;
 	required_device<pit8253_device> m_pit;
-	required_device<hd6845_device> m_crtc;
+	required_device<hd6845s_device> m_crtc;
 	required_device<palette_device> m_palette;
 	required_device<mb8866_device> m_fdc;
 	required_device_array<floppy_connector, 2> m_floppy;
@@ -123,8 +123,8 @@ void multi16_state::multi16_io(address_map &map)
 //	map(0x07, 0x07) // ?
 //	map(0x08, 0x0b) // ?
 	map(0x0c, 0x0f).rw(m_pit, FUNC(pit8253_device::read), FUNC(pit8253_device::write));
-	map(0x40, 0x40).w(m_crtc, FUNC(hd6845_device::address_w));
+	map(0x40, 0x40).w(m_crtc, FUNC(hd6845s_device::address_w));
-	map(0x41, 0x41).rw(m_crtc, FUNC(hd6845_device::register_r), FUNC(hd6845_device::register_w));
+	map(0x41, 0x41).rw(m_crtc, FUNC(hd6845s_device::register_r), FUNC(hd6845s_device::register_w));
 //	map(0x42, 0x44) // ?
 //	map(0x48, 0x48) // ?
 //	map(0x4e, 0x4e) // ?
@@ -165,11 +165,11 @@ void multi16_state::multi16(machine_config &config)
 	// video hardware
 	screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
 	screen.set_raw(16000000, 848, 0, 640, 518, 0, 400); // unknown clock
-	screen.set_screen_update("crtc", FUNC(hd6845_device::screen_update));
+	screen.set_screen_update("crtc", FUNC(hd6845s_device::screen_update));
 
 	PALETTE(config, m_palette, palette_device::RGB_3BIT);
 
-	HD6845(config, m_crtc, 2000000); // unknown clock
+	HD6845S(config, m_crtc, 2000000); // unknown clock
 	m_crtc->set_screen("screen");
 	m_crtc->set_show_border_area(false);
 	m_crtc->set_char_width(8);

src/mame/drivers/multi8.cpp

@@ -594,7 +594,7 @@ void multi8_state::multi8(machine_config &config)
 	/* devices */
 	TIMER(config, "keyboard_timer").configure_periodic(FUNC(multi8_state::keyboard_callback), attotime::from_hz(240/32));
 
-	H46505(config, m_crtc, XTAL(3'579'545)/2);    /* unknown clock, hand tuned to get ~60 fps */
+	MC6845(config, m_crtc, XTAL(3'579'545)/2);    /* unknown variant, unknown clock, hand tuned to get ~60 fps */
 	m_crtc->set_screen("screen");
 	m_crtc->set_show_border_area(false);
 	m_crtc->set_char_width(8);

src/mame/drivers/myb3k.cpp

@@ -228,7 +228,7 @@ private:
 	required_device<i8257_device> m_dma8257;
 	required_device<speaker_sound_device>   m_speaker;
 	required_device<myb3k_keyboard_device> m_kb;
-	required_device<h46505_device> m_crtc;
+	required_device<hd6845s_device> m_crtc;
 	required_shared_ptr<uint8_t> m_vram;
 	required_device<isa8_device> m_isabus;
 	optional_device<centronics_device> m_centronics;
@@ -597,8 +597,8 @@ void myb3k_state::myb3k_io(address_map &map)
 	map(0x10, 0x18).rw(m_dma8257, FUNC(i8257_device::read), FUNC(i8257_device::write));
 
 	// 1c-1d HD46505S CRTC
-	map(0x1c, 0x1c).rw(m_crtc, FUNC(h46505_device::status_r), FUNC(h46505_device::address_w));
+	map(0x1c, 0x1c).rw(m_crtc, FUNC(hd6845s_device::status_r), FUNC(hd6845s_device::address_w));
-	map(0x1d, 0x1d).rw(m_crtc, FUNC(h46505_device::register_r), FUNC(h46505_device::register_w));
+	map(0x1d, 0x1d).rw(m_crtc, FUNC(hd6845s_device::register_r), FUNC(hd6845s_device::register_w));
 
 	/* Expansion Unit 0x800 - 0xfff */
 }
@@ -980,7 +980,7 @@ void myb3k_state::myb3k(machine_config &config)
 	// m_pit8253->out_handler<2>().set(FUNC(myb3k_state::pit_out2_changed));
 
 	/* Video controller */
-	H46505(config, m_crtc, XTAL(14'318'181) / 16); /* Main crystal divided by 16 through a 74163 4 bit counter */
+	HD6845S(config, m_crtc, XTAL(14'318'181) / 16); /* Main crystal divided by 16 through a 74163 4 bit counter */
 	m_crtc->set_screen(m_screen);
 	m_crtc->set_show_border_area(false);
 	m_crtc->set_char_width(8);
@@ -1027,7 +1027,7 @@ void myb3k_state::myb3k(machine_config &config)
 	/* Monitor */
 	SCREEN(config, m_screen, SCREEN_TYPE_RASTER);
 	m_screen->set_raw(XTAL(14'318'181) / 3, 600, 0, 600, 400, 0, 400);
-	m_screen->set_screen_update("crtc", FUNC(h46505_device::screen_update));
+	m_screen->set_screen_update("crtc", FUNC(hd6845s_device::screen_update));
 }
 
 void myb3k_state::jb3000(machine_config &config)

src/mame/drivers/nyny.cpp

@@ -618,7 +618,7 @@ void nyny_state::nyny(machine_config &config)
 
 	PALETTE(config, m_palette, palette_device::RGB_3BIT);
 
-	H46505(config, m_mc6845, CRTC_CLOCK);
+	MC6845(config, m_mc6845, CRTC_CLOCK); // HD46505P
 	m_mc6845->set_screen("screen");
 	m_mc6845->set_show_border_area(false);
 	m_mc6845->set_char_width(8);

src/mame/drivers/othello.cpp

@@ -415,11 +415,11 @@ void othello_state::othello(machine_config &config)
 	screen.set_vblank_time(ATTOSECONDS_IN_USEC(0));
 	screen.set_size(64*6, 64*8);
 	screen.set_visarea(0*8, 64*6-1, 0*8, 64*8-1);
-	screen.set_screen_update("crtc", FUNC(h46505_device::screen_update));
+	screen.set_screen_update("crtc", FUNC(hd6845s_device::screen_update));
 
 	PALETTE(config, m_palette, FUNC(othello_state::othello_palette), 0x10);
 
-	h46505_device &crtc(H46505(config, "crtc", 1000000 /* ? MHz */));   /* H46505 @ CPU clock */
+	hd6845s_device &crtc(HD6845S(config, "crtc", 1000000 /* ? MHz */));   /* HD46505SP @ CPU clock */
 	crtc.set_screen("screen");
 	crtc.set_show_border_area(false);
 	crtc.set_char_width(TILE_WIDTH);

src/mame/drivers/paso1600.cpp

@@ -325,7 +325,7 @@ void paso1600_state::paso1600(machine_config &config)
 	PALETTE(config, m_palette).set_entries(8);
 
 	/* Devices */
-	h46505_device &crtc(H46505(config, "crtc", 16000000/4));    /* unknown clock, hand tuned to get ~60 fps */
+	mc6845_device &crtc(MC6845(config, "crtc", 16000000/4));    /* unknown variant, unknown clock, hand tuned to get ~60 fps */
 	crtc.set_screen("screen");
 	crtc.set_show_border_area(false);
 	crtc.set_char_width(8);

src/mame/drivers/pasopia.cpp

@@ -301,12 +301,12 @@ void pasopia_state::pasopia(machine_config &config)
 	screen.set_vblank_time(ATTOSECONDS_IN_USEC(2500)); /* not accurate */
 	screen.set_size(640, 480);
 	screen.set_visarea(0, 640-1, 0, 480-1);
-	screen.set_screen_update("crtc", FUNC(h46505_device::screen_update));
+	screen.set_screen_update("crtc", FUNC(mc6845_device::screen_update));
 	GFXDECODE(config, "gfxdecode", m_palette, gfx_pasopia);
 	PALETTE(config, m_palette).set_entries(8);
 
 	/* Devices */
-	H46505(config, m_crtc, XTAL(4'000'000)/4);   /* unknown clock, hand tuned to get ~60 fps */
+	MC6845(config, m_crtc, XTAL(4'000'000)/4);   /* unknown variant, unknown clock, hand tuned to get ~60 fps */
 	m_crtc->set_screen("screen");
 	m_crtc->set_show_border_area(false);
 	m_crtc->set_char_width(8);

src/mame/drivers/pasopia7.cpp

@@ -984,7 +984,7 @@ void pasopia7_state::p7_raster(machine_config &config)
 	PALETTE(config, m_palette, palette_device::BRG_3BIT);
 	GFXDECODE(config, "gfxdecode", m_palette, gfx_pasopia7);
 
-	H46505(config, m_crtc, VDP_CLOCK); /* unknown clock, hand tuned to get ~60 fps */
+	MC6845(config, m_crtc, VDP_CLOCK); /* unknown variant, unknown clock, hand tuned to get ~60 fps */
 	m_crtc->set_screen(m_screen);
 	m_crtc->set_show_border_area(false);
 	m_crtc->set_char_width(8);
@@ -1007,7 +1007,7 @@ void pasopia7_state::p7_lcd(machine_config &config)
 	PALETTE(config, m_palette, FUNC(pasopia7_state::p7_lcd_palette), 8);
 	GFXDECODE(config, "gfxdecode", m_palette, gfx_pasopia7);
 
-	H46505(config, m_crtc, LCD_CLOCK); /* unknown clock, hand tuned to get ~60 fps */
+	MC6845(config, m_crtc, LCD_CLOCK); /* unknown variant, unknown clock, hand tuned to get ~60 fps */
 	m_crtc->set_screen(m_screen);
 	m_crtc->set_show_border_area(false);
 	m_crtc->set_char_width(8);

src/mame/drivers/peoplepc.cpp

@@ -277,7 +277,7 @@ void peoplepc_state::olypeopl(machine_config &config)
 	GFXDECODE(config, m_gfxdecode, m_palette, gfxdecode_device::empty);
 	PALETTE(config, m_palette, palette_device::MONOCHROME);
 
-	h46505_device &crtc(H46505(config, "h46505", XTAL(22'000'000)/8));
+	mc6845_device &crtc(MC6845(config, "h46505", XTAL(22'000'000)/8)); // unknown variant
 	crtc.set_screen("screen");
 	crtc.set_show_border_area(false);
 	crtc.set_char_width(8);

src/mame/drivers/pwrview.cpp

@@ -388,8 +388,8 @@ void pwrview_state::pwrview_io(address_map &map)
 	map(0xc00b, 0xc00b).r(FUNC(pwrview_state::err_r));
 	map(0xc00c, 0xc00d).ram();
 	map(0xc080, 0xc080).rw(FUNC(pwrview_state::unk4_r), FUNC(pwrview_state::unk4_w));
-	map(0xc088, 0xc088).w("crtc", FUNC(hd6845_device::address_w));
+	map(0xc088, 0xc088).w("crtc", FUNC(hd6845s_device::address_w));
-	map(0xc08a, 0xc08a).rw("crtc", FUNC(hd6845_device::register_r), FUNC(hd6845_device::register_w));
+	map(0xc08a, 0xc08a).rw("crtc", FUNC(hd6845s_device::register_r), FUNC(hd6845s_device::register_w));
 	map(0xc280, 0xc287).rw(FUNC(pwrview_state::unk3_r), FUNC(pwrview_state::unk3_w)).umask16(0x00ff);
 	map(0xc288, 0xc28f).rw(m_pit, FUNC(pit8253_device::read), FUNC(pit8253_device::write)).umask16(0x00ff);
 	map(0xc2a0, 0xc2a7).rw("sio", FUNC(z80sio2_device::cd_ba_r), FUNC(z80sio2_device::cd_ba_w)).umask16(0x00ff);
@@ -413,7 +413,7 @@ void pwrview_state::pwrview(machine_config &config)
 
 	screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
 	screen.set_raw(XTAL(64'000'000)/8, 480, 0, 384, 1040, 0, 960);  // clock unknown
-	screen.set_screen_update("crtc", FUNC(hd6845_device::screen_update));
+	screen.set_screen_update("crtc", FUNC(hd6845s_device::screen_update));
 
 	PIT8253(config, m_pit, 0);
 	m_pit->set_clk<0>(XTAL(16'000'000)/16); // clocks unknown, fix above when found
@@ -431,7 +431,7 @@ void pwrview_state::pwrview(machine_config &config)
 
 	Z80SIO2(config, "sio", 4000000);
 
-	hd6845_device &crtc(HD6845(config, "crtc", XTAL(64'000'000)/64)); // clock unknown
+	hd6845s_device &crtc(HD6845S(config, "crtc", XTAL(64'000'000)/64)); // clock unknown
 	crtc.set_char_width(32);   /* ? */
 	crtc.set_update_row_callback(FUNC(pwrview_state::update_row), this);
 

src/mame/drivers/qvt102.cpp

@@ -6,7 +6,7 @@
 
     Known hardware:
     - Motorola 6800 CPU
-    - Hitachi HD46505 (Motorola 6845-compatible) CRTC
+    - Hitachi HD46505SP (Motorola 6845-compatible) CRTC
     - Hitachi HD46850 (Motorola 6850-compatible) ACIA
     - M58725P-15 (6116-compatible) (2k x 8bit RAM)
     - Zilog Z8430 CTC
@@ -62,7 +62,7 @@ private:
 	required_device<m6800_cpu_device> m_maincpu;
 	required_device<acia6850_device> m_acia;
 	required_device<z80ctc_device> m_ctc;
-	required_device<h46505_device> m_crtc;
+	required_device<hd6845s_device> m_crtc;
 	required_device<screen_device> m_screen;
 	required_device<gfxdecode_device> m_gfxdecode;
 	required_device<palette_device> m_palette;
@@ -150,7 +150,7 @@ void qvt102_state::qvt102(machine_config &config)
 	PALETTE(config, m_palette, palette_device::MONOCHROME_HIGHLIGHT);
 	GFXDECODE(config, m_gfxdecode, m_palette, chars);
 
-	H46505(config, m_crtc, MASTER_CLOCK / 9);
+	HD6845S(config, m_crtc, MASTER_CLOCK / 9);
 	m_crtc->set_screen("screen");
 	m_crtc->set_show_border_area(false);
 	m_crtc->set_char_width(9);

src/mame/drivers/royalmah.cpp

@@ -3650,7 +3650,7 @@ void royalmah_state::janyoup2(machine_config &config)
 	m_maincpu->set_clock(XTAL(18'432'000)/4); // unknown divider
 	m_maincpu->set_addrmap(AS_IO, &royalmah_state::janyoup2_iomap);
 
-	h46505_device &crtc(H46505(config, "crtc", XTAL(18'432'000)/12)); // unknown divider
+	hd6845s_device &crtc(HD6845S(config, "crtc", XTAL(18'432'000)/12)); // unknown divider
 	crtc.set_screen("screen");
 	crtc.set_show_border_area(false);
 	crtc.set_char_width(4);

src/mame/drivers/smc777.cpp

@@ -1128,7 +1128,7 @@ MACHINE_CONFIG_START(smc777_state::smc777)
 
 	GFXDECODE(config, m_gfxdecode, m_palette, gfxdecode_device::empty);
 
-	H46505(config, m_crtc, MASTER_CLOCK/2);    /* unknown clock, hand tuned to get ~60 fps */
+	HD6845S(config, m_crtc, MASTER_CLOCK/2);    /* HD68A45SP; unknown clock, hand tuned to get ~60 fps */
 	m_crtc->set_screen(m_screen);
 	m_crtc->set_show_border_area(true);
 	m_crtc->set_char_width(8);
@@ -1165,8 +1165,8 @@ ROM_START( smc777 )
 	ROM_SYSTEM_BIOS(1, "2nd", "2nd rev.")
 	ROMX_LOAD( "smcrom.v2",  0x0000, 0x4000, CRC(c1494b8f) SHA1(a7396f5c292f11639ffbf0b909e8473c5aa63518), ROM_BIOS(1))
 
-	ROM_REGION( 0x800, "mcu", ROMREGION_ERASEFF )
+	ROM_REGION( 0x400, "mcu", ROMREGION_ERASEFF )
-	ROM_LOAD( "i80xx", 0x000, 0x800, NO_DUMP ) // keyboard mcu, needs decapping
+	ROM_LOAD( "m5l8041a-077p.bin", 0x000, 0x400, NO_DUMP ) // 8041 keyboard mcu, needs decapping
 ROM_END
 
 /* Driver */

src/mame/drivers/speedatk.cpp

@@ -323,7 +323,7 @@ void speedatk_state::speedatk(machine_config &config)
 	screen.set_visarea(0*8, 32*8-1, 0*8, 32*8-1);
 	screen.set_screen_update(FUNC(speedatk_state::screen_update));
 
-	H46505(config, m_crtc, MASTER_CLOCK/16);   /* hand tuned to get ~60 fps */
+	MC6845(config, m_crtc, MASTER_CLOCK/16);   /* unknown variant; hand tuned to get ~60 fps */
 	m_crtc->set_screen("screen");
 	m_crtc->set_show_border_area(false);
 	m_crtc->set_char_width(8);

src/mame/drivers/tapatune.cpp

@@ -552,7 +552,7 @@ void tapatune_state::tapatune(machine_config &config)
 
 	config.m_perfect_cpu_quantum = subtag("videocpu");
 
-	h46505_device &crtc(H46505(config, "crtc", XTAL(24'000'000) / 16));
+	hd6845s_device &crtc(HD6845S(config, "crtc", XTAL(24'000'000) / 16));
 	crtc.set_screen("screen");
 	crtc.set_show_border_area(false);
 	crtc.set_char_width(5);
@@ -563,7 +563,7 @@ void tapatune_state::tapatune(machine_config &config)
 	/* video hardware */
 	screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
 	screen.set_raw(XTAL(24'000'000) / 16 * 5, 500, 0, 320, 250, 0, 240);
-	screen.set_screen_update("crtc", FUNC(h46505_device::screen_update));
+	screen.set_screen_update("crtc", FUNC(hd6845s_device::screen_update));
 }
 
 /*************************************

src/mame/drivers/twincobr.cpp

@@ -682,7 +682,7 @@ void twincobr_state::twincobr(machine_config &config)
 	m_coinlatch->q_out_cb<7>().set(FUNC(twincobr_state::coin_lockout_2_w));
 
 	/* video hardware */
-	hd6845_device &crtc(HD6845(config, "crtc", XTAL(28'000'000)/8)); /* 3.5MHz measured on CLKin */
+	hd6845s_device &crtc(HD6845S(config, "crtc", XTAL(28'000'000)/8)); /* 3.5MHz measured on CLKin */
 	crtc.set_screen(m_screen);
 	crtc.set_show_border_area(false);
 	crtc.set_char_width(2);

src/mame/drivers/victor9k.cpp

@@ -691,13 +691,13 @@ void victor9k_state::victor9k(machine_config &config)
 	screen.set_color(rgb_t::green());
 	screen.set_refresh_hz(50);
 	screen.set_vblank_time(ATTOSECONDS_IN_USEC(2500)); // not accurate
-	screen.set_screen_update(HD46505S_TAG, FUNC(hd6845_device::screen_update));
+	screen.set_screen_update(HD46505S_TAG, FUNC(hd6845s_device::screen_update));
 	screen.set_size(640, 480);
 	screen.set_visarea(0, 640-1, 0, 480-1);
 
 	PALETTE(config, m_palette, FUNC(victor9k_state::victor9k_palette), 16);
 
-	HD6845(config, m_crtc, XTAL(30'000'000)/10); // HD6845 == HD46505S
+	HD6845S(config, m_crtc, XTAL(30'000'000)/10); // HD6845 == HD46505S
 	m_crtc->set_screen(SCREEN_TAG);
 	m_crtc->set_show_border_area(true);
 	m_crtc->set_char_width(10);

src/mame/drivers/videosaa.cpp

@@ -96,7 +96,7 @@ void videosaa_state::videosaa(machine_config &config)
 	screen.set_visarea(0, 640-1, 0, 480-1);
 	screen.set_screen_update(FUNC(videosaa_state::screen_update));
 
-	H46505(config, "crtc", 10_MHz_XTAL); // unknown divider
+	HD6845S(config, "crtc", 10_MHz_XTAL); // unknown divider
 
 	GFXDECODE(config, "gfxdecode", "palette", gfx);
 

src/mame/drivers/vk100.cpp

@@ -1043,7 +1043,7 @@ void vk100_state::vk100(machine_config &config)
 	screen.set_raw(XTAL(45'619'200)/3, 882, 0, 720, 370, 0, 350 ); // fake screen timings for startup until 6845 sets real ones
 	screen.set_screen_update("crtc", FUNC(mc6845_device::screen_update));
 
-	H46505(config, m_crtc, 45.6192_MHz_XTAL/3/12);
+	MC6845(config, m_crtc, 45.6192_MHz_XTAL/3/12); // unknown variant
 	m_crtc->set_screen("screen");
 	m_crtc->set_show_border_area(false);
 	m_crtc->set_char_width(12);

src/mame/drivers/wardner.cpp

@@ -415,7 +415,7 @@ void wardner_state::wardner(machine_config &config)
 	coinlatch.q_out_cb<7>().set(FUNC(wardner_state::coin_lockout_2_w));
 
 	/* video hardware */
-	hd6845_device &crtc(HD6845(config, "crtc", XTAL(14'000'000)/4)); /* 3.5MHz measured on CLKin */
+	hd6845s_device &crtc(HD6845S(config, "crtc", XTAL(14'000'000)/4)); /* 3.5MHz measured on CLKin */
 	crtc.set_screen(m_screen);
 	crtc.set_show_border_area(false);
 	crtc.set_char_width(2);

src/mame/drivers/x1.cpp

@@ -2228,7 +2228,7 @@ void x1_state::x1(machine_config &config)
 	m_screen->set_visarea(0, 640-1, 0, 480-1);
 	m_screen->set_screen_update(FUNC(x1_state::screen_update_x1));
 
-	H46505(config, m_crtc, (VDP_CLOCK/48)); //unknown divider
+	HD6845S(config, m_crtc, (VDP_CLOCK/48)); //unknown divider
 	m_crtc->set_screen(m_screen);
 	m_crtc->set_show_border_area(true);
 	m_crtc->set_char_width(8);

src/mame/drivers/x1twin.cpp

@@ -466,7 +466,7 @@ void x1twin_state::x1twin(machine_config &config)
 	pce_screen.set_raw(PCE_MAIN_CLOCK/2, huc6260_device::WPF, 70, 70 + 512 + 32, huc6260_device::LPF, 14, 14+242);
 	pce_screen.set_screen_update(FUNC(x1twin_state::screen_update_x1pce));
 
-	H46505(config, m_crtc, (VDP_CLOCK/48)); //unknown divider
+	HD6845S(config, m_crtc, (VDP_CLOCK/48)); //unknown divider (TODO: verify chip type)
 	m_crtc->set_screen(m_screen);
 	m_crtc->set_show_border_area(true);
 	m_crtc->set_char_width(8);

src/mame/includes/bbc.h

@@ -219,7 +219,7 @@ protected:
 
 	required_device<cpu_device> m_maincpu;
 	required_device<ram_device> m_ram;
-	required_device<hd6845_device> m_hd6845;
+	required_device<hd6845s_device> m_hd6845;
 	required_device<screen_device> m_screen;
 	required_device<input_merger_device> m_irqs;
 	required_device<palette_device> m_palette;

src/mame/includes/docastle.h

@@ -47,7 +47,7 @@ private:
 	required_device<cpu_device> m_maincpu;
 	required_device<cpu_device> m_slave;
 	required_device<cpu_device> m_cpu3;
-	required_device<h46505_device> m_crtc;
+	required_device<hd6845s_device> m_crtc;
 	optional_device<msm5205_device> m_msm;
 	required_device_array<tms1025_device, 2> m_inp;
 

src/mame/includes/dragon.h

@@ -122,7 +122,7 @@ protected:
 	virtual void device_reset() override;
 
 private:
-	required_device<hd6845_device> m_crtc;
+	required_device<hd6845s_device> m_crtc;
 	required_device<palette_device> m_palette;
 	optional_shared_ptr<uint8_t> m_plus_ram;
 	optional_shared_ptr<uint8_t> m_video_ram;

src/mame/includes/speedatk.h

@@ -25,7 +25,7 @@ public:
 
 private:
 	required_device<cpu_device> m_maincpu;
-	required_device<h46505_device> m_crtc;
+	required_device<mc6845_device> m_crtc;
 	required_device<gfxdecode_device> m_gfxdecode;
 	required_device<palette_device> m_palette;
 

src/mame/video/v1050.cpp

@@ -111,7 +111,7 @@ void v1050_state::video_start()
 
 void v1050_state::v1050_video(machine_config &config)
 {
-	H46505(config, m_crtc, 15.36_MHz_XTAL/8);
+	HD6845S(config, m_crtc, 15.36_MHz_XTAL/8); // HD6845SP according to Programmer's Technical Document
 	m_crtc->set_screen(SCREEN_TAG);
 	m_crtc->set_show_border_area(true);
 	m_crtc->set_char_width(8);
@@ -119,7 +119,7 @@ void v1050_state::v1050_video(machine_config &config)
 	m_crtc->out_vsync_callback().set(FUNC(v1050_state::crtc_vs_w));
 
 	screen_device &screen(SCREEN(config, SCREEN_TAG, SCREEN_TYPE_RASTER, rgb_t::green()));
-	screen.set_screen_update(H46505_TAG, FUNC(h46505_device::screen_update));
+	screen.set_screen_update(H46505_TAG, FUNC(hd6845s_device::screen_update));
 	screen.set_refresh_hz(60);
 	screen.set_vblank_time(ATTOSECONDS_IN_USEC(2500));
 	screen.set_size(640, 400);