hd44780: set typical clock to 270khz

src/mame/alesis/alesis.cpp

@@ -431,7 +431,7 @@ void alesis_state::hr16(machine_config &config)
 	m_cassette->set_default_state(CASSETTE_STOPPED);
 	m_cassette->set_interface("hr16_cass");
 
-	HD44780(config, m_lcdc, 250'000); // TODO: clock not measured, datasheet typical clock used
+	HD44780(config, m_lcdc, 270'000); // TODO: clock not measured, datasheet typical clock used
 	m_lcdc->set_lcd_size(2, 16);
 
 	/* sound hardware */

src/mame/brother/ax145.cpp

@@ -269,7 +269,7 @@ void ax145_state::ax145(machine_config &config) {
 
 	PALETTE(config, "palette", FUNC(ax145_state::palette), 2);
 
-	HD44780(config, m_lcdc, 250'000); // TODO: Wrong device type, should be HD44780-B02 custom character set mask; clock not measured, datasheet typical clock used
+	HD44780(config, m_lcdc, 270'000); // TODO: Wrong device type, should be HD44780-B02 custom character set mask; clock not measured, datasheet typical clock used
 	m_lcdc->set_lcd_size(2, 40);
 }
 

src/mame/canon/canon_s80.cpp

@@ -319,7 +319,7 @@ void canons80_state::canons80(machine_config &config)
 	screen.set_visarea(0, 16*6-1, 0, 16-1);
 	screen.set_palette("palette");
 
-	hd44780_device &hd44780(HD44780(config, "lcdc", 250'000)); // TODO: Wrong device type, should be T1719A; clock not measured, datasheet typical clock used
+	hd44780_device &hd44780(HD44780(config, "lcdc", 270'000)); // TODO: Wrong device type, should be T1719A; clock not measured, datasheet typical clock used
 	hd44780.set_lcd_size(2, 16);
 	hd44780.set_pixel_update_cb(FUNC(canons80_state::pixel_update));
 

src/mame/casio/ctk2000.cpp

@@ -113,7 +113,7 @@ void ctk2000_state::ctk2000(machine_config &config)
 	m_maincpu->adc_cb<3>().set_ioport("AIN3");
 
 	// LCD
-	HD44780(config, m_lcdc, 250'000); // TODO: Wrong device type, should be ST7066U_0A; clock not measured, datasheet typical clock used
+	HD44780(config, m_lcdc, 270'000); // TODO: Wrong device type, should be ST7066U_0A; clock not measured, datasheet typical clock used
 	m_lcdc->set_lcd_size(2, 8);
 	m_lcdc->set_pixel_update_cb(FUNC(ctk2000_state::lcd_update));
 

src/mame/casio/ctk551.cpp

@@ -574,7 +574,7 @@ void ctk551_state::ctk601(machine_config& config)
 	m_maincpu->write_sci_tx<0>().set(mdout, FUNC(midi_port_device::write_txd));
 
 	// LCD
-	HD44780(config, m_lcdc, 250'000); // TODO: Wrong device type, should be SED1278F2A (custom mask variant of SED1278F0A?); clock not measured, datasheet typical clock used
+	HD44780(config, m_lcdc, 270'000); // TODO: Wrong device type, should be SED1278F2A (custom mask variant of SED1278F0A?); clock not measured, datasheet typical clock used
 	m_lcdc->set_lcd_size(2, 8);
 
 	auto& screen = SCREEN(config, "screen", SCREEN_TYPE_SVG);
@@ -617,7 +617,7 @@ void ctk551_state::ctk551(machine_config &config)
 	m_maincpu->write_sci_tx<0>().set(mdout, FUNC(midi_port_device::write_txd));
 
 	// LCD
-	HD44780(config, m_lcdc, 250'000); // TODO: Wrong device type, should be SED1278F2A (custom mask variant of SED1278F0A?); clock not measured, datasheet typical clock used
+	HD44780(config, m_lcdc, 270'000); // TODO: Wrong device type, should be SED1278F2A (custom mask variant of SED1278F0A?); clock not measured, datasheet typical clock used
 	m_lcdc->set_lcd_size(2, 8);
 
 	auto &screen = SCREEN(config, "screen", SCREEN_TYPE_SVG);

src/mame/casio/cz1.cpp

@@ -869,7 +869,7 @@ void cz1_state::mz1(machine_config &config)
 
 	PALETTE(config, "palette", FUNC(cz1_state::cz1_palette), 3);
 
-	HD44780(config, m_hd44780, 250'000); // TODO: clock not measured, datasheet typical clock used
+	HD44780(config, m_hd44780, 270'000); // TODO: clock not measured, datasheet typical clock used
 	m_hd44780->set_lcd_size(2, 16);
 	m_hd44780->set_function_set_at_any_time();
 	m_hd44780->set_pixel_update_cb(FUNC(cz1_state::lcd_pixel_update));

src/mame/casio/cz101.cpp

@@ -475,7 +475,7 @@ void cz101_state::cz101(machine_config &config)
 
 	PALETTE(config, "palette", FUNC(cz101_state::cz101_palette), 3);
 
-	HD44780(config, m_hd44780, 250'000); // TODO: clock not measured, datasheet typical clock used
+	HD44780(config, m_hd44780, 270'000); // TODO: clock not measured, datasheet typical clock used
 	m_hd44780->set_lcd_size(2, 16);
 	m_hd44780->set_function_set_at_any_time();
 	m_hd44780->set_pixel_update_cb(FUNC(cz101_state::lcd_pixel_update));

src/mame/casio/ld50.cpp

@@ -277,7 +277,7 @@ void ld50_state::ld50(machine_config &config)
 	m_maincpu->port_out_cb<3>().set(FUNC(ld50_state::port3_w));
 
 	// LCD
-	HD44780(config, m_lcdc, 250'000); // TODO: clock not measured, datasheet typical clock used
+	HD44780(config, m_lcdc, 270'000); // TODO: clock not measured, datasheet typical clock used
 	m_lcdc->set_lcd_size(2, 8);
 	m_lcdc->set_pixel_update_cb(FUNC(ld50_state::lcd_update));
 

src/mame/casio/rz1.cpp

@@ -430,7 +430,7 @@ void rz1_state::rz1(machine_config &config)
 
 	PALETTE(config, "palette", FUNC(rz1_state::rz1_palette), 3);
 
-	HD44780(config, m_hd44780, 250'000); // TODO: clock not measured, datasheet typical clock used
+	HD44780(config, m_hd44780, 270'000); // TODO: clock not measured, datasheet typical clock used
 	m_hd44780->set_lcd_size(1, 16);
 	m_hd44780->set_pixel_update_cb(FUNC(rz1_state::lcd_pixel_update));
 

src/mame/emusys/emax.cpp

@@ -222,7 +222,7 @@ void emax_state::emax(machine_config &config)
 	screen.set_visarea(0, 16*6-1, 0, 16-1);
 	screen.set_palette("palette");
 
-	HD44780(config, m_lcdc, 250'000); // TODO: clock not measured, datasheet typical clock used
+	HD44780(config, m_lcdc, 270'000); // TODO: clock not measured, datasheet typical clock used
 	m_lcdc->set_lcd_size(2, 16);
 	m_lcdc->set_pixel_update_cb(FUNC(emax_state::pixel_update));
 
@@ -262,7 +262,7 @@ void emax_state::emax2(machine_config &config)
 	screen.set_visarea(0, 16*6-1, 0, 16-1);
 	screen.set_palette("palette");
 
-	HD44780(config, m_lcdc, 250'000); // TODO: clock not measured, datasheet typical clock used
+	HD44780(config, m_lcdc, 270'000); // TODO: clock not measured, datasheet typical clock used
 	m_lcdc->set_lcd_size(2, 16);
 	m_lcdc->set_pixel_update_cb(FUNC(emax_state::pixel_update));
 

src/mame/emusys/emu3.cpp

@@ -251,7 +251,7 @@ void emu3_state::emu3(machine_config &config)
 	SCC85230(config, m_scc, 16_MHz_XTAL / 4);
 	m_scc->out_int_callback().set(*this, FUNC(emu3_state::irq_w<SCCINT>)).invert();
 
-	HD44780(config, m_lcdc, 250'000); // TODO: clock not measured, datasheet typical clock used
+	HD44780(config, m_lcdc, 270'000); // TODO: clock not measured, datasheet typical clock used
 	m_lcdc->set_lcd_size(4, 20);
 
 	PALETTE(config, "palette", FUNC(emu3_state::palette_init), 2);

src/mame/emusys/emu68k.cpp

@@ -142,7 +142,7 @@ void emu68k_state::add_lcd(machine_config &config)
 
 	PALETTE(config, "palette", FUNC(emu68k_state::palette_init), 2);
 
-	hd44780_device &lcdc(HD44780(config, "lcdc", 250'000)); // TODO: clock not measured, datasheet typical clock used
+	hd44780_device &lcdc(HD44780(config, "lcdc", 270'000)); // TODO: clock not measured, datasheet typical clock used
 	lcdc.set_lcd_size(2, 16);
 	lcdc.set_pixel_update_cb(FUNC(emu68k_state::lcd_pixel_update));
 }

src/mame/kawai/r100.cpp

@@ -132,7 +132,7 @@ void kawai_r100_state::r100(machine_config &config)
 
 	PALETTE(config, "palette", palette_device::MONOCHROME_INVERTED);
 
-	HD44780(config, m_lcdc, 250'000); // TODO: clock not measured, datasheet typical clock used
+	HD44780(config, m_lcdc, 270'000); // TODO: clock not measured, datasheet typical clock used
 	m_lcdc->set_lcd_size(2, 16);
 	m_lcdc->set_pixel_update_cb(FUNC(kawai_r100_state::pixel_update));
 }

src/mame/korg/korgds8.cpp

@@ -229,7 +229,7 @@ void korg_ds8_state::ds8(machine_config &config)
 
 	PALETTE(config, "palette", FUNC(korg_ds8_state::palette_init_ds8), 2);
 
-	hd44780_device &lcdc(HD44780(config, "lcdc", 250'000)); // TODO: clock not measured, datasheet typical clock used
+	hd44780_device &lcdc(HD44780(config, "lcdc", 270'000)); // TODO: clock not measured, datasheet typical clock used
 	lcdc.set_lcd_size(2, 40);
 	lcdc.set_pixel_update_cb(FUNC(korg_ds8_state::lcd_pixel_update));
 

src/mame/korg/korgdss1.cpp

@@ -466,7 +466,7 @@ void korg_dss1_state::klm780(machine_config &config)
 
 	PALETTE(config, "palette", FUNC(korg_dss1_state::palette_init_dss1), 2);
 
-	HD44780(config, m_lcdc, 250'000); // TODO: clock not measured, datasheet typical clock used
+	HD44780(config, m_lcdc, 270'000); // TODO: clock not measured, datasheet typical clock used
 	m_lcdc->set_lcd_size(2, 20);
 	m_lcdc->set_pixel_update_cb(FUNC(korg_dss1_state::lcd_pixel_update));
 }

src/mame/korg/korgm1.cpp

@@ -251,7 +251,7 @@ void korgm1_state::korgm1(machine_config &config)
 
 	PALETTE(config, "palette", FUNC(korgm1_state::palette_init), 2);
 
-	HD44780(config, m_lcdc, 250'000); // TODO: clock not measured, datasheet typical clock used
+	HD44780(config, m_lcdc, 270'000); // TODO: clock not measured, datasheet typical clock used
 	m_lcdc->set_lcd_size(2, 40);
 	m_lcdc->set_pixel_update_cb(FUNC(korgm1_state::lcd_pixel_update));
 

src/mame/makerbot/replicator.cpp

@@ -734,7 +734,7 @@ void replicator_state::replicator(machine_config &config)
 	PALETTE(config, "palette", FUNC(replicator_state::palette_init), 2);
 	GFXDECODE(config, "gfxdecode", "palette", gfx_replicator);
 
-	HD44780(config, "hd44780", 250'000).set_lcd_size(4, 20); // TODO: clock not measured, datasheet typical clock used
+	HD44780(config, "hd44780", 270'000).set_lcd_size(4, 20); // TODO: clock not measured, datasheet typical clock used
 
 	/* sound hardware */
 	/* A piezo is connected to the PORT G bit 5 (OC0B pin driven by Timer/Counter #4) */

src/mame/misc/piggypas.cpp

@@ -220,7 +220,7 @@ void piggypas_state::piggypas(machine_config &config)
 	PALETTE(config, "palette").set_entries(2);
 	config.set_default_layout(layout_piggypas);
 
-	HD44780(config, m_hd44780, 250'000); // TODO: clock not measured, datasheet typical clock used
+	HD44780(config, m_hd44780, 270'000); // TODO: clock not measured, datasheet typical clock used
 	m_hd44780->set_lcd_size(1, 16);
 	m_hd44780->set_pixel_update_cb(FUNC(piggypas_state::piggypas_pixel_update));
 

src/mame/multitech/mpf1_88.cpp

@@ -338,7 +338,7 @@ void mpf1_88_state::mpf1_88(machine_config &config)
 
 	PALETTE(config, "palette", FUNC(mpf1_88_state::lcd_palette), 3);
 
-	hd44780_device &lcdc(HD44780(config, "lcdc", 250'000)); // TODO: clock not measured, datasheet typical clock used
+	hd44780_device &lcdc(HD44780(config, "lcdc", 270'000)); // TODO: clock not measured, datasheet typical clock used
 	lcdc.set_lcd_size(2, 20);
 	lcdc.set_pixel_update_cb(FUNC(mpf1_88_state::lcd_pixel_update));
 	lcdc.set_function_set_at_any_time(true);

src/mame/psion/psion.cpp

@@ -548,7 +548,7 @@ void psion_state::psion_2lines(machine_config &config)
 	PALETTE(config, "palette", FUNC(psion_state::psion_palette), 2);
 	GFXDECODE(config, "gfxdecode", "palette", gfx_psion);
 
-	HD44780(config, m_lcdc, 250'000); // TODO: Wrong device? Custom? clock not measured, datasheet typical clock used
+	HD44780(config, m_lcdc, 270'000); // TODO: Wrong device? Custom? clock not measured, datasheet typical clock used
 	m_lcdc->set_lcd_size(2, 16);
 
 	/* sound hardware */

src/mame/roland/alphajuno.cpp

@@ -142,7 +142,7 @@ void alphajuno_state::ajuno1(machine_config &config)
 
 	PALETTE(config, "palette", FUNC(alphajuno_state::palette_init), 2);
 
-	HD44780(config, m_lcdc, 250'000); // TODO: clock not measured, datasheet typical clock used
+	HD44780(config, m_lcdc, 270'000); // TODO: clock not measured, datasheet typical clock used
 	m_lcdc->set_lcd_size(2, 8);
 	m_lcdc->set_pixel_update_cb(FUNC(alphajuno_state::lcd_pixel_update));
 	m_lcdc->set_busy_factor(0.005f);
@@ -181,7 +181,7 @@ void alphajuno_state::mks50(machine_config &config)
 
 	PALETTE(config, "palette", FUNC(alphajuno_state::palette_init), 2);
 
-	HD44780(config, m_lcdc, 250'000); // TODO: clock not measured, datasheet typical clock used
+	HD44780(config, m_lcdc, 270'000); // TODO: clock not measured, datasheet typical clock used
 	m_lcdc->set_lcd_size(2, 8);
 	m_lcdc->set_pixel_update_cb(FUNC(alphajuno_state::lcd_pixel_update));
 	m_lcdc->set_busy_factor(0.05f);

src/mame/roland/roland_s10.cpp

@@ -238,7 +238,7 @@ void roland_s10_state::s10(machine_config &config)
 
 	PALETTE(config, "palette", FUNC(roland_s10_state::palette_init), 2);
 
-	HD44780(config, m_lcdc, 250'000); // TODO: clock not measured, datasheet typical clock used
+	HD44780(config, m_lcdc, 270'000); // TODO: clock not measured, datasheet typical clock used
 	m_lcdc->set_lcd_size(2, 8);
 	m_lcdc->set_pixel_update_cb(FUNC(roland_s10_state::lcd_pixel_update));
 	m_lcdc->set_busy_factor(0.005f);

src/mame/sega/model1io2.cpp

@@ -199,7 +199,7 @@ void model1io2_device::device_add_mconfig(machine_config &config)
 
 	PALETTE(config, "palette", FUNC(model1io2_device::lcd_palette), 3);
 
-	HD44780(config, m_lcd, 250'000); // TODO: clock not measured, datasheet typical clock used
+	HD44780(config, m_lcd, 270'000); // TODO: clock not measured, datasheet typical clock used
 	m_lcd->set_lcd_size(2, 20);
 	m_lcd->set_pixel_update_cb(FUNC(model1io2_device::lcd_pixel_update));
 }

src/mame/sega/speedbsk.cpp

@@ -452,7 +452,7 @@ void speedbsk_state::speedbsk(machine_config &config)
 
 	PALETTE(config, "palette", FUNC(speedbsk_state::lcd_palette), 3);
 
-	HD44780(config, m_lcd, 250'000); // TODO: clock not measured, datasheet typical clock used
+	HD44780(config, m_lcd, 270'000); // TODO: clock not measured, datasheet typical clock used
 	m_lcd->set_lcd_size(2, 20);
 	m_lcd->set_pixel_update_cb(FUNC(speedbsk_state::lcd_pixel_update));
 

src/mame/skeleton/600cat.cpp

@@ -142,7 +142,7 @@ void _600cat_state::_600cat(machine_config &config)
 
 	PALETTE(config, m_palette, FUNC(_600cat_state::lcd_palette), 3);
 
-	HD44780(config, m_lcdc, 250'000); // TODO: clock not measured, datasheet typical clock used
+	HD44780(config, m_lcdc, 270'000); // TODO: clock not measured, datasheet typical clock used
 	m_lcdc->set_lcd_size(4, 20);
 	m_lcdc->set_pixel_update_cb(FUNC(_600cat_state::lcd_pixel_update));
 

src/mame/skeleton/adacp150.cpp

@@ -216,7 +216,7 @@ void adacp150_state::adacp150(machine_config &config)
 	screen.set_visarea(0, 16*6-1, 0, 16-1);
 	screen.set_palette("palette");
 
-	HD44780(config, m_lcdc, 250'000); // TODO: clock not measured, datasheet typical clock used
+	HD44780(config, m_lcdc, 270'000); // TODO: clock not measured, datasheet typical clock used
 	m_lcdc->set_lcd_size(2, 20);
 	m_lcdc->set_pixel_update_cb(FUNC(adacp150_state::pixel_update));
 

src/mame/skeleton/airbase99.cpp

@@ -73,7 +73,7 @@ void airbase99_state::airbase99(machine_config &config)
 
 	PALETTE(config, "palette", palette_device::MONOCHROME_INVERTED);
 
-	hd44780_device &lcdc(HD44780(config, "lcdc", 250'000)); // TODO: clock not measured, datasheet typical clock used
+	hd44780_device &lcdc(HD44780(config, "lcdc", 270'000)); // TODO: clock not measured, datasheet typical clock used
 	lcdc.set_lcd_size(2, 20);
 	lcdc.set_pixel_update_cb(FUNC(airbase99_state::pixel_update));
 }

src/mame/skeleton/eurit.cpp

@@ -170,7 +170,7 @@ void eurit_state::eurit30(machine_config &config)
 
 	PALETTE(config, "palette", FUNC(eurit_state::palette_init), 2);
 
-	hd44780_device &lcdc(SED1278(config, "lcdc", 250'000)); // TODO: clock not measured, datasheet typical clock used
+	hd44780_device &lcdc(SED1278(config, "lcdc", 270'000)); // TODO: clock not measured, datasheet typical clock used
 	lcdc.set_default_bios_tag("0b");
 	lcdc.set_lcd_size(2, 20);
 	lcdc.set_pixel_update_cb(FUNC(eurit_state::lcd_pixel_update));

src/mame/skeleton/gm1000.cpp

@@ -100,7 +100,7 @@ void gm1000_state::gm1000(machine_config &config)
 
 	PALETTE(config, "palette", palette_device::MONOCHROME_INVERTED);
 
-	hd44780_device &lcdc(HD44780(config, "lcdc", 250'000)); // TODO: clock not measured, datasheet typical clock used
+	hd44780_device &lcdc(HD44780(config, "lcdc", 270'000)); // TODO: clock not measured, datasheet typical clock used
 	lcdc.set_lcd_size(2, 24);
 	lcdc.set_pixel_update_cb(FUNC(gm1000_state::lcd_pixel_update));
 	lcdc.set_function_set_at_any_time(true);

src/mame/skeleton/hprot1.cpp

@@ -272,7 +272,7 @@ void hprot1_state::hprot1(machine_config &config)
 	PALETTE(config, "palette", FUNC(hprot1_state::hprot1_palette), 2);
 	GFXDECODE(config, "gfxdecode", "palette", gfx_hprot1);
 
-	HD44780(config, m_lcdc, 250'000); /* TODO: clock not measured, datasheet typical clock used */
+	HD44780(config, m_lcdc, 270'000); /* TODO: clock not measured, datasheet typical clock used */
 	m_lcdc->set_lcd_size(2, 16);
 	m_lcdc->set_pixel_update_cb(FUNC(hprot1_state::hprot1_pixel_update));
 

src/mame/skeleton/icatel.cpp

@@ -263,7 +263,7 @@ void icatel_state::icatel(machine_config &config)
 	PALETTE(config, "palette", FUNC(icatel_state::icatel_palette), 2);
 	GFXDECODE(config, "gfxdecode", "palette", gfx_icatel);
 
-	HD44780(config, m_lcdc, 250'000); /* TODO: clock not measured, datasheet typical clock used */
+	HD44780(config, m_lcdc, 270'000); /* TODO: clock not measured, datasheet typical clock used */
 	m_lcdc->set_lcd_size(2, 16);
 	m_lcdc->set_pixel_update_cb(FUNC(icatel_state::icatel_pixel_update));
 }

src/mame/skeleton/ml20.cpp

@@ -274,7 +274,7 @@ void ml20_state::ml20(machine_config &config)
 
 	PALETTE(config, "palette", FUNC(ml20_state::lcd_palette), 3);
 
-	HD44780(config, m_lcdc, 250'000); // TODO: clock not measured, datasheet typical clock used
+	HD44780(config, m_lcdc, 270'000); // TODO: clock not measured, datasheet typical clock used
 	m_lcdc->set_lcd_size(2, 16);
 	m_lcdc->set_pixel_update_cb(FUNC(ml20_state::lcd_pixel_update));
 

src/mame/skeleton/mtd1256.cpp

@@ -138,7 +138,7 @@ void mtd1256_state::mtd1256(machine_config &config)
 	screen.set_visarea(0, 20*6-1, 0, 32-1);
 	screen.set_palette("palette");
 
-	hd44780_device &hd44780(HD44780(config, "lcdc", 250'000)); // TODO: clock not measured, datasheet typical clock used
+	hd44780_device &hd44780(HD44780(config, "lcdc", 270'000)); // TODO: clock not measured, datasheet typical clock used
 	hd44780.set_lcd_size(2, 16);
 	hd44780.set_pixel_update_cb(FUNC(mtd1256_state::pixel_update));
 

src/mame/skeleton/rd100.cpp

@@ -264,7 +264,7 @@ void rd100_state::rd100(machine_config &config)
 	screen.set_visarea(0, 16*6-1, 0, 16-1);
 	screen.set_palette("palette");
 
-	hd44780_device &hd44780(HD44780(config, "hd44780", 250'000)); // TODO: clock not measured, datasheet typical clock used
+	hd44780_device &hd44780(HD44780(config, "hd44780", 270'000)); // TODO: clock not measured, datasheet typical clock used
 	hd44780.set_lcd_size(2, 16);
 	hd44780.set_pixel_update_cb(FUNC(rd100_state::pixel_update));
 

src/mame/skeleton/sk101bl.cpp

@@ -170,7 +170,7 @@ void sk101bl_state::sk101bl(machine_config &config)
 	screen.set_visarea(0, 16*6-1, 0, 10-1);
 	screen.set_palette("palette");
 
-	HD44780(config, m_lcdc, 250'000).set_lcd_size(1, 16); // TODO: clock not measured, datasheet typical clock used
+	HD44780(config, m_lcdc, 270'000).set_lcd_size(1, 16); // TODO: clock not measured, datasheet typical clock used
 	m_lcdc->set_pixel_update_cb(FUNC(sk101bl_state::pixel_update));
 
 	PALETTE(config, "palette").set_entries(2);

src/mame/skeleton/ti630.cpp

@@ -162,7 +162,7 @@ void ti630_state::ti630(machine_config &config)
 	PALETTE(config, "palette", FUNC(ti630_state::ti630_palette), 2);
 	GFXDECODE(config, "gfxdecode", "palette", gfx_ti630);
 
-	HD44780(config, m_lcdc, 250'000); // TODO: clock not measured, datasheet typical clock used
+	HD44780(config, m_lcdc, 270'000); // TODO: clock not measured, datasheet typical clock used
 	m_lcdc->set_lcd_size(2, 16);
 }
 

src/mame/sony/dpsv55.cpp

@@ -104,7 +104,7 @@ void dpsv55_state::dpsv55(machine_config &config)
 
 	PALETTE(config, "palette", palette_device::MONOCHROME_INVERTED);
 
-	HD44780(config, m_lcdc, 250'000); // TODO: clock not measured, datasheet typical clock used
+	HD44780(config, m_lcdc, 270'000); // TODO: clock not measured, datasheet typical clock used
 	m_lcdc->set_lcd_size(2, 20);
 	m_lcdc->set_pixel_update_cb(FUNC(dpsv55_state::pixel_update));
 

src/mame/vtech/lcmate2.cpp

@@ -255,7 +255,7 @@ void lcmate2_state::lcmate2(machine_config &config)
 	PALETTE(config, "palette", FUNC(lcmate2_state::lcmate2_palette), 2);
 	GFXDECODE(config, "gfxdecode", "palette", gfx_lcmate2);
 
-	HD44780(config, m_lcdc, 250'000); // TODO: clock not measured, datasheet typical clock used
+	HD44780(config, m_lcdc, 270'000); // TODO: clock not measured, datasheet typical clock used
 	m_lcdc->set_lcd_size(2, 20);
 
 	NVRAM(config, "nvram", nvram_device::DEFAULT_ALL_0);

src/mame/vtech/pc2000.cpp

@@ -746,7 +746,7 @@ void pc2000_state::pc2000(machine_config &config)
 {
 	pc2000gen(config);
 
-	HD44780(config, m_lcdc, 250'000); // TODO: clock not measured, datasheet typical clock used
+	HD44780(config, m_lcdc, 270'000); // TODO: clock not measured, datasheet typical clock used
 	m_lcdc->set_lcd_size(2, 20);
 }
 
@@ -754,7 +754,7 @@ void pc2000_state::pc2000eur(machine_config &config)
 {
 	pc2000gen(config);
 
-	SED1278(config, m_lcdc, 250'000); // TODO: clock not measured, datasheet typical clock used
+	SED1278(config, m_lcdc, 270'000); // TODO: clock not measured, datasheet typical clock used
 	m_lcdc->set_default_bios_tag("0b");
 	m_lcdc->set_lcd_size(2, 20);
 }

src/mame/yamaha/fb01.cpp

@@ -182,8 +182,8 @@ void fb01_state::fb01(machine_config &config)
 
 	PALETTE(config, "palette", FUNC(fb01_state::fb01_palette), 2);
 
-	hd44780_device &hd44780(HD44780(config, "hd44780", 250'000)); // TODO: clock not measured, datasheet typical clock used
-	hd44780.set_lcd_size(2, 8);   // 2x8 displayed as 1x16
+	hd44780_device &hd44780(HD44780(config, "hd44780", 270'000)); // TODO: clock not measured, datasheet typical clock used
+	hd44780.set_lcd_size(2, 8); // 2x8 displayed as 1x16
 	hd44780.set_pixel_update_cb(FUNC(fb01_state::fb01_pixel_update));
 
 	I8251(config, m_upd71051, XTAL(4'000'000));

src/mame/yamaha/ymdx11.cpp

@@ -113,7 +113,7 @@ void yamaha_dx11_state::dx11(machine_config &config)
 
 	PALETTE(config, "palette", FUNC(yamaha_dx11_state::palette_init), 2);
 
-	hd44780_device &lcdc(HD44780(config, "lcdc", 250'000)); // TODO: clock not measured, datasheet typical clock used
+	hd44780_device &lcdc(HD44780(config, "lcdc", 270'000)); // TODO: clock not measured, datasheet typical clock used
 	lcdc.set_lcd_size(2, 16);
 	lcdc.set_pixel_update_cb(FUNC(yamaha_dx11_state::lcd_pixel_update));
 

src/mame/yamaha/ymdx7.cpp

@@ -302,7 +302,7 @@ void yamaha_dx7_state::dx7(machine_config &config)
 
 	PALETTE(config, "palette", FUNC(yamaha_dx7_state::palette_init), 2);
 
-	HD44780(config, m_lcdc, 250'000); // TODO: clock not measured, datasheet typical clock used
+	HD44780(config, m_lcdc, 270'000); // TODO: clock not measured, datasheet typical clock used
 	m_lcdc->set_lcd_size(2, 16);
 	m_lcdc->set_pixel_update_cb(FUNC(yamaha_dx7_state::lcd_pixel_update));
 }

src/mame/yamaha/ymdx9.cpp

@@ -277,7 +277,7 @@ void yamaha_dx9_state::dx9(machine_config &config)
 
 	PALETTE(config, "palette", FUNC(yamaha_dx9_state::palette_init), 3);
 
-	hd44780_device &lcdc(HD44780(config, "lcdc", 250'000)); // TODO: clock not measured, datasheet typical clock used
+	hd44780_device &lcdc(HD44780(config, "lcdc", 270'000)); // TODO: clock not measured, datasheet typical clock used
 	lcdc.set_lcd_size(2, 16);
 	lcdc.set_pixel_update_cb(FUNC(yamaha_dx9_state::lcd_pixel_update));
 

src/mame/yamaha/ymrx15.cpp

@@ -75,7 +75,7 @@ void rx15_state::rx15(machine_config &config)
 
 	PALETTE(config, "palette", palette_device::MONOCHROME_INVERTED);
 
-	hd44780_device &lcdc(HD44780(config, "lcdc", 250'000)); // TODO: clock not measured, datasheet typical clock used
+	hd44780_device &lcdc(HD44780(config, "lcdc", 270'000)); // TODO: clock not measured, datasheet typical clock used
 	lcdc.set_lcd_size(2, 8);
 	lcdc.set_pixel_update_cb(FUNC(rx15_state::pixel_update));
 

src/mame/yamaha/ymtx81z.cpp

@@ -153,7 +153,7 @@ void ymtx81z_state::tx81z(machine_config &config)
 
 	config.set_default_layout(layout_tx81z);
 
-	hd44780_device &lcdc(HD44780(config, "lcdc", 250'000)); // TODO: clock not measured, datasheet typical clock used
+	hd44780_device &lcdc(HD44780(config, "lcdc", 270'000)); // TODO: clock not measured, datasheet typical clock used
 	lcdc.set_lcd_size(2, 16);
 	lcdc.set_pixel_update_cb(FUNC(ymtx81z_state::lcd_pixel_update));