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-rw-r--r--src/devices/sound/multipcm.cpp4
-rw-r--r--src/emu/xtal.cpp1
-rw-r--r--src/mame/audio/segam1audio.cpp8
-rw-r--r--src/mame/drivers/ymmu5.cpp4
4 files changed, 9 insertions, 8 deletions
diff --git a/src/devices/sound/multipcm.cpp b/src/devices/sound/multipcm.cpp
index 3e974703372..f614f9f4ba8 100644
--- a/src/devices/sound/multipcm.cpp
+++ b/src/devices/sound/multipcm.cpp
@@ -481,7 +481,7 @@ multipcm_device::multipcm_device(const machine_config &mconfig, const char *tag,
void multipcm_device::device_start()
{
- const float clock_divider = 180.0f;
+ const float clock_divider = 224.0f;
m_rate = (float)clock() / clock_divider;
m_stream = stream_alloc(0, 2, m_rate);
@@ -622,7 +622,7 @@ void multipcm_device::device_start()
void multipcm_device::device_clock_changed()
{
- const float clock_divider = 180.0f;
+ const float clock_divider = 224.0f;
m_rate = (float)clock() / clock_divider;
m_stream->set_sample_rate(m_rate);
diff --git a/src/emu/xtal.cpp b/src/emu/xtal.cpp
index baf3f01ce73..afaa452544c 100644
--- a/src/emu/xtal.cpp
+++ b/src/emu/xtal.cpp
@@ -154,6 +154,7 @@ const double XTAL::known_xtals[] = {
8'960'000, /* 8.96_MHz_XTAL Casio CZ-101 (divided by 2 for Music LSI) */
9'000'000, /* 9_MHz_XTAL Homedata PCBs */
9'216'000, /* 9.216_MHz_XTAL Univac UTS 20 */
+ 9'400'000, /* 9.4_MHz_XTAL Yamaha MU-5 and TG-100 */
9'600'000, /* 9.6_MHz_XTAL WD37C65 second clock (for 300 KB/sec rate) */
9'732'000, /* 9.732_MHz_XTAL CTA Invader */
9'828'000, /* 9.828_MHz_XTAL Universal PCBs */
diff --git a/src/mame/audio/segam1audio.cpp b/src/mame/audio/segam1audio.cpp
index cce5ce2a3ae..3b5d844ce0b 100644
--- a/src/mame/audio/segam1audio.cpp
+++ b/src/mame/audio/segam1audio.cpp
@@ -58,21 +58,21 @@ void segam1audio_device::device_add_mconfig(machine_config &config)
SPEAKER(config, "lspeaker").front_left();
SPEAKER(config, "rspeaker").front_right();
- YM3438(config, m_ym, 8000000);
+ YM3438(config, m_ym, 8_MHz_XTAL);
m_ym->add_route(0, "lspeaker", 0.60);
m_ym->add_route(1, "rspeaker", 0.60);
- MULTIPCM(config, m_multipcm_1, 8000000);
+ MULTIPCM(config, m_multipcm_1, 10_MHz_XTAL);
m_multipcm_1->set_addrmap(0, &segam1audio_device::mpcm1_map);
m_multipcm_1->add_route(0, "lspeaker", 1.0);
m_multipcm_1->add_route(1, "rspeaker", 1.0);
- MULTIPCM(config, m_multipcm_2, 8000000);
+ MULTIPCM(config, m_multipcm_2, 10_MHz_XTAL);
m_multipcm_2->set_addrmap(0, &segam1audio_device::mpcm2_map);
m_multipcm_2->add_route(0, "lspeaker", 1.0);
m_multipcm_2->add_route(1, "rspeaker", 1.0);
- I8251(config, m_uart, 8000000); // T82C51, clock unknown
+ I8251(config, m_uart, 8_MHz_XTAL); // T82C51, clock unknown
m_uart->rxrdy_handler().set_inputline(m_audiocpu, M68K_IRQ_2);
m_uart->txd_handler().set(FUNC(segam1audio_device::output_txd));
diff --git a/src/mame/drivers/ymmu5.cpp b/src/mame/drivers/ymmu5.cpp
index 8414929f496..94265c2d08b 100644
--- a/src/mame/drivers/ymmu5.cpp
+++ b/src/mame/drivers/ymmu5.cpp
@@ -218,14 +218,14 @@ INPUT_PORTS_END
void mu5_state::mu5(machine_config &config)
{
/* basic machine hardware */
- H83002(config, m_maincpu, 10_MHz_XTAL);
+ H83002(config, m_maincpu, 10_MHz_XTAL); // clock verified by schematics
m_maincpu->set_addrmap(AS_PROGRAM, &mu5_state::mu5_map);
m_maincpu->set_addrmap(AS_IO, &mu5_state::mu5_io_map);
SPEAKER(config, "lspeaker").front_left();
SPEAKER(config, "rspeaker").front_right();
- MULTIPCM(config, m_ymw258, 7500000);
+ MULTIPCM(config, m_ymw258, 9.4_MHz_XTAL); // clock verified by schematics
m_ymw258->set_addrmap(0, &mu5_state::ymw258_map);
m_ymw258->add_route(0, "lspeaker", 1.0);
m_ymw258->add_route(1, "rspeaker", 1.0);