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m72.cpp : Fix sample rate for m72 PCBs, Add notes (#4291)

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* m72.cpp : Fix sample rate for m72 PCBs, Add notes

* m72.cpp : Fix regression

* m72.cpp : Fix copy-n-paste error
This commit is contained in:
cam900 2019-04-01 05:57:01 +09:00 committed by R. Belmont
parent 2dc938da29
commit 060abb5682
1 changed files with 6 additions and 3 deletions
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9
src/mame/drivers/m72.cpp
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@ -1863,7 +1863,8 @@ void m72_state::m72_base(machine_config &config)
void m72_state::m72(machine_config &config)
{
m72_base(config);
m_soundcpu->set_periodic_int(FUNC(m72_state::fake_nmi), attotime::from_hz(128*55)); /* clocked by V1? (Vigilante) */
/* Sample rate verified (Gallop : https://youtu.be/aozd0dbPzOw) */
m_soundcpu->set_periodic_int(FUNC(m72_state::fake_nmi), attotime::from_hz(32000000/8/512));
/* IRQs are generated by main Z80 and YM2151 */
}
@ -1913,7 +1914,8 @@ void m72_state::m72_xmultipl(machine_config &config)
m72_8751(config);
m_maincpu->set_addrmap(AS_PROGRAM, &m72_state::xmultiplm72_map);
m_soundcpu->set_periodic_int(FUNC(m72_state::nmi_line_pulse), attotime::from_hz(128*55)); /* clocked by V1? (Vigilante) */
/* Sample rate verified (Gallop : https://youtu.be/aozd0dbPzOw) */
m_soundcpu->set_periodic_int(FUNC(m72_state::nmi_line_pulse), attotime::from_hz(32000000/8/512));
/* IRQs are generated by main Z80 and YM2151 */
}
@ -1922,7 +1924,8 @@ void m72_state::m72_dbreed(machine_config &config)
m72_base(config);
m_maincpu->set_addrmap(AS_PROGRAM, &m72_state::dbreedm72_map);
m_soundcpu->set_periodic_int(FUNC(m72_state::nmi_line_pulse), attotime::from_hz(128*55)); /* clocked by V1? (Vigilante) */
/* Sample rate verified (Gallop : https://youtu.be/aozd0dbPzOw) */
m_soundcpu->set_periodic_int(FUNC(m72_state::nmi_line_pulse), attotime::from_hz(32000000/8/512));
/* IRQs are generated by main Z80 and YM2151 */
}