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msx easi-speech: don't derive clock from system clock

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This commit is contained in:
hap 2023-04-13 23:25:02 +02:00
parent be377e8c2a
commit 7c3e992597
3 changed files with 3 additions and 7 deletions
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2
src/devices/bus/msx/cart/easi_speech.cpp
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@ -41,7 +41,7 @@ const tiny_rom_entry *msx_cart_easispeech_device::device_rom_region() const
void msx_cart_easispeech_device::device_add_mconfig(machine_config &config)
{
SP0256(config, m_speech, DERIVED_CLOCK(1, 1)); // frequency unknown, assuming the system clock is used.
SP0256(config, m_speech, 3120000); // frequency unknown (R/C osc)
if (parent_slot())
m_speech->add_route(ALL_OUTPUTS, soundin(), 1.0);
}

5
src/mame/namco/namco06.cpp
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@ -114,10 +114,8 @@ TIMER_CALLBACK_MEMBER( namco_06xx_device::nmi_generate )
m_rw[3](0, BIT(m_control, 4));
}
// During reads, the first NMI pulse is supressed to give the chip a
// During reads, the first NMI pulse is suppressed to give the chip a
// cycle to write.
if (m_timer_state && !m_read_stretch)
{
set_nmi(ASSERT_LINE);
@ -214,7 +212,6 @@ TIMER_CALLBACK_MEMBER( namco_06xx_device::ctrl_w_sync )
m_read_stretch = false;
}
uint8_t num_shifts = (m_control & 0xe0) >> 5;
uint8_t divisor = 1 << num_shifts;
attotime period = attotime::from_hz(clock() / divisor) / 2;

3
src/mame/namco/namco06.h
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@ -6,7 +6,6 @@
#pragma once
/* device get info callback */
class namco_06xx_device : public device_t
{
public:
@ -37,7 +36,7 @@ private:
TIMER_CALLBACK_MEMBER( ctrl_w_sync );
// internal state
emu_timer *m_nmi_timer = nullptr;
emu_timer *m_nmi_timer;
uint8_t m_control;
bool m_timer_state;
bool m_read_stretch;