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-rw-r--r--src/devices/sound/lynx.h95
1 files changed, 95 insertions, 0 deletions
diff --git a/src/devices/sound/lynx.h b/src/devices/sound/lynx.h
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+++ b/src/devices/sound/lynx.h
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+// license:GPL-2.0+
+// copyright-holders:Peter Trauner
+#ifndef MAME_SOUND_LYNX_H
+#define MAME_SOUND_LYNX_H
+
+#pragma once
+
+
+class lynx_sound_device : public device_t, public device_sound_interface
+{
+public:
+ typedef device_delegate<void (void)> timer_delegate;
+
+ lynx_sound_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+
+ u8 read(offs_t offset);
+ void write(offs_t offset, u8 data);
+ void count_down(int nr);
+ template <typename... T> void set_timer_delegate(T &&... args) { m_timer_delegate.set(std::forward<T>(args)...); }
+
+protected:
+ struct LYNX_AUDIO {
+ struct {
+ //bool reset_done() const { return BIT(control1, 6); } // Reset timer done flag (not implemented)
+ bool integrate_mode() const { return BIT(control1, 5); } // Integrate mode
+ bool reload_en() const { return BIT(control1, 4); } // Reload enable
+ bool count_en() const { return BIT(control1, 3); } // Count enable
+ u8 timer_clock() const { return BIT(control1, 0, 3); } // Timer clock
+ bool linked() const { return timer_clock() == 0b111; } // Linked timer?
+
+ //bool last_clock() const { return BIT(control2, 2); } // Last clock (not implemented)
+ //bool borrow_in() const { return BIT(control2, 1); } // Borrow in (not implemented)
+ //bool borrow_out() const { return BIT(control2, 0); } // Borrow out (not implemented)
+
+ s8 volume = 0;
+ u8 feedback = 0;
+ s8 output = 0;
+ u8 shifter = 0;
+ u8 bakup = 0;
+ u8 control1 = 0;
+ u8 counter = 0;
+ u8 control2 = 0;
+ } reg;
+ u8 attenuation = 0;
+ u16 mask = 0; // 12-bit
+ u16 shifter = 0; // 12-bit
+ s16 ticks = 0;
+ s16 count = 0;
+ };
+
+ lynx_sound_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock);
+
+ // device-level overrides
+ virtual void device_start() override ATTR_COLD;
+ virtual void device_reset() override ATTR_COLD;
+ virtual void device_clock_changed() override;
+
+ // sound stream update overrides
+ virtual void sound_stream_update(sound_stream &stream) override;
+
+ void reset_channel(LYNX_AUDIO *channel);
+ void shift(int chan_nr);
+ void execute(int chan_nr);
+ void init();
+ void register_save();
+
+ sound_stream *m_mixer_channel;
+ timer_delegate m_timer_delegate; // this calls lynx_timer_count_down from the driver state
+
+ std::unique_ptr<int[]> m_shift_mask;
+ std::unique_ptr<int[]> m_shift_xor;
+ u8 m_attenuation_enable = 0;
+ u8 m_master_enable = 0;
+ LYNX_AUDIO m_audio[4];
+};
+
+
+class lynx2_sound_device : public lynx_sound_device
+{
+public:
+ lynx2_sound_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+
+protected:
+ // device-level overrides
+ virtual void device_start() override ATTR_COLD;
+
+ // sound stream update overrides
+ virtual void sound_stream_update(sound_stream &stream) override;
+};
+
+
+DECLARE_DEVICE_TYPE(LYNX_SND, lynx_sound_device)
+DECLARE_DEVICE_TYPE(LYNX2_SND, lynx2_sound_device)
+
+#endif // MAME_SOUND_LYNX_H