85 lines
1.6 KiB
C++
85 lines
1.6 KiB
C++
/*
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License: Zlib
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see https://gitlab.com/cam900/vgsound_emu/-/blob/main/LICENSE for more details
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Copyright holder(s): cam900
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Konami K005289 emulation core
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*/
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#ifndef _VGSOUND_EMU_SRC_K005289_HPP
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#define _VGSOUND_EMU_SRC_K005289_HPP
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#pragma once
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#include "../core/core.hpp"
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using namespace vgsound_emu;
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class k005289_core : public vgsound_emu_core
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{
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private:
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// k005289 timer classes
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class timer_t : public vgsound_emu_core
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{
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public:
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timer_t()
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: vgsound_emu_core("k005289_timer")
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, m_addr(0)
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, m_pitch(0)
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, m_freq(0)
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, m_counter(0)
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{
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}
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// internal state
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void reset();
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void tick();
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// accessors
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// Replace current frequency to lastest loaded pitch
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inline void update() { m_freq = m_pitch; }
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// setters
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// Load pitch data (address pin)
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inline void load(u16 pitch) { m_pitch = pitch; }
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// getters
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inline u8 addr() { return m_addr; }
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private:
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// registers
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u8 m_addr = 0; // external address pin
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u16 m_pitch = 0; // pitch
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u16 m_freq = 0; // current frequency
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s16 m_counter = 0; // frequency counter
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};
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public:
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// constructor
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k005289_core()
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: vgsound_emu_core("k005289")
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, m_timer{timer_t()}
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{
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}
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// internal state
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void reset();
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void tick();
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// accessors
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// TG1/2 pin
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inline void update(int voice) { m_timer[voice & 1].update(); }
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// setters
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// LD1/2 pin, A0...11 pin
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inline void load(int voice, u16 addr) { m_timer[voice & 1].load(addr); }
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// getters
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// 1QA...E/2QA...E pin
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inline u8 addr(int voice) { return m_timer[voice & 1].addr(); }
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private:
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std::array<timer_t, 2> m_timer;
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};
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#endif
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