69 lines
1.5 KiB
C++
69 lines
1.5 KiB
C++
/*
|
|
License: BSD-3-Clause
|
|
see https://gitlab.com/cam900/vgsound_emu/-/blob/V1/LICENSE for more details
|
|
|
|
Copyright holder(s): cam900
|
|
Modifiers and Contributors for Furnace: cam900
|
|
Konami K005289 emulation core
|
|
|
|
See k005289.cpp for more info.
|
|
*/
|
|
|
|
#include <algorithm>
|
|
#include <memory>
|
|
|
|
#ifndef _VGSOUND_EMU_K005289_HPP
|
|
#define _VGSOUND_EMU_K005289_HPP
|
|
|
|
#pragma once
|
|
|
|
namespace k005289
|
|
{
|
|
typedef unsigned char u8;
|
|
typedef unsigned short u16;
|
|
typedef signed short s16;
|
|
|
|
// get bitfield, bitfield(input, position, len)
|
|
template<typename T> T bitfield(T in, u8 pos, u8 len = 1)
|
|
{
|
|
return (in >> pos) & (len ? (T(1 << len) - 1) : 1);
|
|
}
|
|
}
|
|
|
|
using namespace k005289;
|
|
class k005289_core
|
|
{
|
|
public:
|
|
// accessors, getters, setters
|
|
u8 addr(int voice) { return m_voice[voice & 1].addr; } // 1QA...E/2QA...E pin
|
|
void load(int voice, u16 addr) { m_voice[voice & 1].load(addr); } // LD1/2 pin, A0...11 pin
|
|
void update(int voice) { m_voice[voice & 1].update(); } // TG1/2 pin
|
|
|
|
// internal state
|
|
void reset();
|
|
void tick();
|
|
|
|
private:
|
|
// k005289 voice structs
|
|
struct voice_t
|
|
{
|
|
// internal state
|
|
void reset();
|
|
void tick();
|
|
|
|
// accessors, getters, setters
|
|
void load(u16 addr) { pitch = addr; } // Load pitch data (address pin)
|
|
void update() { freq = pitch; } // Replace current frequency to lastest loaded pitch
|
|
|
|
// registers
|
|
u8 addr = 0; // external address pin
|
|
u16 pitch = 0; // pitch
|
|
u16 freq = 0; // current frequency
|
|
s16 counter = 0; // frequency counter
|
|
};
|
|
|
|
voice_t m_voice[2];
|
|
};
|
|
|
|
#endif
|