c64sid.h

/*
 * This file is part of libsidplayfp, a SID player engine.
 *
 * Copyright 2013-2024 Leandro Nini <drfiemost@users.sourceforge.net>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
 
#ifndef C64SID_H
#define C64SID_H
 
#include "Banks/Bank.h"
 
#include "sidcxx11.h"
 
#include <algorithm>
#include <iterator>
#include <cstring>
#include <stdint.h>
 
namespace libsidplayfp
{
 
class c64sid : public Bank
{
private:
    uint8_t lastpoke[0x20];
 
protected:
    virtual ~c64sid() = default;
 
    virtual uint8_t read(uint_least8_t addr) = 0;
    virtual void writeReg(uint_least8_t addr, uint8_t data) = 0;
 
    virtual void reset(uint8_t volume) = 0;
 
public:
    void reset()
    {
        std::fill(std::begin(lastpoke), std::end(lastpoke), 0);
        reset(0xf);
    }
 
    // Bank functions
    void poke(uint_least16_t address, uint8_t value) override
    {
        lastpoke[address & 0x1f] = value;
        writeReg(address & 0x1f, value);
    }
    uint8_t peek(uint_least16_t address) override { return read(address & 0x1f); }
 
    void getStatus(uint8_t regs[0x20]) const { std::memcpy(regs, lastpoke, 0x20); }
};
 
}
 
#endif // C64SID_H