c64cpu.h

/*
 * This file is part of libsidplayfp, a SID player engine.
 *
 *  Copyright (C) 2012-2021 Leandro Nini
 *
 *  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 C64CPU_H
#define C64CPU_H
 
#ifdef HAVE_CONFIG_H
#  include "config.h"
#endif
 
#include "c64/mmu.h"
#include "CPU/mos6510.h"
 
#ifdef VICE_TESTSUITE
#  include <iostream>
#  include <cstdlib>
#endif
 
//#define PRINTSCREENCODES
 
#include "sidcxx11.h"
 
namespace libsidplayfp
{
#ifdef PRINTSCREENCODES
static const char CHRtab[256] =
{
  0x40,0x41,0x42,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0x4a,0x4b,0x4c,0x4d,0x4e,0x4f,
  0x50,0x51,0x52,0x53,0x54,0x55,0x56,0x57,0x58,0x59,0x5a,0x5b,0x01,0x01,0x01,0x01,
  0x20,0x21,0x01,0x23,0x24,0x25,0x26,0x27,0x28,0x29,0x2a,0x2b,0x2c,0x2d,0x2e,0x2f,
  0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x3a,0x3b,0x3c,0x3d,0x3e,0x3f,
  0x40,0x61,0x62,0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6a,0x6b,0x6c,0x6d,0x6e,0x6f,
  0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7a,0x5b,0x24,0x5d,0x20,0x20,
  // alternative: CHR$(92=0x5c) => ISO Latin-1(0xa3)
  0x2d,0x23,0x7c,0x2d,0x2d,0x2d,0x2d,0x7c,0x7c,0x5c,0x5c,0x2f,0x5c,0x5c,0x2f,0x2f,
  0x5c,0x23,0x5f,0x23,0x7c,0x2f,0x58,0x4f,0x23,0x7c,0x23,0x2b,0x7c,0x7c,0x26,0x5c,
  // 0x80-0xFF
  0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,
  0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,
  0x20,0x7c,0x23,0x2d,0x2d,0x7c,0x23,0x7c,0x23,0x2f,0x7c,0x7c,0x2f,0x5c,0x5c,0x2d,
  0x2f,0x2d,0x2d,0x7c,0x7c,0x7c,0x7c,0x2d,0x2d,0x2d,0x2f,0x5c,0x5c,0x2f,0x2f,0x23,
  0x20,0x41,0x42,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0x4a,0x4b,0x4c,0x4d,0x4e,0x4f,
  0x50,0x51,0x52,0x53,0x54,0x55,0x56,0x57,0x58,0x59,0x5a,0x2b,0x7c,0x7c,0x26,0x5c,
  0x20,0x7c,0x23,0x2d,0x2d,0x7c,0x23,0x7c,0x23,0x2f,0x7c,0x7c,0x2f,0x5c,0x5c,0x2d,
  0x2f,0x2d,0x2d,0x7c,0x7c,0x7c,0x7c,0x2d,0x2d,0x2d,0x2f,0x5c,0x5c,0x2f,0x2f,0x23
};
#endif
class c64cpubus final : public CPUDataBus
{
private:
    MMU &m_mmu;
 
protected:
    uint8_t cpuRead(uint_least16_t addr) override { return m_mmu.cpuRead(addr); }
 
    void cpuWrite(uint_least16_t addr, uint8_t data) override
    {
#ifdef PRINTSCREENCODES
        if (addr >= 0x0400 && addr <= 0x07ff)
        {
            std::cout << CHRtab[data];
        }
#endif
#ifdef VICE_TESTSUITE
        // for VICE tests
        if (addr == 0xd7ff)
        {
            if (data == 0)
            {
                std::cout << std::endl << "OK" << std::endl;
                exit(EXIT_SUCCESS);
            }
            else if (data == 0xff)
            {
                std::cout << std::endl << "KO" << std::endl;
                exit(EXIT_FAILURE);
            }
        }
#endif
        m_mmu.cpuWrite(addr, data);
    }
 
public:
    c64cpubus (MMU &mmu) :
        m_mmu(mmu) {}
};
 
}
 
#endif // C64CPU_H