/* Copyright notice for this file:
 * Copyright (C) 2018
 *
 * 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
 *
 * This mapper was added by retrowertz for Libretro port of QuickNES.
 *
 * Mapper 180 Crazy Climber
 *
 */

#include "Nes_Mapper.h"

template <bool _is152>
class Mapper_74x161x162x32 : public Nes_Mapper
{
  public:
  Mapper_74x161x162x32()
  {
    register_state(&bank, 1);
  }

  virtual void reset_state()
  {
    if (_is152 == 0)
      bank = ~0;
  }

  virtual void apply_mapping()
  {
    if (_is152)
      write(0, 0, bank);
    else
    {
      intercept_writes(0x6000, 1);
      write_intercepted(0, 0x6000, bank);
    }
  }

  virtual bool write_intercepted(nes_time_t, nes_addr_t addr, int data)
  {
    if ((addr != 0x6000) || _is152)
      return false;

    bank = data;
    set_prg_bank(0x8000, bank_32k, (bank >> 4) & 0x03);
    set_chr_bank(0x0000, bank_8k, ((bank >> 4) & 0x04) | (bank & 0x03));

    return true;
  }

  virtual void write(nes_time_t, nes_addr_t addr, int data)
  {
    if (_is152 == 0) return;

    bank = handle_bus_conflict(addr, data);
    set_prg_bank(0x8000, bank_16k, (bank >> 4) & 0x07);
    set_chr_bank(0x0000, bank_8k, bank & 0x0F);
    mirror_single((bank >> 7) & 0x01);
  }

  uint8_t bank;
};

void register_mapper_70();
void register_mapper_70()
{
  register_mapper<Mapper_74x161x162x32<true>>(70);
}