player/Project/Src/NES/mapper/069.cpp

#include "nes_mapper.h"


// Mapper 69
void MAP69_Reset()
{
//  patch = 0;

//  // for Dynamite Batman
//  if(parent_NES->crc32() == 0xad28aef6) // Dynamite Batman
//  {
//    patch = 1;
//  }

//  // Init ExSound
//  parent_NES->apu->SelectExSound(32);

//  // set CPU bank pointers
//  set_CPU_banks(0,1,num_8k_ROM_banks-2,num_8k_ROM_banks-1);

  // set PPU bank pointers
  if(num_1k_VROM_banks)
  {
    set_PPU_banks(0,1,2,3,4,5,6,7);
  }

  MAPx->irq_enabled = 0;
  MAPx->irq_counter = 0;
}

void MAP69_MemoryWrite(uint16 addr, uint8 data)
{
  switch(addr & 0xE000)
  {
    case 0x8000:
      {
        MAPx->regs[0] = data;
      }
      break;

    case 0xA000:
      {
        switch(MAPx->regs[0] & 0x0F)
        {
          case 0x00:
            {
              set_PPU_bank0(data);
            }
            break;

          case 0x01:
            {
              set_PPU_bank1(data);
            }
            break;

          case 0x02:
            {
              set_PPU_bank2(data);
            }
            break;

          case 0x03:
            {
              set_PPU_bank3(data);
            }
            break;

          case 0x04:
            {
              set_PPU_bank4(data);
            }
            break;

          case 0x05:
            {
              set_PPU_bank5(data);
            }
            break;

          case 0x06:
            {
              set_PPU_bank6(data);
            }
            break;

          case 0x07:
            {
              set_PPU_bank7(data);
            }
            break;

          case 0x08:
            {
             // if(!patch)
              {
                if(!(data & 0x40))
                {
                  set_CPU_bank3(data);
                }
              }
            }
            break;

          case 0x09:
            {
              set_CPU_bank4(data);
            }
            break;

          case 0x0A:
            {
              set_CPU_bank5(data);
            }
            break;

          case 0x0B:
            {
              set_CPU_bank6(data);
            }
            break;

          case 0x0C:
            {
              data &= 0x03;
              if(data == 0)
              {
				 set_mirroring(0,1,0,1);//<2F><>ֱ<EFBFBD><D6B1><EFBFBD><EFBFBD>InfoNES_Mirroring( 1 );   //0101
				 //set_mirroring(NES_PPU::MIRROR_VERT);
              }
              else if(data == 1)
              {
				 set_mirroring(0,0,1,1);//ˮƽ<CBAE><C6BD><EFBFBD><EFBFBD>InfoNES_Mirroring( 0 );   //0011
				 //set_mirroring(NES_PPU::MIRROR_HORIZ);
              }
              else if(data == 2)
              {
                set_mirroring(0,0,0,0);
              }
              else
              {
                set_mirroring(1,1,1,1);
              }
            }
            break;

          case 0x0D:
            {
              MAPx->irq_enabled = data;
            }
            break;

          case 0x0E:
            {
              MAPx->irq_counter = (MAPx->irq_counter & 0xFF00) | data;
            }
            break;

          case 0x0F:
            {
              MAPx->irq_counter = (MAPx->irq_counter & 0x00FF) | (data << 8);
            }
            break;
        }
      }
      break;

    case 0xC000:
    case 0xE000:
      {
        //parent_NES->apu->ExWrite(addr, data);
      }
      break;
  }
}

void MAP69_HSync(int scanline)
{
  if(MAPx->irq_enabled)
  {
    if(MAPx->irq_counter <= 113)
    {
      CPU_IRQ;
      MAPx->irq_counter = 0;
    }
    else
    {
      MAPx->irq_counter -= 113;
    }
  }
}

void MAP69_Init()
{
	NES_Mapper->Reset = MAP69_Reset;
	NES_Mapper->Write = MAP69_MemoryWrite;
	NES_Mapper->HSync = MAP69_HSync;   
}