content: package com.grapeshot.halfnes.mappers;
  
  import com.grapeshot.halfnes.*;
  
  public class Mapper225 extends Mapper {
  
      @Override
      public void loadrom() throws BadMapperException {
          //needs to be in every mapper. Fill with initial cfg
          super.loadrom();
          for (int i = 0; i < 32; ++i) {
              prg_map[i] = (1024 * i) & (prgsize - 1);
          }
          for (int i = 0; i < 8; ++i) {
              chr_map[i] = (1024 * i) & (chrsize - 1);
          }
      }
  
      @Override
      public final void cartWrite(final int addr, final int data) {
          if (addr < 0x8000 || addr > 0xffff) {
              super.cartWrite(addr, data);
              return;
          }
  
          setmirroring(
                  ((addr & (0xD)) != 0) ? MirrorType.H_MIRROR : MirrorType.V_MIRROR);
  
          int bank = addr >> 7 & 0x1F;
  
          if ((addr & 0x1000) != 0) {
              bank = (bank << 1) | (addr >> 6 & 1);
              for (int i = 0; i < 16; ++i) {
                  prg_map[i] = (1024 * (i + 16 * bank)) & (prgsize - 1);
              }
              for (int i = 0; i < 16; ++i) {
                  prg_map[i + 16] = (1024 * (i + 16 * bank)) & (prgsize - 1);
              }
          } else {
              for (int i = 0; i < 32; ++i) {
                  prg_map[i] = (1024 * (i + 32 * bank)) & (prgsize - 1);
              }
          }
          //remap CHR bank
          for (int i = 0; i < 8; ++i) {
              chr_map[i] = (1024 * (i + 8 * addr)) & (chrsize - 1);
          }
      }
  }
  