content: package com.grapeshot.halfnes.mappers;
  
  import com.grapeshot.halfnes.*;
  
  public class Mapper226 extends Mapper {
  
      int[] reg = {0, 0};
  
      @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;
          }
  
          reg[addr & 1] = data;
  
          int bank = ((reg[0] >> 1 & 0x0F) | (reg[0] >> 3 & 0x10) | (reg[1] << 5 & 0x20));
  
          setmirroring(((reg[0] & (utils.BIT6)) != 0) ? MirrorType.V_MIRROR : MirrorType.H_MIRROR);
  
          if ((reg[0] & 0x20) != 0) {
              bank = (bank << 1) | (reg[0] & 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);
              }
          }
      }
  }
  