content: package com.grapeshot.halfnes.mappers;
  
  import com.grapeshot.halfnes.*;
  
  public class Sunsoft02Mapper extends Mapper {
  
      boolean m93;
  
      public Sunsoft02Mapper(int mappernum) {
          super();
          m93 = (mappernum == 93);
      }
  
      @Override
      public void loadrom() throws BadMapperException {
          //needs to be in every mapper. Fill with initial cfg
          super.loadrom();
          //swappable bank
          for (int i = 0; i < 16; ++i) {
              prg_map[i] = (1024 * i) & (prgsize - 1);
          }
          //fixed bank
          for (int i = 1; i <= 16; ++i) {
              prg_map[32 - i] = prgsize - (1024 * i);
          }
          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) {
          int prgselect;
  
          if (addr < 0x8000 || addr > 0xffff) {
              super.cartWrite(addr, data);
              return;
          }
          if (m93) {
              prgselect = (data >> 4) & 15;
          } else {
              prgselect = (data >> 4) & 7;
              setmirroring(((data & (utils.BIT3)) != 0) ? MirrorType.SS_MIRROR1 : MirrorType.SS_MIRROR0);
  
              int chrselect = ((data & 7) | (data >> 7) * 8);
  
              //remap CHR bank
              for (int i = 0; i < 8; ++i) {
                  chr_map[i] = (1024 * (i + 8 * chrselect)) & (chrsize - 1);
              }
          }
  
          //remap PRG bank
          for (int i = 0; i < 16; ++i) {
              prg_map[i] = (1024 * (i + 16 * prgselect)) & (prgsize - 1);
          }
      }
  }
  