mappers/182.c

   1 #include "mapinc.h"
   2
   3 DECLFW(Mapper182_write)
   4 {
   5   switch(A&0xf003)
   6   {
   7    case 0xe003:IRQCount=V;IRQa=1;break;
   8    case 0x8001:MIRROR_SET(V&1);break;
   9    case 0xA000:mapbyte1[0]=V;break;
  10    case 0xC000:
  11                switch(mapbyte1[0]&7)
  12                {
  13                 case 0:VROM_BANK2(0x0000,V>>1);break;
  14                 case 1:VROM_BANK1(0x1400,V);break;
  15                 case 2:VROM_BANK2(0x0800,V>>1);break;
  16                 case 3:VROM_BANK1(0x1c00,V);break;
  17                 case 4:ROM_BANK8(0x8000,V);break;
  18                 case 5:ROM_BANK8(0xA000,V);break;
  19                 case 6:VROM_BANK1(0x1000,V);break;
  20                 case 7:VROM_BANK1(0x1800,V);break;
  21                }
  22                break;
  23
  24
  25   }
  26 }
  27
  28 void blop(void)
  29 {
  30  if(IRQa)
  31   {
  32    if(IRQCount)
  33    {
  34     IRQCount--;
  35     if(!IRQCount)
  36     {
  37      IRQa=0;
  38      TriggerIRQ();
  39     }
  40    }
  41   }
  42 }
  43 void Mapper182_init(void)
  44 {
  45  SetWriteHandler(0x8000,0xFFFF,Mapper182_write);
  46  GameHBIRQHook=blop;
  47 }
  48