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);
  18                        X6502_Rebase();break;
  19                 case 5:ROM_BANK8(0xA000,V);
  20                        X6502_Rebase();break;
  21                 case 6:VROM_BANK1(0x1000,V);break;
  22                 case 7:VROM_BANK1(0x1800,V);break;
  23                }
  24                break;
  25
  26
  27   }
  28 }
  29
  30 void blop(void)
  31 {
  32  if(IRQa)
  33   {
  34    if(IRQCount)
  35    {
  36     IRQCount--;
  37     if(!IRQCount)
  38     {
  39      IRQa=0;
  40      TriggerIRQ();
  41     }
  42    }
  43   }
  44 }
  45 void Mapper182_init(void)
  46 {
  47  SetWriteHandler(0x8000,0xFFFF,Mapper182_write);
  48  GameHBIRQHook=blop;
  49 }
  50