#define cmd mapbyte1[0]
static DECLFW(Mapper189_write)
{
- if(A==0x4120)
- {
- ROM_BANK32(V>>4);
- X6502_Rebase();
- }
+ //if(A>=0xc000) printf("$%04x:$%02x\n",A,V);
+ if((A&0xF100)==0x4100) ROM_BANK32(V>>4);
+ else if((A&0xF100)==0x6100) ROM_BANK32(V&3);
else switch(A&0xE001)
{
case 0xa000:MIRROR_SET(V&1);break;
case 0x8000:cmd=V;break;
case 0x8001:switch(cmd&7)
- {
- case 0:VROM_BANK2(0x0000,V>>1);break;
- case 1:VROM_BANK2(0x0800,V>>1);break;
- case 2:VROM_BANK1(0x1000,V);break;
+ {
+ case 0:VROM_BANK2(0x0000,V>>1);break;
+ case 1:VROM_BANK2(0x0800,V>>1);break;
+ case 2:VROM_BANK1(0x1000,V);break;
case 3:VROM_BANK1(0x1400,V);break;
case 4:VROM_BANK1(0x1800,V);break;
case 5:VROM_BANK1(0x1C00,V);break;
- }
- break;
+ }
+ case 0xc000:IRQLatch=V;break;
+ case 0xc001:IRQCount=IRQLatch;break;
+ case 0xe000:IRQa=0;X6502_IRQEnd(FCEU_IQEXT);break;
+ case 0xe001:IRQa=1;break;
+ break;
}
}
+void m189irq(void)
+{
+ if(IRQa)
+ {
+ if(IRQCount)
+ {
+ IRQCount--;
+ if(!IRQCount) X6502_IRQBegin(FCEU_IQEXT);
+ }
+ }
+}
void Mapper189_init(void)
{
+ GameHBIRQHook=m189irq;
SetWriteHandler(0x4120,0xFFFF,Mapper189_write);
SetReadHandler(0x6000,0x7FFF,0);
ROM_BANK32(0);