fceux/mappers/217.cpp

96 lines
1.6 KiB
C++

/*
#include "mapinc.h"
static uint8 cmdin;
static uint8 cmd;
static uint8 regs[8];
static uint8 master,chrm;
static void DoPRG217(void)
{
if(master&0x80)
{
setprg16(0x8000,master&0x1F);
setprg16(0xc000,master&0x1F);
}
else
{
setprg8(0x8000,regs[1]);
setprg8(0xA000,regs[3]);
setprg8(0xC000,~1);
setprg8(0xE000,~0);
}
}
static void DoCHR217(void)
{
uint32 base=(cmd&0x80)<<5;
int orie=(chrm&0x4)<<6;
setchr2(0x0000^base,(orie|regs[0])>>1);
setchr2(0x0800^base,(orie|regs[7])>>1);
setchr1(0x1000,orie|regs[5]);
setchr1(0x1400,orie|regs[2]);
setchr1(0x1800,orie|regs[6]);
setchr1(0x1c00,orie|regs[4]);
}
static DECLFW(Write217_write)
{
// if(A==0x5000)
// {
// master=V;
// DoPRG217();
// }
// else if(A==0x5001)
// {
// chrm=V;
// DoCHR217();
// }
// else if(A==0x5007)
// {
// }
switch(A&0xE001)
{
case 0x4000:master=V;DoPRG217();break;
case 0x8000:IRQCount=V;break;
case 0xc001:break;
case 0xe000:X6502_IRQEnd(FCEU_IQEXT);break;
case 0xe001:break;
case 0xa001:setmirror((V&1)^1);break;
case 0x8001:cmd=V;cmdin=1;DoPRG217();DoCHR217();break;
case 0xa000:if(!cmdin) break;
regs[cmd&7]=V;
DoPRG217();
DoCHR217();
cmdin=0;
break;
}
}
static void hooko217(void)
{
if(IRQCount)
{
IRQCount--;
if(!IRQCount)
{
X6502_IRQBegin(FCEU_IQEXT);
}
}
}
void Mapper217_init(void)
{
int x;
for(x=0;x<8;x++) regs[x]=0;
master=chrm=cmd=cmdin=IRQCount=0;
GameHBIRQHook=hooko217;
SetReadHandler(0x8000,0xFFFF,CartBR);
SetWriteHandler(0x5000,0xFFFF,Write217_write);
DoPRG217();
DoCHR217();
}
*/