140 lines
3.5 KiB
C++
140 lines
3.5 KiB
C++
/* FCE Ultra - NES/Famicom Emulator
|
|
*
|
|
* Copyright notice for this file:
|
|
* Copyright (C) 2002 CaH4e3
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#include "mapinc.h"
|
|
|
|
static uint8 prg_reg;
|
|
static uint8 chr_reg;
|
|
|
|
static uint8 sim0reg, sim0bit, sim0byte, sim0parity, sim0bcnt;
|
|
static uint16 sim0data;
|
|
static uint8 sim0array[128] =
|
|
{
|
|
0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10,
|
|
0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10,
|
|
0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10,
|
|
0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10,
|
|
0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10,
|
|
0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10,
|
|
0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10,
|
|
0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0xAA,
|
|
};
|
|
|
|
static SFORMAT StateRegs[]=
|
|
{
|
|
{&prg_reg, 1, "PREG"},
|
|
{&chr_reg, 1, "CREG"},
|
|
{0}
|
|
};
|
|
|
|
static void Sync(void)
|
|
{
|
|
setprg32(0x8000, prg_reg);
|
|
setchr8(chr_reg);
|
|
}
|
|
|
|
static void StateRestore(int version)
|
|
{
|
|
Sync();
|
|
}
|
|
|
|
static DECLFW(M216WriteHi)
|
|
{
|
|
// FCEU_printf("%04x:%04x\n",A,V);
|
|
prg_reg=A&1;
|
|
chr_reg=(A&0x0E)>>1;
|
|
Sync();
|
|
}
|
|
|
|
static DECLFW(M216Write5000)
|
|
{
|
|
// FCEU_printf("WRITE: %04x:%04x\n",A,V);
|
|
sim0reg=V;
|
|
if(!sim0reg)
|
|
{
|
|
sim0bit=sim0byte=sim0parity=0;
|
|
sim0data=sim0array[0];
|
|
sim0bcnt=0x80;
|
|
}
|
|
else if(sim0reg&0x20)
|
|
{
|
|
sim0bcnt=0x20;
|
|
}
|
|
}
|
|
|
|
static DECLFR(M216Read5000)
|
|
{
|
|
if(sim0reg&0x60)
|
|
{
|
|
sim0reg=(sim0reg^(sim0reg<<1))&0x40;
|
|
return sim0reg;
|
|
}
|
|
else
|
|
{
|
|
uint8 sim0out=0;
|
|
if(sim0bit<8)
|
|
{
|
|
// sim0data=((sim0array[sim0byte]<<(sim0bit))&0x80)>>1;
|
|
sim0out=(sim0data&1)<<6;
|
|
sim0data>>=1;
|
|
sim0bit++;
|
|
sim0parity+=sim0data;
|
|
}
|
|
else if(sim0bit==8)
|
|
{
|
|
sim0bit++;
|
|
sim0out=sim0parity&1;
|
|
}
|
|
else if(sim0bit==9)
|
|
{
|
|
if(sim0byte==sim0bcnt)
|
|
sim0out=0x60;
|
|
else
|
|
{
|
|
sim0bit=0;
|
|
sim0byte++;
|
|
sim0data=sim0array[sim0byte];
|
|
sim0out=0;
|
|
}
|
|
}
|
|
// FCEU_printf("READ: %04x (%04x-%02x,%04x)\n",A,X.PC,sim0out,sim0byte);
|
|
return sim0out;
|
|
}
|
|
}
|
|
|
|
static void Power(void)
|
|
{
|
|
prg_reg = 0;
|
|
chr_reg = 0;
|
|
Sync();
|
|
SetReadHandler(0x8000,0xFFFF,CartBR);
|
|
SetWriteHandler(0x8000,0xFFFF,M216WriteHi);
|
|
SetWriteHandler(0x5000,0x5000,M216Write5000);
|
|
SetReadHandler(0x5000,0x5000,M216Read5000);
|
|
}
|
|
|
|
|
|
void Mapper216_Init(CartInfo *info)
|
|
{
|
|
info->Power=Power;
|
|
GameStateRestore=StateRestore;
|
|
AddExState(&StateRegs, ~0, 0, 0);
|
|
}
|