1 /* FCE Ultra - NES/Famicom Emulator
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3 * Copyright notice for this file:
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4 * Copyright (C) 2006 CaH4e3
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6 * This program is free software; you can redistribute it and/or modify
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7 * it under the terms of the GNU General Public License as published by
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8 * the Free Software Foundation; either version 2 of the License, or
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9 * (at your option) any later version.
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11 * This program is distributed in the hope that it will be useful,
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 * GNU General Public License for more details.
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16 * You should have received a copy of the GNU General Public License
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17 * along with this program; if not, write to the Free Software
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18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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23 static uint8 chr_reg[4];
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24 static uint8 kogame, prg_reg, nt1, nt2, mirr;
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26 static uint8 *WRAM=NULL;
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27 static uint32 WRAMSIZE, count;
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29 static SFORMAT StateRegs[]=
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34 {&prg_reg, 1, "PRG"},
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35 {&kogame, 1, "KGME"},
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37 {chr_reg, 4, "CHR"},
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41 static void M68NTfix(void)
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43 if((!UNIFchrrama)&&(mirr&0x10))
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48 case 0: vnapage[0]=vnapage[2]=CHRptr[0]+(((nt1|128)&CHRmask1[0])<<10);
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49 vnapage[1]=vnapage[3]=CHRptr[0]+(((nt2|128)&CHRmask1[0])<<10);
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51 case 1: vnapage[0]=vnapage[1]=CHRptr[0]+(((nt1|128)&CHRmask1[0])<<10);
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52 vnapage[2]=vnapage[3]=CHRptr[0]+(((nt2|128)&CHRmask1[0])<<10);
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54 case 2: vnapage[0]=vnapage[1]=vnapage[2]=vnapage[3]=CHRptr[0]+(((nt1|128)&CHRmask1[0])<<10);
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56 case 3: vnapage[0]=vnapage[1]=vnapage[2]=vnapage[3]=CHRptr[0]+(((nt2|128)&CHRmask1[0])<<10);
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63 case 0: setmirror(MI_V); break;
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64 case 1: setmirror(MI_H); break;
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65 case 2: setmirror(MI_0); break;
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66 case 3: setmirror(MI_1); break;
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70 static void Sync(void)
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72 setchr2(0x0000,chr_reg[0]);
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73 setchr2(0x0800,chr_reg[1]);
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74 setchr2(0x1000,chr_reg[2]);
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75 setchr2(0x1800,chr_reg[3]);
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76 setprg8r(0x10,0x6000,0);
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77 setprg16r((PRGptr[1])?kogame:0,0x8000,prg_reg);
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78 setprg16(0xC000,~0);
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81 static DECLFR(M68Read)
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87 setprg16r(0,0x8000,prg_reg);
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92 static DECLFW(M68WriteLo)
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97 setprg16r((PRGptr[1])?kogame:0,0x8000,prg_reg);
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102 static DECLFW(M68WriteCHR)
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104 chr_reg[(A>>12)&3]=V;
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108 static DECLFW(M68WriteNT1)
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114 static DECLFW(M68WriteNT2)
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120 static DECLFW(M68WriteMIR)
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126 static DECLFW(M68WriteROM)
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129 kogame = ((V>>3)&1)^1;
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133 static void M68Power(void)
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139 SetReadHandler(0x6000,0x7FFF,CartBR);
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140 SetReadHandler(0x8000,0xBFFF,M68Read);
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141 SetReadHandler(0xC000,0xFFFF,CartBR);
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142 SetWriteHandler(0x8000,0xBFFF,M68WriteCHR);
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143 SetWriteHandler(0xC000,0xCFFF,M68WriteNT1);
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144 SetWriteHandler(0xD000,0xDFFF,M68WriteNT2);
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145 SetWriteHandler(0xE000,0xEFFF,M68WriteMIR);
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146 SetWriteHandler(0xF000,0xFFFF,M68WriteROM);
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147 SetWriteHandler(0x6000,0x6000,M68WriteLo);
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148 SetWriteHandler(0x6001,0x7FFF,CartBW);
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151 static void M68Close(void)
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158 static void StateRestore(int version)
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164 void Mapper68_Init(CartInfo *info)
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166 info->Power=M68Power;
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167 info->Close=M68Close;
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168 GameStateRestore=StateRestore;
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170 WRAM=(uint8*)FCEU_gmalloc(WRAMSIZE);
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171 SetupCartPRGMapping(0x10,WRAM,WRAMSIZE,1);
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174 info->SaveGame[0]=WRAM;
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175 info->SaveGameLen[0]=WRAMSIZE;
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177 AddExState(WRAM, WRAMSIZE, 0, "WRAM");
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178 AddExState(&StateRegs, ~0, 0, 0);
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