| e2d0dd92 |
1 | /* FCE Ultra - NES/Famicom Emulator |
| 2 | * |
| 3 | * Copyright notice for this file: |
| 4 | * Copyright (C) 2005 CaH4e3 |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | */ |
| 20 | |
| 21 | #include "mapinc.h" |
| 22 | #include "mmc3.h" |
| 23 | |
| 24 | static uint8 unromchr; |
| 25 | |
| 26 | static void BMCFK23CCW(uint32 A, uint8 V) |
| 27 | { |
| 28 | if(EXPREGS[0]&0x40) |
| 29 | setchr8((EXPREGS[2]&0xFC)|unromchr); |
| 30 | else |
| 31 | { |
| 32 | uint16 base=(EXPREGS[2]&0x7F)<<3; |
| 33 | setchr1(A,V|base); |
| 34 | if(EXPREGS[3]&2) |
| 35 | { |
| 36 | setchr1(0x0400,EXPREGS[6]|base); |
| 37 | setchr1(0x0C00,EXPREGS[7]|base); |
| 38 | } |
| 39 | } |
| 40 | } |
| 41 | |
| 42 | static void BMCFK23CPW(uint32 A, uint8 V) |
| 43 | { |
| 44 | if(EXPREGS[0]&4) |
| 45 | setprg32(0x8000,EXPREGS[1]>>1); |
| 46 | else |
| 47 | { |
| 48 | if(EXPREGS[0]&2) |
| 49 | setprg8(A,(V&(0x3F>>(EXPREGS[0]&3)))|(EXPREGS[1]<<1)); |
| 50 | else |
| 51 | setprg8(A,V); |
| 52 | if(EXPREGS[3]&2) |
| 53 | { |
| 54 | setprg8(0xC000,EXPREGS[4]); |
| 55 | setprg8(0xE000,EXPREGS[5]); |
| 56 | } |
| 57 | } |
| 58 | } |
| 59 | |
| 60 | static DECLFW(BMCFK23C8003Write) |
| 61 | { |
| 62 | if(EXPREGS[0]&0x40) |
| 63 | { |
| 64 | unromchr=V&3; |
| 65 | FixMMC3CHR(MMC3_cmd); |
| 66 | } |
| 67 | else |
| 68 | { |
| 69 | if((A==0x8001)&&(EXPREGS[3]&2&&MMC3_cmd&8)) |
| 70 | { |
| 71 | EXPREGS[4|(MMC3_cmd&3)]=V; |
| 72 | FixMMC3PRG(MMC3_cmd); |
| 73 | FixMMC3CHR(MMC3_cmd); |
| 74 | } |
| 75 | else |
| 76 | MMC3_CMDWrite(A,V); |
| 77 | } |
| 78 | } |
| 79 | |
| 80 | static DECLFW(BMCFK23CWrite) |
| 81 | { |
| 82 | EXPREGS[A&3]=V; |
| 83 | FixMMC3PRG(MMC3_cmd); |
| 84 | FixMMC3CHR(MMC3_cmd); |
| 85 | } |
| 86 | |
| 87 | static void BMCFK23CReset(void) |
| 88 | { |
| 89 | EXPREGS[0]=EXPREGS[1]=EXPREGS[2]=EXPREGS[3]=0; |
| 90 | EXPREGS[4]=EXPREGS[5]=EXPREGS[6]=EXPREGS[7]=0xFF; |
| 91 | MMC3RegReset(); |
| 92 | } |
| 93 | |
| 94 | static void BMCFK23CPower(void) |
| 95 | { |
| 96 | EXPREGS[0]=EXPREGS[1]=EXPREGS[2]=EXPREGS[3]=0; |
| 97 | EXPREGS[4]=EXPREGS[5]=EXPREGS[6]=EXPREGS[7]=0xFF; |
| 98 | GenMMC3Power(); |
| 99 | SetWriteHandler(0x5ff0,0x5fff,BMCFK23CWrite); |
| 100 | SetWriteHandler(0x8000,0x8003,BMCFK23C8003Write); |
| 101 | } |
| 102 | |
| 103 | void BMCFK23C_Init(CartInfo *info) |
| 104 | { |
| 105 | GenMMC3_Init(info, 512, 256, 8, 0); |
| 106 | cwrap=BMCFK23CCW; |
| 107 | pwrap=BMCFK23CPW; |
| 108 | info->Power=BMCFK23CPower; |
| 109 | info->Reset=BMCFK23CReset; |
| 110 | AddExState(EXPREGS, 8, 0, "EXPR"); |
| 111 | AddExState(&unromchr, 1, 0, "UNCHR"); |
| 112 | } |
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