| 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 void M187CW(uint32 A, uint8 V) |
| 25 | { |
| 26 | if((A&0x1000)==((MMC3_cmd&0x80)<<5)) |
| 27 | setchr1(A,V|0x100); |
| 28 | else |
| 29 | setchr1(A,V); |
| 30 | } |
| 31 | |
| 32 | static void M187PW(uint32 A, uint8 V) |
| 33 | { |
| 34 | if(EXPREGS[0]&0x80) |
| 35 | { |
| 36 | uint8 bank=EXPREGS[0]&0x1F; |
| 37 | if(EXPREGS[0]&0x20) |
| 38 | setprg32(0x8000,bank>>2); |
| 39 | else |
| 40 | { |
| 41 | setprg16(0x8000,bank); |
| 42 | setprg16(0xC000,bank); |
| 43 | } |
| 44 | } |
| 45 | else |
| 46 | setprg8(A,V&0x3F); |
| 47 | } |
| 48 | |
| 49 | static DECLFW(M187Write8000) |
| 50 | { |
| 51 | EXPREGS[2]=1; |
| 52 | MMC3_CMDWrite(A,V); |
| 53 | } |
| 54 | |
| 55 | static DECLFW(M187Write8001) |
| 56 | { |
| 57 | if(EXPREGS[2]) |
| 58 | MMC3_CMDWrite(A,V); |
| 59 | } |
| 60 | |
| 61 | static DECLFW(M187Write8003) |
| 62 | { |
| 63 | EXPREGS[2]=0; |
| 64 | if(V==0x28)setprg8(0xC000,0x17); |
| 65 | else if(V==0x2A)setprg8(0xA000,0x0F); |
| 66 | } |
| 67 | |
| 68 | |
| 69 | static DECLFW(M187WriteLo) |
| 70 | { |
| 71 | EXPREGS[1]=V; |
| 72 | if(A==0x5000) |
| 73 | { |
| 74 | EXPREGS[0]=V; |
| 75 | FixMMC3PRG(MMC3_cmd); |
| 76 | } |
| 77 | } |
| 78 | |
| 79 | static uint8 prot_data[4] = { 0x83, 0x83, 0x42, 0x00 }; |
| 80 | static DECLFR(M187Read) |
| 81 | { |
| 82 | return prot_data[EXPREGS[1]&3]; |
| 83 | } |
| 84 | |
| 85 | static void M187Power(void) |
| 86 | { |
| 87 | EXPREGS[0]=EXPREGS[1]=EXPREGS[2]=0; |
| 88 | GenMMC3Power(); |
| 39e1ccff |
89 | Write_IRQFM(0x4017,0x40); |
| e2d0dd92 |
90 | SetReadHandler(0x5000,0x5FFF,M187Read); |
| 91 | SetWriteHandler(0x5000,0x5FFF,M187WriteLo); |
| 92 | SetWriteHandler(0x8000,0x8000,M187Write8000); |
| 93 | SetWriteHandler(0x8001,0x8001,M187Write8001); |
| 94 | SetWriteHandler(0x8003,0x8003,M187Write8003); |
| 95 | } |
| 96 | |
| 97 | void Mapper187_Init(CartInfo *info) |
| 98 | { |
| 99 | GenMMC3_Init(info, 256, 256, 0, 0); |
| 100 | pwrap=M187PW; |
| 101 | cwrap=M187CW; |
| 102 | info->Power=M187Power; |
| 103 | AddExState(EXPREGS, 3, 0, "EXPR"); |
| 104 | } |
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