| 1 | /* FCE Ultra - NES/Famicom Emulator |
| 2 | * |
| 3 | * Copyright notice for this file: |
| 4 | * Copyright (C) 2002 Ben Parnell |
| 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 | |
| 23 | #define vrctemp mapbyte1[0] |
| 24 | #define indox mapbyte1[1] |
| 25 | |
| 26 | static int acount=0; |
| 27 | |
| 28 | void KillOPL(void); |
| 29 | void UpdateOPL(int Count); |
| 30 | void vrc7translate(uint8 A, uint8 V); |
| 31 | void LoadOPL(void); |
| 32 | extern uint8 VRC7Instrument[16][8]; |
| 33 | extern uint8 VRC7Chan[3][6]; |
| 34 | |
| 35 | static INLINE void DaMirror(int V) |
| 36 | { |
| 37 | int salpo[4]={MI_V,MI_H,MI_0,MI_1}; |
| 38 | setmirror(salpo[V&3]); |
| 39 | } |
| 40 | |
| 41 | DECLFW(Mapper85_write) |
| 42 | { |
| 43 | A|=(A&8)<<1; |
| 44 | |
| 45 | if(A>=0xa000 && A<=0xDFFF) |
| 46 | { |
| 47 | A&=0xF010; |
| 48 | { |
| 49 | int x=((A>>4)&1)|((A-0xA000)>>11); |
| 50 | mapbyte3[x]=V; |
| 51 | setchr1(x<<10,V); |
| 52 | } |
| 53 | } |
| 54 | else if(A==0x9030) |
| 55 | { |
| 56 | if(FSettings.SndRate) |
| 57 | vrc7translate(indox,V); |
| 58 | GameExpSound.Fill=UpdateOPL; |
| 59 | } |
| 60 | else switch(A&0xF010) |
| 61 | { |
| 62 | case 0x8000:mapbyte2[0]=V;setprg8(0x8000,V);break; |
| 63 | case 0x8010:mapbyte2[1]=V;setprg8(0xa000,V);break; |
| 64 | case 0x9000:mapbyte2[2]=V;setprg8(0xc000,V);break; |
| 65 | case 0x9010:indox=V;break; |
| 66 | case 0xe000:mapbyte2[3]=V;DaMirror(V);break; |
| 67 | case 0xE010:IRQLatch=V; |
| 68 | break; |
| 69 | case 0xF000:IRQa=V&2; |
| 70 | vrctemp=V&1; |
| 71 | if(V&2) {IRQCount=IRQLatch;acount=0;} |
| 72 | break; |
| 73 | case 0xf010:if(vrctemp) IRQa=1; |
| 74 | else IRQa=0; |
| 75 | break; |
| 76 | } |
| 77 | } |
| 78 | |
| 79 | static void FP_FASTAPASS(1) KonamiIRQHook(int a) |
| 80 | { |
| 81 | if(IRQa) |
| 82 | { |
| 83 | acount+=(a<<1)+a; |
| 84 | if(acount>=339) |
| 85 | { |
| 86 | doagainbub:acount-=339;IRQCount++; |
| 87 | if(IRQCount&0x100) {TriggerIRQ();IRQCount=IRQLatch;} |
| 88 | if(acount>=339) goto doagainbub; |
| 89 | } |
| 90 | } |
| 91 | } |
| 92 | |
| 93 | void Mapper85_StateRestore(int version) |
| 94 | { |
| 95 | int x; |
| 96 | |
| 97 | if(version<72) |
| 98 | { |
| 99 | for(x=0;x<8;x++) |
| 100 | mapbyte3[x]=CHRBankList[x]; |
| 101 | for(x=0;x<3;x++) |
| 102 | mapbyte2[x]=PRGBankList[x]; |
| 103 | mapbyte2[3]=(Mirroring<0x10)?Mirroring:Mirroring-0xE; |
| 104 | } |
| 105 | |
| 106 | for(x=0;x<8;x++) |
| 107 | setchr1(x*0x400,mapbyte3[x]); |
| 108 | for(x=0;x<3;x++) |
| 109 | setprg8(0x8000+x*8192,mapbyte2[x]); |
| 110 | DaMirror(mapbyte2[3]); |
| 111 | LoadOPL(); |
| 112 | } |
| 113 | |
| 114 | static void M85SC(void) |
| 115 | { |
| 116 | KillOPL(); |
| 117 | } |
| 118 | |
| 119 | void VRC7_ESI(void) |
| 120 | { |
| 121 | if(FSettings.SndRate) |
| 122 | { |
| 123 | SetWriteHandler(0x9010,0x901F,Mapper85_write); |
| 124 | SetWriteHandler(0x9030,0x903F,Mapper85_write); |
| 125 | } |
| 126 | GameExpSound.RChange=M85SC; |
| 127 | } |
| 128 | |
| 129 | void Mapper85_init(void) |
| 130 | { |
| 131 | MapIRQHook=KonamiIRQHook; |
| 132 | SetWriteHandler(0x8000,0xffff,Mapper85_write); |
| 133 | GameStateRestore=Mapper85_StateRestore; |
| 134 | VRC7_ESI(); |
| 135 | if(!VROM_size) |
| 136 | SetupCartCHRMapping(0, CHRRAM, 8192, 1); |
| 137 | AddExState(VRC7Instrument, 16, 0, "VC7I"); |
| 138 | AddExState(VRC7Chan, sizeof(VRC7Chan), 0, "V7CH"); |
| 139 | |
| 140 | } |