| 1 | /* FCE Ultra - NES/Famicom Emulator |
| 2 | * |
| 3 | * Copyright notice for this file: |
| 4 | * Copyright (C) 2003 Xodnizel |
| 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 | static uint8 LastWr; |
| 24 | static uint8 ExtMode; |
| 25 | static uint8 cmd; |
| 26 | static uint8 DRegs[8]; |
| 27 | static uint32 count=0; |
| 28 | static uint32 last=0; |
| 29 | static int safe=0; |
| 30 | static uint8 poofish; |
| 31 | |
| 32 | static void Sync(void) |
| 33 | { |
| 34 | int x; |
| 35 | uint32 base=0; |
| 36 | |
| 37 | if(cmd&0x80) base=0x1000; |
| 38 | setchr2(0x0000^base,(0x100|DRegs[0])>>1); |
| 39 | setchr2(0x0800^base,(0x100|DRegs[1])>>1); |
| 40 | for(x=0;x<4;x++) |
| 41 | setchr1((0x1000^base)+x*0x400,DRegs[2+x]); |
| 42 | |
| 43 | if(ExtMode&0x80) |
| 44 | { |
| 45 | if(ExtMode&0x20) |
| 46 | setprg32(0x8000,(ExtMode&0x1F)>>1); |
| 47 | else |
| 48 | { |
| 49 | setprg16(0x8000,(ExtMode&0x1F)); |
| 50 | setprg16(0xc000,(ExtMode&0x1F)); |
| 51 | } |
| 52 | } |
| 53 | else |
| 54 | { |
| 55 | setprg8(0x8000,DRegs[6]); |
| 56 | setprg8(0xa000,DRegs[7]); |
| 57 | setprg8(0xc000,~1); |
| 58 | setprg8(0xe000,~0); |
| 59 | } |
| 60 | } |
| 61 | |
| 62 | static DECLFW(M187Write) |
| 63 | { |
| 64 | // FCEU_printf("Write: %04x:%04x (%04x,%d)\n",A,V,X.PC,scanline); |
| 65 | LastWr=V; |
| 66 | if(A==0x5000) |
| 67 | ExtMode=V; |
| 68 | Sync(); |
| 69 | } |
| 70 | |
| 71 | static DECLFW(M187HWrite) |
| 72 | { |
| 73 | // FCEU_printf("Write: %04x:%04x (%04x,%d)\n",A,V,X.PC,scanline); |
| 74 | //if(A==0x8003 && X.PC<0x800) FCEUI_DumpMem("dmp",0x0000,0xFFFF); |
| 75 | //printf("$%04x:$%02x, %04x\n",A,V,X.PC); |
| 76 | LastWr=V; |
| 77 | |
| 78 | if(A==0x8003) |
| 79 | { |
| 80 | // if(V==0x28 || V==0x2A) |
| 81 | poofish=V; |
| 82 | } |
| 83 | else if(A==0x8000) poofish=0; |
| 84 | |
| 85 | switch(A) |
| 86 | { |
| 87 | case 0xc000:IRQLatch=IRQCount=V;break; |
| 88 | case 0xc001:IRQCount=IRQLatch;last=count=0;break; |
| 89 | case 0xe000:IRQa=0;X6502_IRQEnd(FCEU_IQEXT);break; |
| 90 | case 0xe001:IRQa=1;break; |
| 91 | case 0xa000:MIRROR_SET(V&1);break; |
| 92 | |
| 93 | case 0x8000:cmd=V;safe=1;break; |
| 94 | case 0x8001: |
| 95 | if(safe) |
| 96 | { |
| 97 | //printf("Cmd: %d, %02x, %04x\n",cmd&0x7,V,X.PC); |
| 98 | DRegs[cmd&7]=V; |
| 99 | Sync(); |
| 100 | safe=0; |
| 101 | } |
| 102 | if(poofish==0x28) |
| 103 | setprg8(0xC000,0x17); |
| 104 | else if(poofish==0x2A) |
| 105 | setprg8(0xA000,0x0F); |
| 106 | break; |
| 107 | |
| 108 | } |
| 109 | } |
| 110 | |
| 111 | static DECLFR(ProtRead) |
| 112 | { |
| 113 | switch(LastWr&0x3) |
| 114 | { |
| 115 | case 0x1: |
| 116 | case 0x0: return(0x83); |
| 117 | case 0x2: return(0x42); |
| 118 | } |
| 119 | return(0); |
| 120 | } |
| 121 | |
| 122 | DECLFW(Write_IRQFM); |
| 123 | |
| 124 | static void M187Power(void) |
| 125 | { |
| 126 | Write_IRQFM(0x4017,0x40); |
| 127 | SetWriteHandler(0x5000,0x5fff,M187Write); |
| 128 | SetWriteHandler(0x8000,0xFFFF,M187HWrite); |
| 129 | SetReadHandler(0x5000,0x5FFF,ProtRead); |
| 130 | SetWriteHandler(0x6000,0x7FFF,M187Write); |
| 131 | SetReadHandler(0x8000,0xffff,CartBR); |
| 132 | Sync(); |
| 133 | } |
| 134 | |
| 135 | static void sl(void) |
| 136 | { |
| 137 | if(IRQa) |
| 138 | { |
| 139 | if(IRQCount>=0) |
| 140 | { |
| 141 | IRQCount--; |
| 142 | if(IRQCount<0) |
| 143 | { |
| 144 | X6502_IRQBegin(FCEU_IQEXT); |
| 145 | } |
| 146 | } |
| 147 | } |
| 148 | } |
| 149 | |
| 150 | static void FP_FASTAPASS(1) foo(uint32 A) |
| 151 | { |
| 152 | if((A&0x2000) && !(last&0x2000)) |
| 153 | { |
| 154 | count++; |
| 155 | if(count==42) |
| 156 | { |
| 157 | sl(); |
| 158 | count=0; |
| 159 | } |
| 160 | } |
| 161 | last=A; |
| 162 | } |
| 163 | |
| 164 | void Mapper187_Init(CartInfo *info) |
| 165 | { |
| 166 | info->Power=M187Power; |
| 167 | // GameHBIRQHook=sl; |
| 168 | PPU_hook=foo; |
| 169 | } |
| 170 | |