| 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 | |
| 23 | static uint8 chrcmd[8], prg0, prg1, brk, mirr; |
| 24 | static uint8 reg[8], cmd; |
| 25 | static uint8 IRQCount,IRQLatch,IRQa; |
| 26 | static uint8 IRQReload; |
| 27 | static SFORMAT StateRegs[]= |
| 28 | { |
| 29 | {reg, 8, "MMCREG"}, |
| 30 | {&cmd, 1, "MMCCMD"}, |
| 31 | {chrcmd, 8, "CHRCMD"}, |
| 32 | {&prg0, 1, "PRG0"}, |
| 33 | {&prg1, 1, "PRG1"}, |
| 34 | {&brk, 1, "BRK"}, |
| 35 | {&mirr, 1, "MIRR"}, |
| 36 | {&IRQReload, 1, "IRQR"}, |
| 37 | {&IRQCount, 1, "IRQC"}, |
| 38 | {&IRQLatch, 1, "IRQL"}, |
| 39 | {&IRQa, 1, "IRQA"}, |
| 40 | {0} |
| 41 | }; |
| 42 | |
| 43 | static void Sync(void) |
| 44 | { |
| 45 | // if(brk&2) |
| 46 | // { |
| 47 | // setprg16(0x8000,~0); |
| 48 | // setprg16(0xC000,~0); |
| 49 | // } |
| 50 | // else |
| 51 | { |
| 52 | setprg8(0x8000,prg0); |
| 53 | setprg8(0xA000,prg1); |
| 54 | } |
| 55 | int i; |
| 56 | for(i=0; i<8; i++) |
| 57 | setchr1(i<<10,chrcmd[i]); |
| 58 | setmirror(mirr^1); |
| 59 | } |
| 60 | |
| 61 | static void Sync2(void) |
| 62 | { |
| 63 | setprg8(0x8000,reg[6]&0x3F); |
| 64 | setprg8(0xA000,reg[7]&0x3F); |
| 65 | setchr2(0x0000,reg[0]>>1); |
| 66 | setchr2(0x8000,reg[1]>>1); |
| 67 | setchr1(0x1000,reg[2]); |
| 68 | setchr1(0x1400,reg[3]); |
| 69 | setchr1(0x1800,reg[4]); |
| 70 | setchr1(0x1C00,reg[5]); |
| 71 | setmirror(mirr^1); |
| 72 | } |
| 73 | |
| 74 | static DECLFW(UNLSL1632CMDWrite) |
| 75 | { |
| 76 | FCEU_printf("bs %04x %02x\n",A,V); |
| 77 | // if((A&0xA131)==0xA131) brk=V; |
| 78 | if((A&0xA131)==0xA131) brk=V; |
| 79 | if(brk==2) |
| 80 | { |
| 81 | switch(A&0xE001) |
| 82 | { |
| 83 | case 0x8000: cmd=V&7; break; |
| 84 | case 0x8001: reg[cmd]=V; Sync(); break; |
| 85 | case 0xA000: mirr=V&1; break; |
| 86 | case 0xC000: IRQLatch=V; break; |
| 87 | case 0xC001: IRQReload=1; break; |
| 88 | case 0xE000: X6502_IRQEnd(FCEU_IQEXT); IRQa=0; break; |
| 89 | case 0xE001: IRQa=1; break; |
| 90 | } |
| 91 | Sync2(); |
| 92 | } |
| 93 | else |
| 94 | { |
| 95 | switch(A&0xF003) |
| 96 | { |
| 97 | case 0x8000: prg0=V; break; |
| 98 | case 0xA000: prg1=V; break; |
| 99 | case 0x9000: mirr=V&1; break; |
| 100 | case 0xB000: chrcmd[0]=(chrcmd[0]&0xF0)|(V&0x0F); break; |
| 101 | case 0xB001: chrcmd[0]=(chrcmd[0]&0x0F)|(V<<4); break; |
| 102 | case 0xB002: chrcmd[1]=(chrcmd[1]&0xF0)|(V&0x0F); break; |
| 103 | case 0xB003: chrcmd[1]=(chrcmd[1]&0x0F)|(V<<4); break; |
| 104 | case 0xC000: chrcmd[2]=(chrcmd[2]&0xF0)|(V&0x0F); break; |
| 105 | case 0xC001: chrcmd[2]=(chrcmd[2]&0x0F)|(V<<4); break; |
| 106 | case 0xC002: chrcmd[3]=(chrcmd[3]&0xF0)|(V&0x0F); break; |
| 107 | case 0xC003: chrcmd[3]=(chrcmd[3]&0x0F)|(V<<4); break; |
| 108 | case 0xD000: chrcmd[4]=(chrcmd[4]&0xF0)|(V&0x0F); break; |
| 109 | case 0xD001: chrcmd[4]=(chrcmd[4]&0x0F)|(V<<4); break; |
| 110 | case 0xD002: chrcmd[5]=(chrcmd[5]&0xF0)|(V&0x0F); break; |
| 111 | case 0xD003: chrcmd[5]=(chrcmd[5]&0x0F)|(V<<4); break; |
| 112 | case 0xE000: chrcmd[6]=(chrcmd[6]&0xF0)|(V&0x0F); break; |
| 113 | case 0xE001: chrcmd[6]=(chrcmd[6]&0x0F)|(V<<4); break; |
| 114 | case 0xE002: chrcmd[7]=(chrcmd[7]&0xF0)|(V&0x0F); break; |
| 115 | case 0xE003: chrcmd[7]=(chrcmd[7]&0x0F)|(V<<4); break; |
| 116 | } |
| 117 | Sync(); |
| 118 | } |
| 119 | } |
| 120 | |
| 121 | static void UNLSL1632IRQHook(void) |
| 122 | { |
| 123 | int count = IRQCount; |
| 124 | if((scanline==128)&&IRQa)X6502_IRQBegin(FCEU_IQEXT); |
| 125 | if(!count || IRQReload) |
| 126 | { |
| 127 | IRQCount = IRQLatch; |
| 128 | IRQReload = 0; |
| 129 | } |
| 130 | else |
| 131 | IRQCount--; |
| 132 | if(!IRQCount) |
| 133 | { |
| 134 | if(IRQa) |
| 135 | { |
| 136 | X6502_IRQBegin(FCEU_IQEXT); |
| 137 | } |
| 138 | } |
| 139 | } |
| 140 | |
| 141 | static void StateRestore(int version) |
| 142 | { |
| 143 | Sync(); |
| 144 | } |
| 145 | |
| 146 | static void UNLSL1632Power(void) |
| 147 | { |
| 148 | setprg16(0xC000,~0); |
| 149 | SetReadHandler(0x8000,0xFFFF,CartBR); |
| 150 | SetWriteHandler(0x8000,0xFFFF,UNLSL1632CMDWrite); |
| 151 | } |
| 152 | |
| 153 | void UNLSL1632_Init(CartInfo *info) |
| 154 | { |
| 155 | info->Power=UNLSL1632Power; |
| 156 | GameHBIRQHook2=UNLSL1632IRQHook; |
| 157 | GameStateRestore=StateRestore; |
| 158 | AddExState(&StateRegs, ~0, 0, 0); |
| 159 | } |