1 //////////////////////////////////////////////////////////////////////////////////////// 2 // 3 // Nestopia - NES/Famicom emulator written in C++ 4 // 5 // Copyright (C) 2003-2008 Martin Freij 6 // 7 // This file is part of Nestopia. 8 // 9 // Nestopia is free software; you can redistribute it and/or modify 10 // it under the terms of the GNU General Public License as published by 11 // the Free Software Foundation; either version 2 of the License, or 12 // (at your option) any later version. 13 // 14 // Nestopia is distributed in the hope that it will be useful, 15 // but WITHOUT ANY WARRANTY; without even the implied warranty of 16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 // GNU General Public License for more details. 18 // 19 // You should have received a copy of the GNU General Public License 20 // along with Nestopia; if not, write to the Free Software 21 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 22 // 23 //////////////////////////////////////////////////////////////////////////////////////// 24 25 #include "NstBoard.hpp" 26 #include "NstBoardTxc.hpp" 27 28 namespace Nes 29 { 30 namespace Core 31 { 32 namespace Boards 33 { 34 namespace Txc 35 { 36 #ifdef NST_MSVC_OPTIMIZE 37 #pragma optimize("s", on) 38 #endif 39 SubReset(const bool hard)40 void T22211A::SubReset(const bool hard) 41 { 42 Map( 0x4100U, &T22211A::Peek_4100 ); 43 Map( 0x4100U, 0x4103U, &T22211A::Poke_4100 ); 44 Map( 0x8000U, 0xFFFFU, &T22211A::Poke_8000 ); 45 46 if (hard) 47 { 48 for (uint i=0; i < 4; ++i) 49 regs[i] = 0; 50 51 prg.SwapBank<SIZE_32K,0x0000>(0); 52 } 53 } 54 SubReset(const bool hard)55 void T22211B::SubReset(const bool hard) 56 { 57 T22211A::SubReset( hard ); 58 59 Map( 0x8000U, 0xFFFFU, &T22211B::Poke_8000 ); 60 } 61 SubReset(const bool hard)62 void T22211C::SubReset(const bool hard) 63 { 64 T22211A::SubReset( hard ); 65 66 Map( 0x4100U, &T22211C::Peek_4100 ); 67 } 68 SubLoad(State::Loader & state,const dword baseChunk)69 void T22211A::SubLoad(State::Loader& state,const dword baseChunk) 70 { 71 NST_VERIFY( baseChunk == (AsciiId<'T','2','1'>::V) ); 72 73 if (baseChunk == AsciiId<'T','2','1'>::V) 74 { 75 while (const dword chunk = state.Begin()) 76 { 77 if (chunk == AsciiId<'R','E','G'>::V) 78 state.Read( regs ); 79 80 state.End(); 81 } 82 } 83 } 84 SubSave(State::Saver & state) const85 void T22211A::SubSave(State::Saver& state) const 86 { 87 state.Begin( AsciiId<'T','2','1'>::V ).Begin( AsciiId<'R','E','G'>::V ).Write( regs ).End().End(); 88 } 89 90 #ifdef NST_MSVC_OPTIMIZE 91 #pragma optimize("", on) 92 #endif 93 94 NES_PEEK(T22211A,4100) 95 { 96 return (uint(regs[1]) ^ regs[2]) | 0x40; 97 } 98 99 NES_PEEK(T22211C,4100) 100 { 101 return (uint(regs[1]) ^ regs[2]) | 0x41; 102 } 103 104 NES_POKE_AD(T22211A,4100) 105 { 106 regs[address & 0x3] = data; 107 } 108 109 NES_POKE(T22211A,8000) 110 { 111 ppu.Update(); 112 prg.SwapBank<SIZE_32K,0x0000>( regs[2] >> 2 ); 113 chr.SwapBank<SIZE_8K,0x0000>( regs[2] ); 114 } 115 116 NES_POKE_D(T22211B,8000) 117 { 118 ppu.Update(); 119 prg.SwapBank<SIZE_32K,0x0000>( regs[2] >> 2 ); 120 chr.SwapBank<SIZE_8K,0x0000>( ((data^regs[2]) >> 3 & 0x2) | ((data^regs[2]) >> 5 & 0x1) ); 121 } 122 } 123 } 124 } 125 } 126