/*************************************************************************** * Copyright (C) 2007-2010 by Sindre Aamås * * aamas@stud.ntnu.no * * * * This program is free software; you can redistribute it and/or modify * * it under the terms of the GNU General Public License version 2 as * * published by the Free Software Foundation. * * * * This program is distributed in the hope that it will be useful, * * but WITHOUT ANY WARRANTY; without even the implied warranty of * * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * * GNU General Public License version 2 for more details. * * * * You should have received a copy of the GNU General Public License * * version 2 along with this program; if not, write to the * * Free Software Foundation, Inc., * * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * ***************************************************************************/ #include "memptrs.h" #include #include namespace gambatte { MemPtrs::MemPtrs() : rmem_(), wmem_(), romdata_(), wramdata_(), vrambankptr_(0), rsrambankptr_(0), wsrambankptr_(0), memchunk_(0), rambankdata_(0), wramdataend_(0), oamDmaSrc_(OAM_DMA_SRC_OFF), memchunk_len(0) { } MemPtrs::~MemPtrs() { delete []memchunk_; } void MemPtrs::reset(const unsigned rombanks, const unsigned rambanks, const unsigned wrambanks) { delete []memchunk_; memchunk_len = 0x4000 + rombanks * 0x4000ul + 0x4000 + rambanks * 0x2000ul + wrambanks * 0x1000ul + 0x4000; memchunk_ = new unsigned char[memchunk_len]; romdata_[0] = romdata(); rambankdata_ = romdata_[0] + rombanks * 0x4000ul + 0x4000; wramdata_[0] = rambankdata_ + rambanks * 0x2000ul; wramdataend_ = wramdata_[0] + wrambanks * 0x1000ul; std::memset(rdisabledRamw(), 0xFF, 0x2000); oamDmaSrc_ = OAM_DMA_SRC_OFF; rmem_[0x3] = rmem_[0x2] = rmem_[0x1] = rmem_[0x0] = romdata_[0]; rmem_[0xC] = wmem_[0xC] = wramdata_[0] - 0xC000; rmem_[0xE] = wmem_[0xE] = wramdata_[0] - 0xE000; setRombank(1); setRambank(0, 0); setVrambank(0); setWrambank(1); // we save only the ram areas memchunk_saveoffs = vramdata() - memchunk_; memchunk_savelen = wramdataend() - memchunk_ - memchunk_saveoffs; } void MemPtrs::setRombank0(const unsigned bank) { romdata_[0] = romdata() + bank * 0x4000ul; rmem_[0x3] = rmem_[0x2] = rmem_[0x1] = rmem_[0x0] = romdata_[0]; disconnectOamDmaAreas(); } void MemPtrs::setRombank(const unsigned bank) { romdata_[1] = romdata() + bank * 0x4000ul - 0x4000; rmem_[0x7] = rmem_[0x6] = rmem_[0x5] = rmem_[0x4] = romdata_[1]; disconnectOamDmaAreas(); } void MemPtrs::setRambank(const unsigned flags, const unsigned rambank) { unsigned char *const srambankptr = flags & RTC_EN ? 0 : (rambankdata() != rambankdataend() ? rambankdata_ + rambank * 0x2000ul - 0xA000 : wdisabledRam() - 0xA000); rsrambankptr_ = (flags & READ_EN) && srambankptr != wdisabledRam() - 0xA000 ? srambankptr : rdisabledRamw() - 0xA000; wsrambankptr_ = flags & WRITE_EN ? srambankptr : wdisabledRam() - 0xA000; rmem_[0xB] = rmem_[0xA] = rsrambankptr_; wmem_[0xB] = wmem_[0xA] = wsrambankptr_; disconnectOamDmaAreas(); } void MemPtrs::setWrambank(const unsigned bank) { wramdata_[1] = wramdata_[0] + ((bank & 0x07) ? (bank & 0x07) : 1) * 0x1000; rmem_[0xD] = wmem_[0xD] = wramdata_[1] - 0xD000; disconnectOamDmaAreas(); } void MemPtrs::setOamDmaSrc(const OamDmaSrc oamDmaSrc) { rmem_[0x3] = rmem_[0x2] = rmem_[0x1] = rmem_[0x0] = romdata_[0]; rmem_[0x7] = rmem_[0x6] = rmem_[0x5] = rmem_[0x4] = romdata_[1]; rmem_[0xB] = rmem_[0xA] = rsrambankptr_; wmem_[0xB] = wmem_[0xA] = wsrambankptr_; rmem_[0xC] = wmem_[0xC] = wramdata_[0] - 0xC000; rmem_[0xD] = wmem_[0xD] = wramdata_[1] - 0xD000; rmem_[0xE] = wmem_[0xE] = wramdata_[0] - 0xE000; oamDmaSrc_ = oamDmaSrc; disconnectOamDmaAreas(); } void MemPtrs::disconnectOamDmaAreas() { if (isCgb(*this)) { switch (oamDmaSrc_) { case OAM_DMA_SRC_ROM: // fall through case OAM_DMA_SRC_SRAM: case OAM_DMA_SRC_INVALID: std::fill(rmem_, rmem_ + 8, static_cast(0)); rmem_[0xB] = rmem_[0xA] = 0; wmem_[0xB] = wmem_[0xA] = 0; break; case OAM_DMA_SRC_VRAM: break; case OAM_DMA_SRC_WRAM: rmem_[0xE] = rmem_[0xD] = rmem_[0xC] = 0; wmem_[0xE] = wmem_[0xD] = wmem_[0xC] = 0; break; case OAM_DMA_SRC_OFF: break; } } else { switch (oamDmaSrc_) { case OAM_DMA_SRC_ROM: // fall through case OAM_DMA_SRC_SRAM: case OAM_DMA_SRC_WRAM: case OAM_DMA_SRC_INVALID: std::fill(rmem_, rmem_ + 8, static_cast(0)); rmem_[0xB] = rmem_[0xA] = 0; wmem_[0xB] = wmem_[0xA] = 0; rmem_[0xE] = rmem_[0xD] = rmem_[0xC] = 0; wmem_[0xE] = wmem_[0xD] = wmem_[0xC] = 0; break; case OAM_DMA_SRC_VRAM: break; case OAM_DMA_SRC_OFF: break; } } } // all pointers here are relative to memchunk_ #define MSS(a) RSS(a,memchunk_) #define MSL(a) RSL(a,memchunk_) SYNCFUNC(MemPtrs) { int memchunk_len_old = memchunk_len; int memchunk_saveoffs_old = memchunk_saveoffs; int memchunk_savelen_old = memchunk_savelen; NSS(memchunk_len); NSS(memchunk_saveoffs); NSS(memchunk_savelen); if (isReader) { if (memchunk_len != memchunk_len_old || memchunk_saveoffs != memchunk_saveoffs_old || memchunk_savelen != memchunk_savelen_old) __debugbreak(); } PSS(memchunk_ + memchunk_saveoffs, memchunk_savelen); MSS(rmem_[0x0]); MSS(wmem_[0x0]); MSS(rmem_[0x1]); MSS(wmem_[0x1]); MSS(rmem_[0x2]); MSS(wmem_[0x2]); MSS(rmem_[0x3]); MSS(wmem_[0x3]); MSS(rmem_[0x4]); MSS(wmem_[0x4]); MSS(rmem_[0x5]); MSS(wmem_[0x5]); MSS(rmem_[0x6]); MSS(wmem_[0x6]); MSS(rmem_[0x7]); MSS(wmem_[0x7]); MSS(rmem_[0x8]); MSS(wmem_[0x8]); MSS(rmem_[0x9]); MSS(wmem_[0x9]); MSS(rmem_[0xa]); MSS(wmem_[0xa]); MSS(rmem_[0xb]); MSS(wmem_[0xb]); MSS(rmem_[0xc]); MSS(wmem_[0xc]); MSS(rmem_[0xd]); MSS(wmem_[0xd]); MSS(rmem_[0xe]); MSS(wmem_[0xe]); MSS(rmem_[0xf]); MSS(wmem_[0xf]); //for (int i = 0; i < 0x10; i++) //{ // MSS(rmem_[i]); // MSS(wmem_[i]); //} MSS(romdata_[0]); MSS(romdata_[1]); MSS(wramdata_[0]); MSS(wramdata_[1]); MSS(vrambankptr_); MSS(rsrambankptr_); MSS(wsrambankptr_); MSS(rambankdata_); MSS(wramdataend_); NSS(oamDmaSrc_); } }