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Add 4 Pak All Action mapper. Fix #115
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,131 @@ | ||
| /* | ||
| * Gearsystem - Sega Master System / Game Gear Emulator | ||
| * Copyright (C) 2013 Ignacio Sanchez | ||
| * This program is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License as published by | ||
| * the Free Software Foundation, either version 3 of the License, or | ||
| * any later version. | ||
| * 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 for more details. | ||
| * You should have received a copy of the GNU General Public License | ||
| * along with this program. If not, see http://www.gnu.org/licenses/ | ||
| * | ||
| */ | ||
|
|
||
| #include "Multi4PAKAllActionMemoryRule.h" | ||
| #include "Memory.h" | ||
| #include "Cartridge.h" | ||
|
|
||
| Multi4PAKAllActionMemoryRule::Multi4PAKAllActionMemoryRule(Memory* pMemory, Cartridge* pCartridge, Input* pInput) : MemoryRule(pMemory, pCartridge, pInput) | ||
| { | ||
| Reset(); | ||
| } | ||
|
|
||
| Multi4PAKAllActionMemoryRule::~Multi4PAKAllActionMemoryRule() | ||
| { | ||
| } | ||
|
|
||
| u8 Multi4PAKAllActionMemoryRule::PerformRead(u16 address) | ||
| { | ||
| if (address < 0xC000) | ||
| { | ||
| int slot = (address >> 14) & 0x03; | ||
| if (slot > 3) | ||
| { | ||
| Debug("--> ** Invalid slot %d", slot); | ||
| return 0xFF; | ||
| } | ||
| return m_pCartridge->GetROM()[m_iMapperSlotAddress[slot] + (address & 0x3FFF)]; | ||
| } | ||
| else | ||
| { | ||
| // RAM + RAM mirror | ||
| return m_pMemory->Retrieve(address); | ||
| } | ||
| } | ||
|
|
||
| void Multi4PAKAllActionMemoryRule::PerformWrite(u16 address, u8 value) | ||
| { | ||
| if (address < 0xC000) | ||
| { | ||
| switch (address) | ||
| { | ||
| case 0x3FFE: | ||
| Debug("--> ** Writing to register $%X %X", address, value); | ||
| m_iMapperSlot[0] = value; | ||
| m_iMapperSlotAddress[0] = 0x4000 * (m_iMapperSlot[0] & (m_pCartridge->GetROMBankCount() - 1)); | ||
| return; | ||
| case 0x7FFF: | ||
| Debug("--> ** Writing to register $%X %X", address, value); | ||
| m_iMapperSlot[1] = value; | ||
| m_iMapperSlotAddress[1] = 0x4000 * (m_iMapperSlot[1] & (m_pCartridge->GetROMBankCount() - 1)); | ||
| return; | ||
| case 0xBFFF: | ||
| Debug("--> ** Writing to register $%X %X", address, value); | ||
| m_iMapperSlot[2] = value; | ||
| m_iMapperSlotAddress[2] = 0x4000 * (((m_iMapperSlot[0] & 0x30) + value) & (m_pCartridge->GetROMBankCount() - 1)); | ||
| return; | ||
| default: | ||
| Debug("--> ** Attempting to write on ROM address $%X %X", address, value); | ||
| return; | ||
| } | ||
| } | ||
| else if (address < 0xE000) | ||
| { | ||
| // RAM | ||
| m_pMemory->Load(address, value); | ||
| m_pMemory->Load(address + 0x2000, value); | ||
| } | ||
| else | ||
| { | ||
| // RAM (mirror) | ||
| m_pMemory->Load(address, value); | ||
| m_pMemory->Load(address - 0x2000, value); | ||
| } | ||
| } | ||
|
|
||
| void Multi4PAKAllActionMemoryRule::Reset() | ||
| { | ||
| m_iMapperSlot[0] = 0; | ||
| m_iMapperSlot[1] = 1; | ||
| m_iMapperSlot[2] = 2; | ||
|
|
||
| m_iMapperSlotAddress[0] = 0x0000; | ||
| m_iMapperSlotAddress[1] = 0x4000; | ||
| m_iMapperSlotAddress[2] = 0x8000; | ||
| } | ||
|
|
||
| u8* Multi4PAKAllActionMemoryRule::GetPage(int index) | ||
| { | ||
| if (index < 0 || index > 2) | ||
| return m_pCartridge->GetROM(); | ||
|
|
||
| return m_pCartridge->GetROM() + (m_iMapperSlot[index] * 0x4000); | ||
| } | ||
|
|
||
| int Multi4PAKAllActionMemoryRule::GetBank(int index) | ||
| { | ||
| if (index < 0 || index > 2) | ||
| return 0; | ||
|
|
||
| return m_iMapperSlot[index]; | ||
| } | ||
|
|
||
| void Multi4PAKAllActionMemoryRule::SaveState(std::ostream& stream) | ||
| { | ||
| stream.write(reinterpret_cast<const char*> (m_iMapperSlotAddress), sizeof(m_iMapperSlotAddress)); | ||
| stream.write(reinterpret_cast<const char*> (m_iMapperSlot), sizeof(m_iMapperSlot)); | ||
| } | ||
|
|
||
| void Multi4PAKAllActionMemoryRule::LoadState(std::istream& stream) | ||
| { | ||
| using namespace std; | ||
|
|
||
| stream.read(reinterpret_cast<char*> (m_iMapperSlotAddress), sizeof(m_iMapperSlotAddress)); | ||
| stream.read(reinterpret_cast<char*> (m_iMapperSlot), sizeof(m_iMapperSlot)); | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,43 @@ | ||
| /* | ||
| * Gearsystem - Sega Master System / Game Gear Emulator | ||
| * Copyright (C) 2013 Ignacio Sanchez | ||
| * This program is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License as published by | ||
| * the Free Software Foundation, either version 3 of the License, or | ||
| * any later version. | ||
| * 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 for more details. | ||
| * You should have received a copy of the GNU General Public License | ||
| * along with this program. If not, see http://www.gnu.org/licenses/ | ||
| * | ||
| */ | ||
|
|
||
| #ifndef MULTI4PAKALLACTIONMEMORYRULE_H | ||
| #define MULTI4PAKALLACTIONMEMORYRULE_H | ||
|
|
||
| #include "MemoryRule.h" | ||
|
|
||
| class Multi4PAKAllActionMemoryRule : public MemoryRule | ||
| { | ||
| public: | ||
| Multi4PAKAllActionMemoryRule(Memory* pMemory, Cartridge* pCartridge, Input* pInput); | ||
| virtual ~Multi4PAKAllActionMemoryRule(); | ||
| virtual u8 PerformRead(u16 address); | ||
| virtual void PerformWrite(u16 address, u8 value); | ||
| virtual void Reset(); | ||
| virtual u8* GetPage(int index); | ||
| virtual int GetBank(int index); | ||
| virtual void SaveState(std::ostream& stream); | ||
| virtual void LoadState(std::istream& stream); | ||
|
|
||
| private: | ||
| int m_iMapperSlot[3]; | ||
| int m_iMapperSlotAddress[3]; | ||
| }; | ||
|
|
||
| #endif /* MULTI4PAKALLACTIONMEMORYRULE_H */ |
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