mirror of
https://github.com/SourMesen/Mesen2.git
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99 lines
2.9 KiB
C++
99 lines
2.9 KiB
C++
#pragma once
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#include "pch.h"
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#include "NES/BaseMapper.h"
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#include "NES/NesConsole.h"
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#include "Shared/BaseControlManager.h"
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#include "NES/Mappers/VsSystem/VsControlManager.h"
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#include "Utilities/Serializer.h"
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class VsSystem : public BaseMapper
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{
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private:
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uint8_t _prgChrSelectBit = 0;
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VsControlManager* _controlManager = nullptr;
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protected:
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uint16_t GetPrgPageSize() override { return 0x2000; }
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uint16_t GetChrPageSize() override { return 0x2000; }
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uint32_t GetWorkRamSize() override { return 0x800; }
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bool EnableCpuClockHook() override { return true; }
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void InitMapper() override
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{
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if(!IsNes20()) {
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//Force VS system if mapper 99
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_romInfo.System = GameSystem::VsSystem;
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if(_prgSize >= 0x10000) {
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_romInfo.VsType = VsSystemType::VsDualSystem;
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} else {
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_romInfo.VsType = VsSystemType::Default;
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}
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}
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//"Note: unlike all other mappers, an undersize mapper 99 image implies open bus instead of mirroring."
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//However, it doesn't look like any game actually rely on this behavior? So not implemented for now.
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bool initialized = false;
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if(_prgSize == 0xC000) {
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//48KB rom == unpadded dualsystem rom
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if(_romInfo.VsType == VsSystemType::VsDualSystem) {
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uint8_t prgOuter = _console->IsVsMainConsole() ? 0 : 3;
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SelectPrgPage(1, 0 + prgOuter);
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SelectPrgPage(2, 1 + prgOuter);
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SelectPrgPage(3, 2 + prgOuter);
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initialized = true;
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} else if(_romInfo.VsType == VsSystemType::RaidOnBungelingBayProtection) {
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if(_console->IsVsMainConsole()) {
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SelectPrgPage(0, 0);
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SelectPrgPage(1, 1);
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SelectPrgPage(2, 2);
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SelectPrgPage(3, 3);
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} else {
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SelectPrgPage(0, 4);
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}
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initialized = true;
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}
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}
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if(!initialized) {
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uint8_t prgOuter = _console->IsVsMainConsole() ? 0 : 4;
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SelectPrgPage(0, 0 | prgOuter);
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SelectPrgPage(1, 1 | prgOuter);
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SelectPrgPage(2, 2 | prgOuter);
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SelectPrgPage(3, 3 | prgOuter);
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}
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uint8_t chrOuter = _console->IsVsMainConsole() ? 0 : 2;
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SelectChrPage(0, 0 | chrOuter);
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_controlManager = (VsControlManager*)_console->GetControlManager();
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}
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void Reset(bool softReset) override
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{
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BaseMapper::Reset(softReset);
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}
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void Serialize(Serializer& s) override
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{
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BaseMapper::Serialize(s);
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SV(_prgChrSelectBit);
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}
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void ProcessCpuClock() override
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{
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BaseProcessCpuClock();
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if(_controlManager && _prgChrSelectBit != _controlManager->GetPrgChrSelectBit()) {
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_prgChrSelectBit = _controlManager->GetPrgChrSelectBit();
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if(_romInfo.VsType == VsSystemType::Default && _prgSize > 0x8000) {
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//"Note: In case of games with 40KiB PRG - ROM(as found in VS Gumshoe), the above bit additionally changes 8KiB PRG - ROM at $8000 - $9FFF."
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//"Only Vs. Gumshoe uses the 40KiB PRG variant; in the iNES encapsulation, the 8KiB banks are arranged as 0, 1, 2, 3, 0alternate, empty"
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SelectPrgPage(0, _prgChrSelectBit << 2);
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}
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uint8_t chrOuter = _console->IsVsMainConsole() ? 0 : 2;
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SelectChrPage(0, _prgChrSelectBit | chrOuter);
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}
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}
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};
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