Emulation/Mesen
1
0
Fork 0
mirror of https://github.com/SourMesen/Mesen.git synced 2024-05-20 05:01:03 -04:00
Code Issues Packages Projects Releases Wiki Activity

Added tentative support for mapper 198 (incomplete?)

Browse source
This commit is contained in:
Sour 2017-12-26 11:46:39 -05:00
parent 4b09f24fe1
commit a40e3de438
4 changed files with 71 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
Core/Core.vcxproj
View file

@ -424,6 +424,7 @@
<ClInclude Include="IInputProvider.h" />
<ClInclude Include="IInputRecorder.h" />
<ClInclude Include="KeyManager.h" />
<ClInclude Include="MMC3_198.h" />
<ClInclude Include="MovieRecorder.h" />
<ClInclude Include="AsciiTurboFile.h" />
<ClInclude Include="SystemActionManager.h" />

3
Core/Core.vcxproj.filters
View file

@ -1354,6 +1354,9 @@
<ClInclude Include="Zapper.h">
<Filter>Nes\Input\Controllers</Filter>
</ClInclude>
<ClInclude Include="MMC3_198.h">
<Filter>Nes\Mappers\MMC</Filter>
</ClInclude>
</ItemGroup>
<ItemGroup>
<ClCompile Include="stdafx.cpp">

65
Core/MMC3_198.h Normal file
View file

@ -0,0 +1,65 @@
#pragma once
#include "stdafx.h"
#include "MMC3.h"
//Most likely incorrect/incomplete, but works (with minor glitches) with the 2 games marked as mapper 198 that I am aware of.
//Game 1: 吞食天地2 (CHR RAM, but uses chr banking?, has save ram at 6000-7FFF?)
//Game 2: Cheng Ji Si Han (ES-1110) (Ch) (CHR RAM, work ram mirrored from 5000-7FFF?, doesn't use chr banking)
//These games may actually use different mappers.
class MMC3_198 : public MMC3
{
private:
uint8_t _exRegs[4];
protected:
uint32_t GetWorkRamSize() override { return 0x1000; }
uint32_t GetWorkRamPageSize() override { return 0x1000; }
uint16_t GetChrRamPageSize() override { return 0x400; }
bool ForceWorkRamSize() override { return true; }
void InitMapper() override
{
_exRegs[0] = 0;
_exRegs[1] = 1;
_exRegs[2] = GetPRGPageCount() - 2;
_exRegs[3] = GetPRGPageCount() - 1;
//Set 4kb of work ram at $5000, mirrored
SetCpuMemoryMapping(0x5000, 0x7FFF, 0, PrgMemoryType::WorkRam);
MMC3::InitMapper();
if(GetSaveRamSize() == 0) {
SetCpuMemoryMapping(0x5000, 0x7FFF, 0, PrgMemoryType::WorkRam);
}
}
void StreamState(bool saving) override
{
MMC3::StreamState(saving);
Stream(_exRegs[0], _exRegs[1], _exRegs[2], _exRegs[3]);
}
void WriteRegister(uint16_t addr, uint8_t value) override
{
if(addr == 0x8001 && (GetState().Reg8000 & 0x07) >= 6) {
_exRegs[(GetState().Reg8000 & 0x07) - 6] = value & (value >= 0x40 ? 0x4F : 0x3F);
}
MMC3::WriteRegister(addr, value);
}
void SelectPRGPage(uint16_t slot, uint16_t page, PrgMemoryType memoryType) override
{
MMC3::SelectPRGPage(slot, _exRegs[slot], memoryType);
}
void UpdateChrMapping() override
{
if(_chrRamSize > 0 && _registers[0] == 0 && _registers[1] == 0 && _registers[2] == 0 && _registers[3] == 0 && _registers[4] == 0 && _registers[5] == 0) {
SelectChrPage8x(0, 0, ChrMemoryType::ChrRam);
} else {
MMC3::UpdateChrMapping();
}
}
};

2
Core/MapperFactory.cpp
View file

@ -150,6 +150,7 @@
#include "MMC3_189.h"
#include "MMC3_196.h"
#include "MMC3_197.h"
#include "MMC3_198.h"
#include "MMC3_199.h"
#include "MMC3_205.h"
#include "MMC3_215.h"
@ -457,6 +458,7 @@ BaseMapper* MapperFactory::GetMapperFromID(RomData &romData)
case 195: return new MMC3_ChrRam(0x00, 0x03, 4);
case 196: return new MMC3_196();
case 197: return new MMC3_197();
case 198: return new MMC3_198();
case 199: return new MMC3_199();
case 200: return new Mapper200();
case 201: return new Mapper201();