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CNROM (iNES mapper 3) support

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This commit is contained in:
Souryo 2014-06-24 14:28:19 -04:00
parent eaa528ded8
commit 617f5ead23
7 changed files with 89 additions and 45 deletions
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42
Core/BaseMapper.h
View file

@ -154,46 +154,4 @@ class BaseMapper : public IMemoryHandler
{
_chrPages[AddrToCHRSlot(addr)][addr & (GetCHRPageSize() - 1)] = value;
}
};
class DefaultMapper : public BaseMapper
{
protected:
virtual uint32_t GetPRGPageSize() { return 0x4000; }
virtual uint32_t GetCHRPageSize() { return 0x2000; }
virtual void InitMapper()
{
if(_prgSize == 0x4000) {
SelectPRGPage(0, 0);
SelectPRGPage(1, 0);
} else {
SelectPRGPage(0, 0);
SelectPRGPage(1, 1);
}
SelectCHRPage(0, 0);
}
};
class Mapper2 : public BaseMapper
{
protected:
virtual uint32_t GetPRGPageSize() { return 0x4000; }
virtual uint32_t GetCHRPageSize() { return 0x2000; }
void InitMapper()
{
//First and last PRG page
SelectPRGPage(0, 0);
SelectPRGPage(1, 0xFF);
SelectCHRPage(0, 0);
}
public:
void WriteRAM(uint16_t addr, uint8_t value)
{
SelectPRGPage(0, value);
}
};

22
Core/CNROM.h Normal file
View file

@ -0,0 +1,22 @@
#pragma once
#include "stdafx.h"
#include "BaseMapper.h"
class CNROM : public BaseMapper
{
protected:
virtual uint32_t GetPRGPageSize() { return 0x8000; }
virtual uint32_t GetCHRPageSize() { return 0x2000; }
void InitMapper()
{
SelectPRGPage(0, 0);
SelectCHRPage(0, 0);
}
public:
void WriteRAM(uint16_t addr, uint8_t value)
{
SelectCHRPage(0, value);
}
};

3
Core/Core.vcxproj
View file

@ -89,6 +89,7 @@
<ItemGroup>
<ClInclude Include="APU.h" />
<ClInclude Include="BaseMapper.h" />
<ClInclude Include="CNROM.h" />
<ClInclude Include="ControlManager.h" />
<ClInclude Include="IAudioDevice.h" />
<ClInclude Include="IControlDevice.h" />
@ -108,12 +109,14 @@
<ClInclude Include="Nes_Apu\Nes_Oscs.h" />
<ClInclude Include="Nes_Apu\Nes_Vrc6.h" />
<ClInclude Include="Nes_Apu\Nonlinear_Buffer.h" />
<ClInclude Include="NROM.h" />
<ClInclude Include="PPU.h" />
<ClInclude Include="CPU.h" />
<ClInclude Include="MemoryManager.h" />
<ClInclude Include="ROMLoader.h" />
<ClInclude Include="stdafx.h" />
<ClInclude Include="targetver.h" />
<ClInclude Include="UNROM.h" />
</ItemGroup>
<ItemGroup>
<ClCompile Include="APU.cpp" />

9
Core/Core.vcxproj.filters
View file

@ -105,6 +105,15 @@
<ClInclude Include="MMC1.h">
<Filter>Header Files\Mappers</Filter>
</ClInclude>
<ClInclude Include="NROM.h">
<Filter>Header Files\Mappers</Filter>
</ClInclude>
<ClInclude Include="CNROM.h">
<Filter>Header Files\Mappers</Filter>
</ClInclude>
<ClInclude Include="UNROM.h">
<Filter>Header Files\Mappers</Filter>
</ClInclude>
</ItemGroup>
<ItemGroup>
<ClCompile Include="CPU.cpp">

10
Core/MapperFactory.h
View file

@ -1,6 +1,8 @@
#include "stdafx.h"
#include "BaseMapper.h"
#include "NROM.h"
#include "MMC1.h"
#include "UNROM.h"
#include "CNROM.h"
#include "ROMLoader.h"
class MapperFactory
@ -14,9 +16,11 @@ class MapperFactory
BaseMapper* mapper = nullptr;
switch(mapperID) {
case 0: mapper = new DefaultMapper(); break;
case 0: mapper = new NROM(); break;
case 1: mapper = new MMC1(); break;
case 2: mapper = new Mapper2(); break;
case 2: mapper = new UNROM(); break;
case 3: mapper = new CNROM(); break;
//case 4: mapper = new MMC3(); break;
}
if(!mapper) {

23
Core/NROM.h Normal file
View file

@ -0,0 +1,23 @@
#pragma once
#include "stdafx.h"
#include "BaseMapper.h"
class NROM : public BaseMapper
{
protected:
virtual uint32_t GetPRGPageSize() { return 0x4000; }
virtual uint32_t GetCHRPageSize() { return 0x2000; }
virtual void InitMapper()
{
if(_prgSize == 0x4000) {
SelectPRGPage(0, 0);
SelectPRGPage(1, 0);
} else {
SelectPRGPage(0, 0);
SelectPRGPage(1, 1);
}
SelectCHRPage(0, 0);
}
};

25
Core/UNROM.h Normal file
View file

@ -0,0 +1,25 @@
#pragma once
#include "stdafx.h"
#include "BaseMapper.h"
class UNROM : public BaseMapper
{
protected:
virtual uint32_t GetPRGPageSize() { return 0x4000; }
virtual uint32_t GetCHRPageSize() { return 0x2000; }
void InitMapper()
{
//First and last PRG page
SelectPRGPage(0, 0);
SelectPRGPage(1, -1);
SelectCHRPage(0, 0);
}
public:
void WriteRAM(uint16_t addr, uint8_t value)
{
SelectPRGPage(0, value);
}
};