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Mapper 42 support

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This commit is contained in:
Souryo 2016-07-16 22:17:21 -04:00
parent 14492774eb
commit 0f3921f346
4 changed files with 83 additions and 1 deletions
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1
Core/Core.vcxproj
View file

@ -444,6 +444,7 @@
<ClInclude Include="Mapper230.h" />
<ClInclude Include="Mapper241.h" />
<ClInclude Include="Mapper40.h" />
<ClInclude Include="Mapper42.h" />
<ClInclude Include="Mapper50.h" />
<ClInclude Include="Mapper60.h" />
<ClInclude Include="MMC1_155.h" />

3
Core/Core.vcxproj.filters
View file

@ -703,6 +703,9 @@
<ClInclude Include="Mapper50.h">
<Filter>Nes\Mappers\Unnamed</Filter>
</ClInclude>
<ClInclude Include="Mapper42.h">
<Filter>Nes\Mappers\Unnamed</Filter>
</ClInclude>
</ItemGroup>
<ItemGroup>
<ClCompile Include="stdafx.cpp">

76
Core/Mapper42.h Normal file
View file

@ -0,0 +1,76 @@
#pragma once
#include "stdafx.h"
#include "BaseMapper.h"
#include "CPU.h"
class Mapper42 : public BaseMapper
{
private:
uint16_t _irqCounter;
bool _irqEnabled;
protected:
virtual uint16_t GetPRGPageSize() { return 0x2000; }
virtual uint16_t GetCHRPageSize() { return 0x2000; }
void InitMapper()
{
_irqCounter = 0;
_irqEnabled = false;
SelectPRGPage(0, 0x0C);
SelectPRGPage(1, 0x0D);
SelectPRGPage(2, 0x0E);
SelectPRGPage(3, 0x0F);
SelectCHRPage(0, 0);
}
void StreamState(bool saving)
{
BaseMapper::StreamState(saving);
Stream(_irqCounter, _irqEnabled);
}
void ProcessCpuClock()
{
if(_irqEnabled) {
_irqCounter++;
if(_irqCounter >= 0x8000) {
_irqCounter -= 0x8000;
}
if(_irqCounter >= 0x6000) {
CPU::SetIRQSource(IRQSource::External);
} else {
CPU::ClearIRQSource(IRQSource::External);
}
}
}
void WriteRegister(uint16_t addr, uint8_t value)
{
switch(addr & 0xE003) {
case 0x8000:
if(_chrRomSize > 0) {
SelectCHRPage(0, value & 0x0F);
}
break;
case 0xE000:
SetCpuMemoryMapping(0x6000, 0x7FFF, value & 0x0F, PrgMemoryType::PrgRom);
break;
case 0xE001:
SetMirroringType(value & 0x08 ? MirroringType::Horizontal : MirroringType::Vertical);
break;
case 0xE002:
_irqEnabled = (value == 0x02);
if(!_irqEnabled) {
CPU::ClearIRQSource(IRQSource::External);
_irqCounter = 0;
}
break;
}
}
};

4
Core/MapperFactory.cpp
View file

@ -28,6 +28,7 @@
#include "JalecoSs88006.h"
#include "Mapper15.h"
#include "Mapper40.h"
#include "Mapper42.h"
#include "Mapper50.h"
#include "Mapper57.h"
#include "Mapper58.h"
@ -118,7 +119,7 @@ Supported mappers: (... denotes bad mappers)
-----------------------------------------------------------------
| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10| 11| 12| 13| | 15|
| 16| 17| 18| 19|...| 21| 22| 23| 24| 25| 26| 27| | | | 31|
| 32| 33| 34| | | 37| 38| | 40| | | | 44| 45| | 47|
| 32| 33| 34| | | 37| 38| | 40| | 42| | 44| 45| | 47|
| | 49| 50| | 52| | | | | 57| 58| | 60| 61| 62| |
| 64| 65| 66| 67| 68| 69| 70| 71| 72| 73| 74| 75| 76| 77| 78| 79|
| 80| | 82| | | 85| 86| 87| 88| 89| | 91| 92| 93| 94| 95|
@ -183,6 +184,7 @@ BaseMapper* MapperFactory::GetMapperFromID(RomData &romData)
case 37: return new MMC3_37();
case 38: return new UnlPci556();
case 40: return new Mapper40();
case 42: return new Mapper42();
case 44: return new MMC3_44();
case 45: return new MMC3_45();
case 47: return new MMC3_47();