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Mapper 115: Fixed issue with Thunderbolt 2

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Sour 2018-04-16 11:34:26 -04:00
parent 79bd6c137d
commit b38505a4a4
1 changed files with 35 additions and 12 deletions
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47
Core/MMC3_115.h
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@ -8,41 +8,64 @@ class MMC3_115 : public MMC3
private:
uint8_t _prgReg = 0;
uint8_t _chrReg = 0;
uint8_t _protectionReg = 0;
protected:
virtual uint16_t RegisterStartAddress() override { return 0x6000; }
bool AllowRegisterRead() override { return true; }
virtual void SelectCHRPage(uint16_t slot, uint16_t page, ChrMemoryType memoryType = ChrMemoryType::Default) override
void InitMapper() override
{
AddRegisterRange(0x4100, 0x7FFF, MemoryOperation::Write);
AddRegisterRange(0x5000, 0x5FFF, MemoryOperation::Read);
RemoveRegisterRange(0x8000, 0xFFFF, MemoryOperation::Read);
MMC3::InitMapper();
}
void SelectCHRPage(uint16_t slot, uint16_t page, ChrMemoryType memoryType = ChrMemoryType::Default) override
{
page |= (_chrReg << 8);
BaseMapper::SelectCHRPage(slot, page);
}
virtual void UpdateState() override
void UpdateState() override
{
MMC3::UpdateState();
if(_prgReg & 0x80) {
SelectPRGPage(0, (_prgReg & 0x0F) << 1);
SelectPRGPage(1, ((_prgReg & 0x0F) << 1) + 1);
if(_prgReg & 0x20) {
SelectPrgPage4x(0, ((_prgReg & 0x0F) >> 1) << 2);
} else {
SelectPrgPage2x(0, (_prgReg & 0x0F) << 1);
SelectPrgPage2x(1, (_prgReg & 0x0F) << 1);
}
}
}
virtual void WriteRegister(uint16_t addr, uint8_t value) override
uint8_t ReadRegister(uint16_t addr) override
{
return _protectionReg;
}
void WriteRegister(uint16_t addr, uint8_t value) override
{
if(addr < 0x8000) {
if(addr & 0x01) {
_chrReg = value & 0x01;
if(addr == 0x5080) {
_protectionReg = value;
} else {
_prgReg = value;
if(addr & 0x01) {
_chrReg = value & 0x01;
} else {
_prgReg = value;
}
UpdateState();
}
UpdateState();
} else {
MMC3::WriteRegister(addr, value);
}
}
virtual void StreamState(bool saving) override
void StreamState(bool saving) override
{
MMC3::StreamState(saving);
Stream(_prgReg, _chrReg);