Mapper 115: Fixed issue with Thunderbolt 2
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79bd6c137d
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b38505a4a4
1 changed files with 35 additions and 12 deletions
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@ -8,41 +8,64 @@ class MMC3_115 : public MMC3
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private:
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uint8_t _prgReg = 0;
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uint8_t _chrReg = 0;
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uint8_t _protectionReg = 0;
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protected:
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virtual uint16_t RegisterStartAddress() override { return 0x6000; }
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bool AllowRegisterRead() override { return true; }
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virtual void SelectCHRPage(uint16_t slot, uint16_t page, ChrMemoryType memoryType = ChrMemoryType::Default) override
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void InitMapper() override
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{
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AddRegisterRange(0x4100, 0x7FFF, MemoryOperation::Write);
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AddRegisterRange(0x5000, 0x5FFF, MemoryOperation::Read);
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RemoveRegisterRange(0x8000, 0xFFFF, MemoryOperation::Read);
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MMC3::InitMapper();
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}
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void SelectCHRPage(uint16_t slot, uint16_t page, ChrMemoryType memoryType = ChrMemoryType::Default) override
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{
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page |= (_chrReg << 8);
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BaseMapper::SelectCHRPage(slot, page);
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}
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virtual void UpdateState() override
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void UpdateState() override
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{
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MMC3::UpdateState();
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if(_prgReg & 0x80) {
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SelectPRGPage(0, (_prgReg & 0x0F) << 1);
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SelectPRGPage(1, ((_prgReg & 0x0F) << 1) + 1);
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if(_prgReg & 0x20) {
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SelectPrgPage4x(0, ((_prgReg & 0x0F) >> 1) << 2);
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} else {
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SelectPrgPage2x(0, (_prgReg & 0x0F) << 1);
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SelectPrgPage2x(1, (_prgReg & 0x0F) << 1);
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}
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}
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}
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virtual void WriteRegister(uint16_t addr, uint8_t value) override
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uint8_t ReadRegister(uint16_t addr) override
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{
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return _protectionReg;
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}
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void WriteRegister(uint16_t addr, uint8_t value) override
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{
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if(addr < 0x8000) {
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if(addr & 0x01) {
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_chrReg = value & 0x01;
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if(addr == 0x5080) {
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_protectionReg = value;
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} else {
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_prgReg = value;
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if(addr & 0x01) {
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_chrReg = value & 0x01;
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} else {
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_prgReg = value;
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}
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UpdateState();
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}
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UpdateState();
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} else {
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MMC3::WriteRegister(addr, value);
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}
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}
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virtual void StreamState(bool saving) override
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void StreamState(bool saving) override
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{
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MMC3::StreamState(saving);
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Stream(_prgReg, _chrReg);
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