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Merge pull request #44 from Gumball2415/feature-add-2a03-interference

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Refactor audio interference code
This commit is contained in:
NovaSquirrel 2021-08-15 12:00:26 -04:00 • committed by GitHub
commit c5ac9ecb74
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GPG key ID: 4AEE18F83AFDEB23
6 changed files with 12 additions and 11 deletions
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6
Core/Console.cpp
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@ -473,10 +473,10 @@ void Console::ProcessCpuClock()
void Console::ProcessInterferenceAudio()
{
_InvA13 = (_ppu->_A13pinLow == 1) ? 0 : 1; // invert relative to 2A03
_InvA13 = _ppu->_A13pinLowSum;
_ppu->_A13pinLowSum = 0;
_controlManager->GetInvOE1(_controlManager->_address);
_InvOE1 = (_controlManager->_OE1pinLow == 1) ? 0 : 1; // invert relative to 2A03
_InvOE1 = !_controlManager->GetInvOE1(_controlManager->_address); // invert relative to 2A03
if (_controlManager->_strobed == true)
_controlManager->_strobed = false;

5
Core/ControlManager.cpp
View file

@ -351,11 +351,12 @@ void ControlManager::WriteRAM(uint16_t addr, uint8_t value)
}
}
void ControlManager::GetInvOE1(uint16_t addr)
bool ControlManager::GetInvOE1(uint16_t addr)
{
// pull low for only one clock
if (addr == 0x4016)
_OE1pinLow = (_strobed) ? 0 : 1;
_OE1pinLow = !_strobed;
return _OE1pinLow;
}
void ControlManager::Reset(bool softReset)

4
Core/ControlManager.h
View file

@ -43,7 +43,7 @@ protected:
virtual uint8_t GetOpenBusMask(uint8_t port);
public:
uint8_t _OE1pinLow;
bool _OE1pinLow;
uint16_t _address;
bool _strobed;
@ -85,5 +85,5 @@ public:
virtual uint8_t ReadRAM(uint16_t addr) override;
virtual void WriteRAM(uint16_t addr, uint8_t value) override;
void GetInvOE1(uint16_t addr);
bool GetInvOE1(uint16_t addr);
};

2
Core/PPU.cpp
View file

@ -466,7 +466,7 @@ void PPU::WriteRAM(uint16_t addr, uint8_t value)
void PPU::GetInvA13()
{
// pull level high when PPU/VRAM addr bit 13 is low
_A13pinLow = (_ppuBusAddress & 0x2000) ? 0 : 1;
_A13pinLowSum += (bool)(_ppuBusAddress & 0x2000); // invert relative to 2A03
}
uint8_t PPU::ReadPaletteRAM(uint16_t addr)

2
Core/PPU.h
View file

@ -180,7 +180,7 @@ class PPU : public IMemoryHandler, public Snapshotable
static constexpr int32_t OutputBufferSize = 256*240*2;
static constexpr int32_t OamDecayCycleCount = 3000;
uint8_t _A13pinLow;
uint8_t _A13pinLowSum;
PPU(shared_ptr<Console> console);
virtual ~PPU();

4
Core/SoundMixer.cpp
View file

@ -277,8 +277,8 @@ int16_t SoundMixer::GetOutputVolume(bool forRightChannel)
#endif
GetChannelOutput(AudioChannel::EPSM_L, forRightChannel) * 4 +
GetChannelOutput(AudioChannel::EPSM_R, forRightChannel) * 4 +
GetChannelOutput(AudioChannel::InvA13, forRightChannel) * 20 +
GetChannelOutput(AudioChannel::InvOE1, forRightChannel) * 1000
(GetChannelOutput(AudioChannel::InvA13, forRightChannel) * 20) / 3.0 + // 3 PPU samples per CPU clock
GetChannelOutput(AudioChannel::InvOE1, forRightChannel) * 100
);
}