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Core: Open bus improvements

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This commit is contained in:
Sour 2019-03-09 00:31:54 -05:00
parent b8624003f0
commit 348da3879b
3 changed files with 13 additions and 4 deletions
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13
Core/MemoryManager.cpp
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@ -15,6 +15,7 @@
void MemoryManager::Initialize(shared_ptr<Console> console)
{
_masterClock = 0;
_openBus = 0;
_console = console;
_regs = console->GetInternalRegisters().get();
_ppu = console->GetPpu();
@ -160,10 +161,10 @@ uint8_t MemoryManager::Read(uint32_t addr, MemoryOperationType type)
uint8_t value;
if(_handlers[addr >> 12]) {
value = _handlers[addr >> 12]->Read(addr);
_openBus = value;
} else {
//open bus
value = (addr >> 12);
value = _openBus;
MessageManager::DisplayMessage("Debug", "Read - missing handler: $" + HexUtilities::ToHex(addr));
}
_console->ProcessCpuRead(addr, value, type);
@ -176,9 +177,10 @@ uint8_t MemoryManager::ReadDma(uint32_t addr)
uint8_t value;
if(_handlers[addr >> 12]) {
value = _handlers[addr >> 12]->Read(addr);
_openBus = value;
} else {
//open bus
value = (addr >> 12);
value = _openBus;
MessageManager::DisplayMessage("Debug", "Read - missing handler: $" + HexUtilities::ToHex(addr));
}
_console->ProcessCpuRead(addr, value, MemoryOperationType::DmaRead);
@ -226,6 +228,11 @@ void MemoryManager::WriteDma(uint32_t addr, uint8_t value)
}
}
uint8_t MemoryManager::GetOpenBus()
{
return _openBus;
}
uint64_t MemoryManager::GetMasterClock()
{
return _masterClock;

2
Core/MemoryManager.h
View file

@ -30,6 +30,7 @@ private:
vector<unique_ptr<RamHandler>> _workRamHandlers;
uint8_t *_workRam;
uint8_t _openBus;
uint64_t _masterClock;
uint8_t _masterClockTable[2][0x10000];
@ -56,6 +57,7 @@ public:
void Write(uint32_t addr, uint8_t value, MemoryOperationType type);
void WriteDma(uint32_t addr, uint8_t value);
uint8_t GetOpenBus();
uint64_t GetMasterClock();
uint8_t* DebugGetWorkRam();

2
Core/Ppu.cpp
View file

@ -1255,7 +1255,7 @@ uint8_t Ppu::Read(uint16_t addr)
break;
}
return addr >> 8;
return _console->GetMemoryManager()->GetOpenBus();
}
void Ppu::Write(uint32_t addr, uint8_t value)