71 lines
1.4 KiB
C++
71 lines
1.4 KiB
C++
#pragma once
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#include "stdafx.h"
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#include "IMemoryHandler.h"
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#include "Sa1Cpu.h"
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#include "Sa1Types.h"
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class Sa1VectorHandler : public IMemoryHandler
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{
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private:
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IMemoryHandler* _handler;
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Sa1State* _state;
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public:
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Sa1VectorHandler(IMemoryHandler* handler, Sa1State* state) : IMemoryHandler(handler->GetMemoryType())
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{
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_handler = handler;
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_state = state;
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}
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uint8_t Read(uint32_t addr) override
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{
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if (addr >= Sa1Cpu::NmiVector && addr <= Sa1Cpu::ResetVector + 1)
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{
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//Override the regular handlers
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if (_state->UseCpuNmiVector)
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{
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if (addr == Sa1Cpu::NmiVector)
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{
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return (uint8_t)_state->CpuNmiVector;
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}
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else if (addr == Sa1Cpu::NmiVector + 1)
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{
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return (uint8_t)(_state->CpuNmiVector >> 8);
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}
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}
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if (_state->UseCpuIrqVector)
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{
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if (addr == Sa1Cpu::IrqVector)
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{
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return (uint8_t)_state->CpuIrqVector;
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}
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else if (addr == Sa1Cpu::IrqVector + 1)
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{
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return (uint8_t)(_state->CpuIrqVector >> 8);
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}
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}
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}
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return _handler->Read(addr);
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}
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uint8_t Peek(uint32_t addr) override
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{
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return Read(addr);
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}
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void PeekBlock(uint32_t addr, uint8_t* output) override
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{
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_handler->PeekBlock(addr, output);
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}
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void Write(uint32_t addr, uint8_t value) override
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{
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_handler->Write(addr, value);
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}
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AddressInfo GetAbsoluteAddress(uint32_t address) override
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{
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return _handler->GetAbsoluteAddress(address);
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}
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};
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