75 lines
1.8 KiB
C
75 lines
1.8 KiB
C
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#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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bool _forSnesCpu;
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public:
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Sa1VectorHandler(IMemoryHandler* handler, Sa1State* state, bool forSnesCpu)
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{
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_handler = handler;
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_state = state;
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_forSnesCpu = forSnesCpu;
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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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//Override the regular handlers
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if(_forSnesCpu) {
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if(_state->UseCpuNmiVector) {
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if(addr == Sa1Cpu::NmiVector) {
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return (uint8_t)_state->CpuNmiVector;
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} else if(addr == Sa1Cpu::NmiVector + 1) {
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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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if(addr == Sa1Cpu::IrqVector) {
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return (uint8_t)_state->CpuIrqVector;
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} else if(addr == Sa1Cpu::IrqVector + 1) {
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return (uint8_t)(_state->CpuIrqVector >> 8);
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}
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}
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} else {
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switch(addr) {
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case Sa1Cpu::NmiVector: return (uint8_t)_state->Sa1NmiVector;
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case Sa1Cpu::NmiVector + 1: return (uint8_t)(_state->Sa1NmiVector >> 8);
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case Sa1Cpu::ResetVector: return (uint8_t)_state->Sa1ResetVector;
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case Sa1Cpu::ResetVector + 1: return (uint8_t)(_state->Sa1ResetVector >> 8);
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case Sa1Cpu::IrqVector: return (uint8_t)_state->Sa1IrqVector;
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case Sa1Cpu::IrqVector + 1: return (uint8_t)(_state->Sa1IrqVector >> 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(uint8_t *output) override
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{
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_handler->PeekBlock(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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