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https://github.com/SourMesen/Mesen-S.git
synced 2024-06-23 06:41:55 -04:00
6539b92502
Memory handlers did not have the _memoryType value set, which caused some memory accesses to be much faster than expected
91 lines
2.6 KiB
C++
91 lines
2.6 KiB
C++
#include "stdafx.h"
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#include "RegisterHandlerB.h"
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#include "Console.h"
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#include "Ppu.h"
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#include "Spc.h"
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#include "BaseCartridge.h"
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#include "Sa1.h"
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#include "Msu1.h"
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#include "CheatManager.h"
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#include "../Utilities/Serializer.h"
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RegisterHandlerB::RegisterHandlerB(Console *console, Ppu * ppu, Spc * spc, uint8_t * workRam) : IMemoryHandler(SnesMemoryType::Register)
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{
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_console = console;
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_cheatManager = console->GetCheatManager().get();
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_sa1 = console->GetCartridge()->GetSa1();
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_ppu = ppu;
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_spc = spc;
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_msu1 = console->GetMsu1().get();
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_workRam = workRam;
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_wramPosition = 0;
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}
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uint8_t RegisterHandlerB::Read(uint32_t addr)
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{
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addr &= 0xFFFF;
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if(addr >= 0x2140 && addr <= 0x217F) {
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return _spc->CpuReadRegister(addr & 0x03);
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} else if(addr == 0x2180) {
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uint8_t value = _workRam[_wramPosition];
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_console->ProcessWorkRamRead(_wramPosition, value);
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_console->GetCheatManager()->ApplyCheat(0x7E0000 | _wramPosition, value);
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_wramPosition = (_wramPosition + 1) & 0x1FFFF;
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return value;
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} else if(addr >= 0x2300 && addr <= 0x23FF && _console->GetCartridge()->GetSa1()) {
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return _console->GetCartridge()->GetSa1()->CpuRegisterRead(addr);
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} else if(_msu1 && addr <= 0x2007) {
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return _msu1->Read(addr);
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} else {
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return _ppu->Read(addr);
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}
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}
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uint8_t RegisterHandlerB::Peek(uint32_t addr)
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{
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//Avoid side effects for now
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return 0;
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}
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void RegisterHandlerB::PeekBlock(uint32_t addr, uint8_t *output)
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{
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//Avoid side effects for now
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memset(output, 0, 0x1000);
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}
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void RegisterHandlerB::Write(uint32_t addr, uint8_t value)
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{
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addr &= 0xFFFF;
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if(addr >= 0x2140 && addr <= 0x217F) {
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return _spc->CpuWriteRegister(addr & 0x03, value);
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} if(addr >= 0x2180 && addr <= 0x2183) {
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switch(addr & 0xFFFF) {
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case 0x2180:
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_console->ProcessWorkRamWrite(_wramPosition, value);
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_workRam[_wramPosition] = value;
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_wramPosition = (_wramPosition + 1) & 0x1FFFF;
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break;
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case 0x2181: _wramPosition = (_wramPosition & 0x1FF00) | value; break;
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case 0x2182: _wramPosition = (_wramPosition & 0x100FF) | (value << 8); break;
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case 0x2183: _wramPosition = (_wramPosition & 0xFFFF) | ((value & 0x01) << 16); break;
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}
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} else if(addr >= 0x2200 && addr <= 0x22FF && _console->GetCartridge()->GetSa1()) {
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_console->GetCartridge()->GetSa1()->CpuRegisterWrite(addr, value);
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} else if(_msu1 && addr <= 0x2007) {
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return _msu1->Write(addr, value);
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} else {
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_ppu->Write(addr, value);
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}
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}
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AddressInfo RegisterHandlerB::GetAbsoluteAddress(uint32_t address)
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{
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return { -1, SnesMemoryType::CpuMemory };
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}
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void RegisterHandlerB::Serialize(Serializer &s)
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{
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s.Stream(_wramPosition);
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}
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