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◆ main openmsx / src / memory / PanasonicRam.cc
1.5 KiB · C++ · last changed chore(): initial commit 1 month ago source blame history raw
e8555c89 Andy McCall 1 
#include "PanasonicRam.hh"
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#include "PanasonicMemory.hh"
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#include "MSXMotherBoard.hh"
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#include "serialize.hh"
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namespace openmsx {
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PanasonicRam::PanasonicRam(const DeviceConfig& config)
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	: MSXMemoryMapperBase(config)
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	, panasonicMemory(getMotherBoard().getPanasonicMemory())
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{
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	panasonicMemory.registerRam(checkedRam.getUncheckedRam());
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}
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void PanasonicRam::writeMem(uint16_t address, byte value, EmuTime /*time*/)
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{
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	unsigned addr = calcAddress(address);
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	if (panasonicMemory.isWritable(addr)) {
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		checkedRam.write(addr, value);
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	}
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}
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byte* PanasonicRam::getWriteCacheLine(uint16_t start)
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{
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	unsigned addr = calcAddress(start);
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	if (panasonicMemory.isWritable(addr)) {
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		return checkedRam.getWriteCacheLine(addr);
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	} else {
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		return unmappedWrite.data();
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	}
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}
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void PanasonicRam::writeIO(uint16_t port, byte value, EmuTime time)
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{
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	MSXMemoryMapperBase::writeIOImpl(port, value, time);
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	byte page = port & 3;
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	unsigned addr = segmentOffset(page);
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	if (byte* data = checkedRam.getRWCacheLines(addr, 0x4000)) {
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		const byte* rData = data;
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		byte* wData = panasonicMemory.isWritable(addr) ? data : unmappedWrite.data();
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		fillDeviceRWCache(page * 0x4000, 0x4000, rData, wData);
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	} else {
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		invalidateDeviceRWCache(page * 0x4000, 0x4000);
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	}
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}
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template<typename Archive>
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void PanasonicRam::serialize(Archive& ar, unsigned /*version*/)
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{
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	ar.template serializeBase<MSXMemoryMapperBase>(*this);
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}
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INSTANTIATE_SERIALIZE_METHODS(PanasonicRam);
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REGISTER_MSXDEVICE(PanasonicRam, "PanasonicRam");
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} // namespace openmsx