OXYGENHUB
◆ main openmsx / src / memory / RomArc.cc
1.1 KiB · C++ · last changed chore(): initial commit 1 month ago source blame history raw
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// Parallax' Arc
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#include "RomArc.hh"
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#include "MSXCPUInterface.hh"
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#include "serialize.hh"
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namespace openmsx {
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RomArc::RomArc(const DeviceConfig& config, Rom&& rom_)
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	: Rom16kBBlocks(config, std::move(rom_))
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{
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	setUnmapped(0);
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	setRom(1, 0);
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	setRom(2, 1);
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	setUnmapped(3);
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	reset(EmuTime::dummy());
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	getCPUInterface().register_IO_InOut(0x7f, this);
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}
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RomArc::~RomArc()
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{
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	getCPUInterface().unregister_IO_InOut(0x7f, this);
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}
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void RomArc::reset(EmuTime /*time*/)
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{
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	offset = 0x00;
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}
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void RomArc::writeIO(uint16_t /*port*/, byte value, EmuTime /*time*/)
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{
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	if (value == 0x35) {
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		++offset;
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	}
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}
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byte RomArc::readIO(uint16_t port, EmuTime time)
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{
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	return RomArc::peekIO(port, time);
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}
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byte RomArc::peekIO(uint16_t /*port*/, EmuTime /*time*/) const
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{
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	return ((offset & 0x03) == 0x03) ? 0xda : 0xff;
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}
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template<typename Archive>
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void RomArc::serialize(Archive& ar, unsigned /*version*/)
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{
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	ar.template serializeBase<Rom16kBBlocks>(*this);
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	ar.serialize("offset", offset);
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}
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INSTANTIATE_SERIALIZE_METHODS(RomArc);
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REGISTER_MSXDEVICE(RomArc, "RomArc");
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} // namespace openmsx