OXYGENHUB
◆ main openmsx / src / memory / RomHarryFox.cc
1.1 KiB · C++ · last changed chore(): initial commit 1 month ago source blame history raw
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// This mapper is used for the game "Harry Fox Yki no Maoh"
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/** Thanks to enen for testing this on a real cartridge:
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 *
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 * Writing to 0x6xxx, 0 or 1, will switch bank 0 or 2 into 0x4000-0x7fff
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 * Writing to 0x7xxx, 0 or 1, will switch bank 1 or 3 into 0x8000-0xbfff
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 * 0x0000-0x3fff and 0xc000-0xffff are unmapped (read as 0xff)
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 */
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#include "RomHarryFox.hh"
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#include "serialize.hh"
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namespace openmsx {
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RomHarryFox::RomHarryFox(const DeviceConfig& config, Rom&& rom_)
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	: Rom16kBBlocks(config, std::move(rom_))
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{
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	reset(EmuTime::dummy());
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}
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void RomHarryFox::reset(EmuTime /*time*/)
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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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}
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void RomHarryFox::writeMem(uint16_t address, byte value, EmuTime /*time*/)
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{
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	if        ((0x6000 <= address) && (address < 0x7000)) {
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		setRom(1, 2 * (value & 1) + 0);
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	} else if ((0x7000 <= address) && (address < 0x8000)) {
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		setRom(2, 2 * (value & 1) + 1);
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	}
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}
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byte* RomHarryFox::getWriteCacheLine(uint16_t address)
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{
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	if ((0x6000 <= address) && (address < 0x8000)) {
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		return nullptr;
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	} else {
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		return unmappedWrite.data();
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	}
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}
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REGISTER_MSXDEVICE(RomHarryFox, "RomHarryFox");
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} // namespace openmsx