OXYGENHUB
◆ main openmsx / src / memory / RomMSXWrite.cc
1.1 KiB · C++ · last changed chore(): initial commit 1 month ago source blame history raw
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// Japanese MSX Write (1)
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// Identical to ASCII 16kB cartridges, but with 2 extra switch addresses:
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// 0x6FFF and 0x7FFF
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#include "RomMSXWrite.hh"
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#include "CacheLine.hh"
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#include "one_of.hh"
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#include "serialize.hh"
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namespace openmsx {
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RomMSXWrite::RomMSXWrite(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 RomMSXWrite::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, 0);
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	setUnmapped(3);
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}
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void RomMSXWrite::writeMem(uint16_t address, byte value, EmuTime /*time*/)
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{
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	if (((0x6000 <= address) && (address < 0x7800) && !(address & 0x0800)) ||
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	    (address == one_of(0x6FFF, 0x7FFF))) {
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		byte region = ((address >> 12) & 1) + 1;
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		setRom(region, value);
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	}
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}
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byte* RomMSXWrite::getWriteCacheLine(uint16_t address)
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{
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	if (((0x6000 <= address) && (address < 0x7800) && !(address & 0x0800)) ||
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	    (address == one_of(0x6FFF & CacheLine::HIGH, 0x7FFF & CacheLine::HIGH))) {
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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(RomMSXWrite, "RomMSXWrite");
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} // namespace openmsx