RomMSXWrite.cc

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// Japanese MSX Write (1)
// Identical to ASCII 16kB cartridges, but with 2 extra switch addresses:
// 0x6FFF and 0x7FFF
 
#include "RomMSXWrite.hh"
#include "CacheLine.hh"
#include "one_of.hh"
#include "serialize.hh"
 
namespace openmsx {
 
RomMSXWrite::RomMSXWrite(const DeviceConfig& config, Rom&& rom_)
        : Rom16kBBlocks(config, std::move(rom_))
{
        reset(EmuTime::dummy());
}
 
void RomMSXWrite::reset(EmuTime::param /*time*/)
{
        setUnmapped(0);
        setRom(1, 0);
        setRom(2, 0);
        setUnmapped(3);
}
 
void RomMSXWrite::writeMem(word address, byte value, EmuTime::param /*time*/)
{
        if (((0x6000 <= address) && (address < 0x7800) && !(address & 0x0800)) ||
            (address == one_of(0x6FFF, 0x7FFF))) {
                byte region = ((address >> 12) & 1) + 1;
                setRom(region, value);
        }
}
 
byte* RomMSXWrite::getWriteCacheLine(word address) const
{
        if (((0x6000 <= address) && (address < 0x7800) && !(address & 0x0800)) ||
            (address == one_of(0x6FFF & CacheLine::HIGH, 0x7FFF & CacheLine::HIGH))) {
                return nullptr;
        } else {
                return unmappedWrite.data();
        }
}
 
REGISTER_MSXDEVICE(RomMSXWrite, "RomMSXWrite");
 
} // namespace openmsx