RomHolyQuran.cc

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// Holy Qu'ran  cartridge
//  It is like an ASCII 8KB, but using the 5000h, 5400h, 5800h and 5C00h
//  addresses.
 
#include "RomHolyQuran.hh"
#include "serialize.hh"
#include "xrange.hh"
 
namespace openmsx {
 
RomHolyQuran::RomHolyQuran(const DeviceConfig& config, Rom&& rom_)
        : Rom8kBBlocks(config, std::move(rom_))
{
        reset(EmuTime::dummy());
}
 
void RomHolyQuran::reset(EmuTime::param /*time*/)
{
        setUnmapped(0);
        setUnmapped(1);
        for (auto i : xrange(2, 6)) {
                setRom(i, 0);
        }
        setUnmapped(6);
        setUnmapped(7);
}
 
void RomHolyQuran::writeMem(word address, byte value, EmuTime::param /*time*/)
{
        // TODO are switch addresses mirrored?
        if ((0x5000 <= address) && (address < 0x6000)) {
                byte region = ((address >> 10) & 3) + 2;
                setRom(region, value);
        }
}
 
byte* RomHolyQuran::getWriteCacheLine(word address)
{
        if ((0x5000 <= address) && (address < 0x6000)) {
                return nullptr;
        } else {
                return unmappedWrite.data();
        }
}
 
REGISTER_MSXDEVICE(RomHolyQuran, "RomHolyQuran");
 
} // namespace openmsx