RomPageNN.cc

Go to the documentation of this file.

#include "RomPageNN.hh"
#include "serialize.hh"
#include "unreachable.hh"
#include "xrange.hh"
 
namespace openmsx {
 
RomPageNN::RomPageNN(const DeviceConfig& config, Rom&& rom_, RomType type)
        : Rom8kBBlocks(config, std::move(rom_))
{
        const auto pages = [&] {
                switch (type) {
                        case ROM_PAGE0:    return 0b0001;
                        case ROM_PAGE1:    return 0b0010;
                        case ROM_PAGE01:   return 0x0011;
                        case ROM_PAGE2:    return 0b0100;
                        case ROM_PAGE12:   return 0b0110;
                        case ROM_PAGE012:  return 0b0111;
                        case ROM_PAGE3:    return 0b1000;
                        case ROM_PAGE23:   return 0b1100;
                        case ROM_PAGE123:  return 0b1110;
                        case ROM_PAGE0123: return 0b1111;
                        default: UNREACHABLE;
                }
        }();
        int bank = 0;
        for (auto page : xrange(4)) {
                if (pages & (1 << page)) {
                        setRom(page * 2 + 0, bank++);
                        setRom(page * 2 + 1, bank++);
                } else {
                        setUnmapped(page * 2 + 0);
                        setUnmapped(page * 2 + 1);
                }
        }
}
 
REGISTER_MSXDEVICE(RomPageNN, "RomPageNN");
 
} // namespace openmsx