// license:BSD-3-Clause // copyright-holders:Wilbert Pol #include "emu.h" #include "crossblaim.h" namespace { class msx_cart_crossblaim_device : public device_t, public msx_cart_interface { public: msx_cart_crossblaim_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, MSX_CART_CROSSBLAIM, tag, owner, clock) , msx_cart_interface(mconfig, *this) , m_rombank(*this, "rombank") { } virtual std::error_condition initialize_cartridge(std::string &message) override; protected: // device_t implementation virtual void device_start() override { } private: void mapper_write(u8 data); memory_bank_creator m_rombank; }; std::error_condition msx_cart_crossblaim_device::initialize_cartridge(std::string &message) { if (!cart_rom_region()) { message = "msx_cart_crossblaim_device: Required region 'rom' was not found."; return image_error::INTERNAL; } if (cart_rom_region()->bytes() != 0x10000) { message = "msx_cart_crossblaim_device: Region 'rom' has unsupported size."; return image_error::INVALIDLENGTH; } m_rombank->configure_entries(0, 4, cart_rom_region()->base(), 0x4000); page(1)->install_rom(0x4000, 0x7fff, cart_rom_region()->base()); page(1)->install_write_handler(0x4045, 0x4045, emu::rw_delegate(*this, FUNC(msx_cart_crossblaim_device::mapper_write))); page(2)->install_read_bank(0x8000, 0xbfff, m_rombank); return std::error_condition(); } void msx_cart_crossblaim_device::mapper_write(u8 data) { data &= 0x03; if (!data) data = 1; m_rombank->set_entry(data); } } // anonymous namespace DEFINE_DEVICE_TYPE_PRIVATE(MSX_CART_CROSSBLAIM, msx_cart_interface, msx_cart_crossblaim_device, "msx_cart_crossblaim", "MSX Cartridge Cross Blaim")