// license:BSD-3-Clause // copyright-holders:Wilbert Pol #include "emu.h" #include "superloderunner.h" DEFINE_DEVICE_TYPE(MSX_CART_SUPERLODERUNNER, msx_cart_superloderunner_device, "msx_cart_superloderunner", "MSX Cartridge - Super Lode Runner") msx_cart_superloderunner_device::msx_cart_superloderunner_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, MSX_CART_SUPERLODERUNNER, tag, owner, clock) , msx_cart_interface(mconfig, *this) , m_selected_bank(0) , m_bank_base(nullptr) { } void msx_cart_superloderunner_device::device_start() { save_item(NAME(m_selected_bank)); machine().save().register_postload(save_prepost_delegate(FUNC(msx_cart_superloderunner_device::restore_banks), this)); // Install evil memory write handler address_space &space = machine().device("maincpu")->space(AS_PROGRAM); space.install_write_handler(0x0000, 0x0000, write8_delegate(FUNC(msx_cart_superloderunner_device::banking), this)); } void msx_cart_superloderunner_device::restore_banks() { m_bank_base = get_rom_base() + (m_selected_bank & 0x0f) * 0x4000; } void msx_cart_superloderunner_device::initialize_cartridge() { if (get_rom_size() != 0x20000) { fatalerror("superloderunner: Invalid ROM size\n"); } restore_banks(); } READ8_MEMBER(msx_cart_superloderunner_device::read_cart) { if (offset >= 0x8000 && offset < 0xc000) { return m_bank_base[offset & 0x3fff]; } return 0xff; } WRITE8_MEMBER(msx_cart_superloderunner_device::banking) { m_selected_bank = data; restore_banks(); }