// license:BSD-3-Clause // copyright-holders:Wilbert Pol #include "emu.h" #include "dooly.h" namespace { class msx_cart_dooly_device : public device_t, public msx_cart_interface { public: msx_cart_dooly_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) : device_t(mconfig, MSX_CART_DOOLY, tag, owner, clock) , msx_cart_interface(mconfig, *this) , m_rombank(*this, "bank%u", 0U) { } virtual std::error_condition initialize_cartridge(std::string &message) override; protected: // device_t implementation virtual void device_start() override { } virtual void device_reset() override ATTR_COLD; private: void prot_w(u8 data); u8 mode4_page1_r(offs_t offset); u8 mode4_page2_r(offs_t offset); std::unique_ptr m_bitswapped; memory_bank_array_creator<2> m_rombank; }; void msx_cart_dooly_device::device_reset() { m_rombank[0]->set_entry(0); m_rombank[1]->set_entry(0); } std::error_condition msx_cart_dooly_device::initialize_cartridge(std::string &message) { if (!cart_rom_region()) { message = "msx_cart_dooly_device: Required region 'rom' was not found."; return image_error::INTERNAL; } if (cart_rom_region()->bytes() != 0x8000) { message = "msx_cart_dooly_device: Region 'rom' has unsupported size."; return image_error::INVALIDLENGTH; } m_bitswapped = std::make_unique(0x8000); for (int i = 0; i < 0x8000; i++) m_bitswapped[i] = bitswap<8>(cart_rom_region()->base()[i], 7, 6, 5, 4, 3, 1, 0, 2); m_rombank[0]->configure_entry(0, cart_rom_region()->base()); m_rombank[0]->configure_entry(1, m_bitswapped.get()); m_rombank[1]->configure_entry(0, cart_rom_region()->base() + 0x4000); m_rombank[1]->configure_entry(1, m_bitswapped.get() + 0x4000); page(1)->install_read_bank(0x4000, 0x7fff, m_rombank[0]); page(1)->install_write_handler(0x4000, 0x7fff, emu::rw_delegate(*this, FUNC(msx_cart_dooly_device::prot_w))); page(2)->install_read_bank(0x8000, 0xbfff, m_rombank[1]); page(2)->install_write_handler(0x8000, 0xbfff, emu::rw_delegate(*this, FUNC(msx_cart_dooly_device::prot_w))); return std::error_condition(); } void msx_cart_dooly_device::prot_w(u8 data) { data &= 0x07; m_rombank[0]->set_entry(BIT(data, 2) ? 1 : 0); m_rombank[1]->set_entry(BIT(data, 2) ? 1 : 0); if (data != 0 && data != 4) { logerror("msx_cart_dooly_device: unhandled protection mode %02x\n", data); } } } // anonymous namespace DEFINE_DEVICE_TYPE_PRIVATE(MSX_CART_DOOLY, msx_cart_interface, msx_cart_dooly_device, "msx_cart_dooly", "MSX Cartridge - Dooly")