// license:BSD-3-Clause // copyright-holders:Wilbert Pol #include "emu.h" #include "matra.h" namespace { class msx_cart_matra_comp_device : public device_t, public msx_cart_interface { public: msx_cart_matra_comp_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, MSX_CART_MATRA_COMP, tag, owner, clock) , msx_cart_interface(mconfig, *this) , m_rombank(*this, "rombank%u", 0U) , m_bank_mask(0) , m_banking_enabled(true) { } virtual std::error_condition initialize_cartridge(std::string &message) override; protected: // device_t implementation virtual void device_start() override ATTR_COLD; virtual void device_reset() override ATTR_COLD; private: template void bank_w(u8 data); void disable_banking_w(u8 data); memory_bank_array_creator<4> m_rombank; u8 m_bank_mask; bool m_banking_enabled; }; void msx_cart_matra_comp_device::device_start() { save_item(NAME(m_banking_enabled)); } void msx_cart_matra_comp_device::device_reset() { for (int i = 0; i < 4; i++) m_rombank[i]->set_entry(i); m_banking_enabled = true; } std::error_condition msx_cart_matra_comp_device::initialize_cartridge(std::string &message) { if (!cart_rom_region()) { message = "msx_cart_matra_comp_device: Required region 'rom' was not found."; return image_error::INTERNAL; } const u32 size = cart_rom_region()->bytes(); const u16 banks = size / 0x2000; if (size > 256 * 0x2000 || size < 0x8000 || size != banks * 0x2000 || (~(banks - 1) % banks)) { message = "msx_cart_matra_comp_device: Region 'rom' has unsupported size."; return image_error::INVALIDLENGTH; } m_bank_mask = banks - 1; for (int i = 0; i < 4; i++) m_rombank[i]->configure_entries(0, banks, cart_rom_region()->base(), 0x2000); page(1)->install_read_bank(0x4000, 0x5fff, m_rombank[0]); page(1)->install_write_handler(0x5000, 0x5000, emu::rw_delegate(*this, FUNC(msx_cart_matra_comp_device::bank_w<0>))); page(1)->install_read_bank(0x6000, 0x7fff, m_rombank[1]); page(1)->install_write_handler(0x6000, 0x6000, emu::rw_delegate(*this, FUNC(msx_cart_matra_comp_device::bank_w<1>))); page(2)->install_read_bank(0x8000, 0x9fff, m_rombank[2]); page(2)->install_write_handler(0x8000, 0x8000, emu::rw_delegate(*this, FUNC(msx_cart_matra_comp_device::bank_w<2>))); page(2)->install_read_bank(0xa000, 0xbfff, m_rombank[3]); page(2)->install_write_handler(0xa000, 0xa000, emu::rw_delegate(*this, FUNC(msx_cart_matra_comp_device::bank_w<3>))); page(2)->install_write_handler(0xba00, 0xba00, emu::rw_delegate(*this, FUNC(msx_cart_matra_comp_device::disable_banking_w))); return std::error_condition(); } template void msx_cart_matra_comp_device::bank_w(u8 data) { if (m_banking_enabled) m_rombank[Bank]->set_entry(data & m_bank_mask); } void msx_cart_matra_comp_device::disable_banking_w(u8 data) { // Assuming that any write here disables banking m_banking_enabled = false; } } // anonymous namespace DEFINE_DEVICE_TYPE_PRIVATE(MSX_CART_MATRA_COMP, msx_cart_interface, msx_cart_matra_comp_device, "msx_cart_matra_comp", "MSX Cartridge - Matra Compilation")