// license:BSD-3-Clause // copyright-holders:Wilbert Pol #include "emu.h" #include "ascii.h" namespace { class msx_cart_ascii8_device : public device_t, public msx_cart_interface { public: msx_cart_ascii8_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) : device_t(mconfig, MSX_CART_ASCII8, tag, owner, clock) , msx_cart_interface(mconfig, *this) , m_rombank(*this, "rombank%u", 0U) , m_bank_mask(0) { } 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: static constexpr size_t BANK_SIZE = 0x2000; template void bank_w(u8 data); memory_bank_array_creator<4> m_rombank; u8 m_bank_mask; }; void msx_cart_ascii8_device::device_reset() { for (int i = 0; i < 4; i++) m_rombank[i]->set_entry(0); } std::error_condition msx_cart_ascii8_device::initialize_cartridge(std::string &message) { if (!cart_rom_region()) { message = "msx_cart_ascii8_device: Required region 'rom' was not found."; return image_error::INTERNAL; } const u32 size = cart_rom_region()->bytes(); const u16 banks = size / BANK_SIZE; if (size > 256 * BANK_SIZE || size != banks * BANK_SIZE || (~(banks - 1) % banks)) { message = "msx_cart_ascii8_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(), BANK_SIZE); page(1)->install_read_bank(0x4000, 0x5fff, m_rombank[0]); page(1)->install_read_bank(0x6000, 0x7fff, m_rombank[1]); page(1)->install_write_handler(0x6000, 0x67ff, emu::rw_delegate(*this, FUNC(msx_cart_ascii8_device::bank_w<0>))); page(1)->install_write_handler(0x6800, 0x6fff, emu::rw_delegate(*this, FUNC(msx_cart_ascii8_device::bank_w<1>))); page(1)->install_write_handler(0x7000, 0x77ff, emu::rw_delegate(*this, FUNC(msx_cart_ascii8_device::bank_w<2>))); page(1)->install_write_handler(0x7800, 0x7fff, emu::rw_delegate(*this, FUNC(msx_cart_ascii8_device::bank_w<3>))); page(2)->install_read_bank(0x8000, 0x9fff, m_rombank[2]); page(2)->install_read_bank(0xa000, 0xbfff, m_rombank[3]); return std::error_condition(); } template void msx_cart_ascii8_device::bank_w(u8 data) { m_rombank[Bank]->set_entry(data & m_bank_mask); } class msx_cart_ascii16_device : public device_t, public msx_cart_interface { public: msx_cart_ascii16_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) : device_t(mconfig, MSX_CART_ASCII16, tag, owner, clock) , msx_cart_interface(mconfig, *this) , m_rombank(*this, "rombank%u", 0U) , m_bank_mask(0) { } 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: static constexpr size_t BANK_SIZE = 0x4000; template void bank_w(u8 data); memory_bank_array_creator<2> m_rombank; u8 m_bank_mask; }; void msx_cart_ascii16_device::device_reset() { m_rombank[0]->set_entry(0); m_rombank[1]->set_entry(0); } std::error_condition msx_cart_ascii16_device::initialize_cartridge(std::string &message) { if (!cart_rom_region()) { message = "msx_cart_ascii16_device: Required region 'rom' was not found."; return image_error::INTERNAL; } const u32 size = cart_rom_region()->bytes(); const u16 banks = size / BANK_SIZE; if (size > 256 * BANK_SIZE || size != banks * BANK_SIZE || (~(banks - 1) % banks)) { message = "msx_cart_ascii16_device: Region 'rom' has unsupported size."; return image_error::INVALIDLENGTH; } m_bank_mask = banks - 1; for (int i = 0; i < 2; i++) m_rombank[i]->configure_entries(0, banks, cart_rom_region()->base(), BANK_SIZE); page(1)->install_read_bank(0x4000, 0x7fff, m_rombank[0]); page(1)->install_write_handler(0x6000, 0x67ff, emu::rw_delegate(*this, FUNC(msx_cart_ascii16_device::bank_w<0>))); page(1)->install_write_handler(0x7000, 0x77ff, emu::rw_delegate(*this, FUNC(msx_cart_ascii16_device::bank_w<1>))); page(2)->install_read_bank(0x8000, 0xbfff, m_rombank[1]); return std::error_condition(); } template void msx_cart_ascii16_device::bank_w(u8 data) { m_rombank[Bank]->set_entry(data & m_bank_mask); } class msx_cart_ascii8_sram_device : public device_t, public msx_cart_interface { public: msx_cart_ascii8_sram_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) : device_t(mconfig, MSX_CART_ASCII8_SRAM, tag, owner, clock) , msx_cart_interface(mconfig, *this) , m_rombank(*this, "rombank%u", 0U) , m_view{ {*this, "view2"}, {*this, "view3"} } , m_bank_mask(0) , m_sram_select_mask(0) { } 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: static constexpr size_t BANK_SIZE = 0x2000; void mapper_write(offs_t offset, u8 data); memory_bank_array_creator<4> m_rombank; memory_view m_view[2]; u8 m_bank_mask; u8 m_sram_select_mask; }; void msx_cart_ascii8_sram_device::device_reset() { for (int i = 0; i < 4; i++) m_rombank[i]->set_entry(0); m_view[0].select(0); m_view[1].select(0); } std::error_condition msx_cart_ascii8_sram_device::initialize_cartridge(std::string &message) { if (!cart_rom_region()) { message = "msx_cart_ascii8_sram_device: Required region 'rom' was not found."; return image_error::INTERNAL; } if (!cart_sram_region()) { message = "msx_cart_ascii8_sram_device: Required region 'sram' was not found."; return image_error::INTERNAL; } const u32 size = cart_rom_region()->bytes(); const u16 banks = size / BANK_SIZE; if (size > 128 * BANK_SIZE || size != banks * BANK_SIZE || (~(banks - 1) % banks)) { message = "msx_cart_ascii8_sram_device: Region 'rom' has unsupported size."; return image_error::INVALIDLENGTH; } if (cart_sram_region()->bytes() < 0x2000) { message = "msx_cart_ascii8_sram_device: Region 'sram' has unsupported size."; return image_error::BADSOFTWARE; } m_bank_mask = banks - 1; m_sram_select_mask = banks; for (int i = 0; i < 4; i++) m_rombank[i]->configure_entries(0, banks, cart_rom_region()->base(), BANK_SIZE); page(1)->install_read_bank(0x4000, 0x5fff, m_rombank[0]); page(1)->install_read_bank(0x6000, 0x7fff, m_rombank[1]); page(1)->install_write_handler(0x6000, 0x7fff, emu::rw_delegate(*this, FUNC(msx_cart_ascii8_sram_device::mapper_write))); page(2)->install_view(0x8000, 0x9fff, m_view[0]); m_view[0][0].install_read_bank(0x8000, 0x9fff, m_rombank[2]); m_view[0][1].install_ram(0x8000, 0x9fff, cart_sram_region()->base()); page(2)->install_view(0xa000, 0xbfff, m_view[1]); m_view[1][0].install_read_bank(0xa000, 0xbfff, m_rombank[3]); m_view[1][1].install_ram(0xa000, 0xbfff, cart_sram_region()->base()); return std::error_condition(); } void msx_cart_ascii8_sram_device::mapper_write(offs_t offset, u8 data) { u8 bank = (offset / 0x800) & 0x03; if (data & m_sram_select_mask) { if (BIT(bank, 1)) m_view[BIT(bank, 0)].select(1); } else { if (BIT(bank, 1)) m_view[BIT(bank, 0)].select(0); m_rombank[bank]->set_entry(data & m_bank_mask); } } class msx_cart_ascii16_sram_device : public device_t, public msx_cart_interface { public: msx_cart_ascii16_sram_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, MSX_CART_ASCII16_SRAM, tag, owner, clock) , msx_cart_interface(mconfig, *this) , m_rombank(*this, "rombank%u", 0U) , m_view(*this, "view") , m_bank_mask(0) , m_sram_select_mask(0) { } 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: static constexpr size_t BANK_SIZE = 0x4000; void mapper_write_6000(u8 data); void mapper_write_7000(u8 data); memory_bank_array_creator<2> m_rombank; memory_view m_view; u8 m_bank_mask; u8 m_sram_select_mask; }; void msx_cart_ascii16_sram_device::device_reset() { m_rombank[0]->set_entry(0); m_view.select(0); m_rombank[1]->set_entry(0); } std::error_condition msx_cart_ascii16_sram_device::initialize_cartridge(std::string &message) { if (!cart_rom_region()) { message = "msx_cart_ascii16_sram_device: Required region 'rom' was not found."; return image_error::INTERNAL; } if (!cart_sram_region()) { message = "msx_cart_ascii16_sram_device: Required region 'sram' was not found."; return image_error::INTERNAL; } const u32 size = cart_rom_region()->bytes(); const u16 banks = size / BANK_SIZE; if (size > 128 * BANK_SIZE || size != banks * BANK_SIZE || (~(banks - 1) % banks)) { message = "msx_cart_ascii16_sram_device: Region 'rom' has unsupported size."; return image_error::INVALIDLENGTH; } if (cart_sram_region()->bytes() < 0x800) { message = "msx_cart_ascii16_sram_device: Region 'sram' has unsupported size."; return image_error::BADSOFTWARE; } m_bank_mask = banks - 1; m_sram_select_mask = banks; for (int i = 0; i < 2; i++) m_rombank[i]->configure_entries(0, banks, cart_rom_region()->base(), BANK_SIZE); page(1)->install_read_bank(0x4000, 0x7fff, m_rombank[0]); page(1)->install_write_handler(0x6000, 0x67ff, emu::rw_delegate(*this, FUNC(msx_cart_ascii16_sram_device::mapper_write_6000))); page(1)->install_write_handler(0x7000, 0x77ff, emu::rw_delegate(*this, FUNC(msx_cart_ascii16_sram_device::mapper_write_7000))); page(2)->install_view(0x8000, 0xbfff, m_view); m_view[0].install_read_bank(0x8000, 0xbfff, m_rombank[1]); m_view[1].install_ram(0x8000, 0x87ff, 0x3800, cart_sram_region()->base()); return std::error_condition(); } void msx_cart_ascii16_sram_device::mapper_write_6000(u8 data) { m_rombank[0]->set_entry(data & m_bank_mask); } void msx_cart_ascii16_sram_device::mapper_write_7000(u8 data) { if (data & m_sram_select_mask) { m_view.select(1); } else { m_view.select(0); m_rombank[1]->set_entry(data & m_bank_mask); } } } // anonymous namespace DEFINE_DEVICE_TYPE_PRIVATE(MSX_CART_ASCII8, msx_cart_interface, msx_cart_ascii8_device, "msx_cart_ascii8", "MSX Cartridge - ASCII8") DEFINE_DEVICE_TYPE_PRIVATE(MSX_CART_ASCII16, msx_cart_interface, msx_cart_ascii16_device, "msx_cart_ascii16", "MSX Cartridge - ASCII16") DEFINE_DEVICE_TYPE_PRIVATE(MSX_CART_ASCII8_SRAM, msx_cart_interface, msx_cart_ascii8_sram_device, "msx_cart_ascii8_sram", "MSX Cartridge - ASCII8 w/SRAM") DEFINE_DEVICE_TYPE_PRIVATE(MSX_CART_ASCII16_SRAM, msx_cart_interface, msx_cart_ascii16_sram_device, "msx_cart_ascii16_sram", "MSX Cartridge - ASCII16 w/SRAM")