// license:BSD-3-Clause // copyright-holders:Fabio Priuli /*********************************************************************************************************** M5 cart emulation (through slot devices) ***********************************************************************************************************/ #include "emu.h" #include "slot.h" //************************************************************************** // GLOBAL VARIABLES //************************************************************************** DEFINE_DEVICE_TYPE(M5_CART_SLOT, m5_cart_slot_device, "m5_cart_slot", "M5 Cartridge Slot") //************************************************************************** // M5 Cartridges Interface //************************************************************************** //------------------------------------------------- // device_m5_cart_interface - constructor //------------------------------------------------- device_m5_cart_interface::device_m5_cart_interface(const machine_config &mconfig, device_t &device) : device_interface(device, "m5cart"), m_rom(nullptr), m_rom_size(0) { } //------------------------------------------------- // ~device_m5_cart_interface - destructor //------------------------------------------------- device_m5_cart_interface::~device_m5_cart_interface() { } //------------------------------------------------- // rom_alloc - alloc the space for the cart //------------------------------------------------- void device_m5_cart_interface::rom_alloc(uint32_t size) { if (m_rom == nullptr) { m_rom = device().machine().memory().region_alloc(device().subtag("rom"), size, 1, ENDIANNESS_LITTLE)->base(); m_rom_size = size; } } //------------------------------------------------- // ram_alloc - alloc the space for the ram //------------------------------------------------- void device_m5_cart_interface::ram_alloc(uint32_t size) { m_ram.resize(size); } //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // m5_cart_slot_device - constructor //------------------------------------------------- m5_cart_slot_device::m5_cart_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, M5_CART_SLOT, tag, owner, clock), device_cartrom_image_interface(mconfig, *this), device_single_card_slot_interface(mconfig, *this), m_type(M5_STD), m_cart(nullptr) { } //------------------------------------------------- // m5_cart_slot_device - destructor //------------------------------------------------- m5_cart_slot_device::~m5_cart_slot_device() { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void m5_cart_slot_device::device_start() { m_cart = get_card_device(); } //------------------------------------------------- // M5 PCB //------------------------------------------------- struct m5_slot { int pcb_id; const char *slot_option; }; // Here, we take the feature attribute from .xml (i.e. the PCB name) and we assign a unique ID to it static const m5_slot slot_list[] = { {EM_5,"em_5"}, {MEM64KBI,"64kbi"}, {MEM64KBF,"64kbf"}, {MEM64KRX,"64krx"} }; static int m5_get_pcb_id(const char *slot) { for (int i = 0; i < std::size(slot_list); i++) { if (!strcmp(slot_list[i].slot_option, slot)) return slot_list[i].pcb_id; } return 0; } static const char *m5_get_slot(int type) { for (int i = 0; i < std::size(slot_list); i++) { if (slot_list[i].pcb_id == type) return slot_list[i].slot_option; } return "std"; } /*------------------------------------------------- call load -------------------------------------------------*/ std::pair m5_cart_slot_device::call_load() { if (m_cart) { m_type=M5_STD; if (loaded_through_softlist()) { const char *pcb_name = get_feature("slot"); if (pcb_name) //is it ram cart? m_type = m5_get_pcb_id(full_software_name().c_str()); else m_type=M5_STD; //standard cart(no feature line in xml) } uint32_t size = !loaded_through_softlist() ? length() : get_software_region_length("rom"); if (size > 0x5000 && m_type == M5_STD) return std::make_pair(image_error::INVALIDLENGTH, "Image file exceeds the expected size for an M5 cart (20K)"); if (m_type == M5_STD || m_type>2) //carts with roms { if (loaded_through_softlist()) { m_cart->set_rom_base(get_software_region("rom")); m_cart->set_rom_size(size); } else { m_cart->rom_alloc(size); fread(m_cart->get_rom_base(), size); } } if (loaded_through_softlist()) //even rom cart can have ram if (get_software_region("ram")) m_cart->ram_alloc(get_software_region_length("ram")); //printf("Type: %s\n", m5_get_slot(m_type)); } return std::make_pair(std::error_condition(), std::string()); } /*------------------------------------------------- get default card software -------------------------------------------------*/ std::string m5_cart_slot_device::get_default_card_software(get_default_card_software_hook &hook) const { std::string result; if (hook.image_file()) { const char *slot_string = "std"; //uint32_t size = core_fsize(m_file); int type = M5_STD; slot_string = m5_get_slot(type); //printf("type: %s\n", slot_string); result.assign(slot_string); return result; } return software_get_default_slot("std"); } /*------------------------------------------------- read -------------------------------------------------*/ uint8_t m5_cart_slot_device::read_rom(offs_t offset) { if (m_cart) return m_cart->read_rom(offset); else return 0xff; } /*------------------------------------------------- read -------------------------------------------------*/ uint8_t m5_cart_slot_device::read_ram(offs_t offset) { if (m_cart) return m_cart->read_ram(offset); else return 0xff; } /*------------------------------------------------- write -------------------------------------------------*/ void m5_cart_slot_device::write_ram(offs_t offset, uint8_t data) { if (m_cart) m_cart->write_ram(offset, data); }