// license:BSD-3-Clause // copyright-holders:Fabio Priuli /*********************************************************************************************************** Bally Astrocade cart emulation (through slot devices) ***********************************************************************************************************/ #include "emu.h" #include "slot.h" //************************************************************************** // GLOBAL VARIABLES //************************************************************************** DEFINE_DEVICE_TYPE(ASTROCADE_CART_SLOT, astrocade_cart_slot_device, "astrocade_cart_slot", "Bally Astrocade Cartridge Slot") //************************************************************************** // Astrocade Cartridges Interface //************************************************************************** //------------------------------------------------- // device_astrocade_cart_interface - constructor //------------------------------------------------- device_astrocade_cart_interface::device_astrocade_cart_interface(const machine_config &mconfig, device_t &device) : device_interface(device, "astrocadecart"), m_rom(nullptr), m_rom_size(0) { } //------------------------------------------------- // ~device_astrocade_cart_interface - destructor //------------------------------------------------- device_astrocade_cart_interface::~device_astrocade_cart_interface() { } //------------------------------------------------- // rom_alloc - alloc the space for the cart //------------------------------------------------- void device_astrocade_cart_interface::rom_alloc(uint32_t size) { if (m_rom == nullptr) { m_rom = device().machine().memory().region_alloc(device().subtag("^cart:rom"), size, 1, ENDIANNESS_LITTLE)->base(); m_rom_size = size; } } //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // astrocade_cart_slot_device - constructor //------------------------------------------------- astrocade_cart_slot_device::astrocade_cart_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, ASTROCADE_CART_SLOT, tag, owner, clock), device_cartrom_image_interface(mconfig, *this), device_single_card_slot_interface(mconfig, *this), m_type(ASTROCADE_STD), m_cart(nullptr) { } //------------------------------------------------- // astrocade_cart_slot_device - destructor //------------------------------------------------- astrocade_cart_slot_device::~astrocade_cart_slot_device() { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void astrocade_cart_slot_device::device_start() { m_cart = get_card_device(); } //------------------------------------------------- // ASTROCADE PCB //------------------------------------------------- struct astrocade_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 astrocade_slot slot_list[] = { { ASTROCADE_STD, "rom" }, { ASTROCADE_256K, "rom_256k" }, { ASTROCADE_512K, "rom_512k" }, { ASTROCADE_CASS, "rom_cass" } }; static int astrocade_get_pcb_id(const char *slot) { for (auto & elem : slot_list) { if (!strcmp(elem.slot_option, slot)) return elem.pcb_id; } return 0; } static const char *astrocade_get_slot(int type) { for (auto & elem : slot_list) { if (elem.pcb_id == type) return elem.slot_option; } return "std"; } /*------------------------------------------------- call load -------------------------------------------------*/ std::pair astrocade_cart_slot_device::call_load() { if (m_cart) { uint32_t const size = !loaded_through_softlist() ? length() : get_software_region_length("rom"); m_cart->rom_alloc(size); if (!loaded_through_softlist()) fread(m_cart->get_rom_base(), size); else memcpy(m_cart->get_rom_base(), get_software_region("rom"), size); if (!loaded_through_softlist()) { m_type = ASTROCADE_STD; if (size == 0x40000) m_type = ASTROCADE_256K; if (size == 0x80000) m_type = ASTROCADE_512K; } else { const char *pcb_name = get_feature("slot"); if (pcb_name) m_type = astrocade_get_pcb_id(pcb_name); } //printf("Type: %s\n", astrocade_get_slot(m_type)); } return std::make_pair(std::error_condition(), std::string()); } /*------------------------------------------------- get default card software -------------------------------------------------*/ std::string astrocade_cart_slot_device::get_default_card_software(get_default_card_software_hook &hook) const { if (hook.image_file()) { uint64_t size; hook.image_file()->length(size); // FIXME: check error return int type = ASTROCADE_STD; if (size == 0x40000) type = ASTROCADE_256K; if (size == 0x80000) type = ASTROCADE_512K; char const *const slot_string = astrocade_get_slot(type); //printf("type: %s\n", slot_string); return std::string(slot_string); } return software_get_default_slot("rom"); } /*------------------------------------------------- read -------------------------------------------------*/ uint8_t astrocade_cart_slot_device::read_rom(offs_t offset) { if (m_cart) return m_cart->read_rom(offset); else return 0xff; }