// license:BSD-3-Clause // copyright-holders:Fabio Priuli /*********************************************************************************************************** Fairchild Channel F cart emulation (through slot devices) ***********************************************************************************************************/ #include "emu.h" #include "slot.h" //************************************************************************** // GLOBAL VARIABLES //************************************************************************** DEFINE_DEVICE_TYPE(CHANF_CART_SLOT, channelf_cart_slot_device, "chanf_cart_slot", "Fairchild Channel F Cartridge Slot") //************************************************************************** // Channel F cartridges Interface //************************************************************************** //------------------------------------------------- // device_channelf_cart_interface - constructor //------------------------------------------------- device_channelf_cart_interface::device_channelf_cart_interface(const machine_config &mconfig, device_t &device) : device_interface(device, "chanfcart"), m_rom(nullptr), m_rom_size(0) { } //------------------------------------------------- // ~device_channelf_cart_interface - destructor //------------------------------------------------- device_channelf_cart_interface::~device_channelf_cart_interface() { } //------------------------------------------------- // rom_alloc - alloc the space for the cart //------------------------------------------------- void device_channelf_cart_interface::rom_alloc(uint32_t size, const char *tag) { if (m_rom == nullptr) { m_rom = device().machine().memory().region_alloc(std::string(tag).append(CHANFSLOT_ROM_REGION_TAG).c_str(), size, 1, ENDIANNESS_LITTLE)->base(); m_rom_size = size; } } //------------------------------------------------- // ram_alloc - alloc the space for the ram //------------------------------------------------- void device_channelf_cart_interface::ram_alloc(uint32_t size) { m_ram.resize(size); } //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // channelf_cart_slot_device - constructor //------------------------------------------------- channelf_cart_slot_device::channelf_cart_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, CHANF_CART_SLOT, tag, owner, clock), device_cartrom_image_interface(mconfig, *this), device_single_card_slot_interface(mconfig, *this), m_type(CF_CHESS), m_cart(nullptr) { } //------------------------------------------------- // ~channelf_cart_slot_device - destructor //------------------------------------------------- channelf_cart_slot_device::~channelf_cart_slot_device() { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void channelf_cart_slot_device::device_start() { m_cart = get_card_device(); } //------------------------------------------------- // Channel F PCB //------------------------------------------------- struct chanf_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 chanf_slot slot_list[] = { { CF_STD, "std" }, { CF_MAZE, "maze" }, { CF_HANGMAN, "hangman" }, { CF_CHESS, "chess" }, { CF_MULTI_OLD,"multi_old" }, { CF_MULTI, "multi" } }; static int chanf_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 *chanf_get_slot(int type) { for (auto & elem : slot_list) { if (elem.pcb_id == type) return elem.slot_option; } return "chess"; } /*------------------------------------------------- call load -------------------------------------------------*/ image_init_result channelf_cart_slot_device::call_load() { if (m_cart) { uint32_t len = !loaded_through_softlist() ? length() : get_software_region_length("rom"); m_cart->rom_alloc(len, tag()); if (!loaded_through_softlist()) fread(m_cart->get_rom_base(), len); else memcpy(m_cart->get_rom_base(), get_software_region("rom"), len); if (!loaded_through_softlist()) { // we default to "chess" slot because some homebrew programs have been written to run // on PCBs with RAM at $2000-$2800 as Saba Schach! if (len == 0x40000) m_type = CF_MULTI; // TODO1: differentiate multicart final and earlier from fullpath else m_type = CF_CHESS; // TODO2: is there any way to detect Maze and Hangman from fullpath? m_cart->ram_alloc(0x800); } else { const char *pcb_name = get_feature("slot"); if (pcb_name) m_type = chanf_get_pcb_id(pcb_name); if (get_software_region("ram")) m_cart->ram_alloc(get_software_region_length("ram")); } //printf("Type: %s\n", chanf_get_slot(m_type)); return image_init_result::PASS; } return image_init_result::PASS; } /*------------------------------------------------- get default card software -------------------------------------------------*/ std::string channelf_cart_slot_device::get_default_card_software(get_default_card_software_hook &hook) const { if (hook.image_file()) { uint64_t len; hook.image_file()->length(len); // FIXME: check error return int type; if (len == 0x40000) type = CF_MULTI; else type = CF_CHESS; // is there any way to detect the other carts from fullpath? char const *const slot_string = chanf_get_slot(type); //printf("type: %s\n", slot_string); return std::string(slot_string); } return software_get_default_slot("chess"); } /*------------------------------------------------- read -------------------------------------------------*/ uint8_t channelf_cart_slot_device::read_rom(offs_t offset) { if (m_cart) return m_cart->read_rom(offset); else return 0xff; } /*------------------------------------------------- read -------------------------------------------------*/ uint8_t channelf_cart_slot_device::read_ram(offs_t offset) { if (m_cart) return m_cart->read_ram(offset); else return 0xff; } /*------------------------------------------------- write -------------------------------------------------*/ void channelf_cart_slot_device::write_ram(offs_t offset, uint8_t data) { if (m_cart) m_cart->write_ram(offset, data); } /*------------------------------------------------- write -------------------------------------------------*/ void channelf_cart_slot_device::write_bank(uint8_t data) { if (m_cart) m_cart->write_bank(data); }