// license:BSD-3-Clause // copyright-holders:Fabio Priuli /*********************************************************************************************************** Magnavox Odyssey 2 cart emulation (through slot devices) ***********************************************************************************************************/ #include "emu.h" #include "slot.h" //************************************************************************** // GLOBAL VARIABLES //************************************************************************** DEFINE_DEVICE_TYPE(O2_CART_SLOT, o2_cart_slot_device, "o2_cart_slot", "Odyssey 2 Cartridge Slot") //************************************************************************** // Odyssey 2 Cartridges Interface //************************************************************************** //------------------------------------------------- // device_o2_cart_interface - constructor //------------------------------------------------- device_o2_cart_interface::device_o2_cart_interface(const machine_config &mconfig, device_t &device) : device_slot_card_interface(mconfig, device) , m_rom(nullptr) , m_rom_size(0) { } //------------------------------------------------- // ~device_o2_cart_interface - destructor //------------------------------------------------- device_o2_cart_interface::~device_o2_cart_interface() { } //------------------------------------------------- // rom_alloc - alloc the space for the cart //------------------------------------------------- void device_o2_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(O2SLOT_ROM_REGION_TAG).c_str(), size, 1, ENDIANNESS_LITTLE)->base(); m_rom_size = size; } } //------------------------------------------------- // ram_alloc - alloc the space for the ram //------------------------------------------------- void device_o2_cart_interface::ram_alloc(uint32_t size) { m_ram.resize(size); } //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // o2_cart_slot_device - constructor //------------------------------------------------- o2_cart_slot_device::o2_cart_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, O2_CART_SLOT, tag, owner, clock) , device_image_interface(mconfig, *this) , device_slot_interface(mconfig, *this) , m_type(O2_STD), m_cart(nullptr) { } //------------------------------------------------- // o2_cart_slot_device - destructor //------------------------------------------------- o2_cart_slot_device::~o2_cart_slot_device() { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void o2_cart_slot_device::device_start() { m_cart = dynamic_cast(get_card_device()); } //------------------------------------------------- // O2 PCB //------------------------------------------------- struct o2_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 o2_slot slot_list[] = { { O2_STD, "o2_rom" }, { O2_ROM12, "o2_rom12" }, { O2_ROM16, "o2_rom16" }, { O2_CHESS, "o2_chess" }, { O2_VOICE, "o2_voice" } }; static int o2_get_pcb_id(const char *slot) { for (auto & elem : slot_list) { if (!core_stricmp(elem.slot_option, slot)) return elem.pcb_id; } return 0; } static const char *o2_get_slot(int type) { for (auto & elem : slot_list) { if (elem.pcb_id == type) return elem.slot_option; } return "o2_rom"; } /*------------------------------------------------- call load -------------------------------------------------*/ image_init_result o2_cart_slot_device::call_load() { if (m_cart) { uint32_t size = !loaded_through_softlist() ? length() : get_software_region_length("rom"); m_cart->rom_alloc(size, tag()); 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 = O2_STD; if (size == 12288) m_type = O2_ROM12; if (size == 16384) m_type = O2_ROM16; } else { const char *pcb_name = get_feature("slot"); if (pcb_name) m_type = o2_get_pcb_id(pcb_name); } //printf("Type: %s\n", o2_get_slot(m_type)); return image_init_result::PASS; } return image_init_result::PASS; } /*------------------------------------------------- get default card software -------------------------------------------------*/ std::string o2_cart_slot_device::get_default_card_software(get_default_card_software_hook &hook) const { if (hook.image_file()) { const char *slot_string; uint32_t size = hook.image_file()->size(); int type = O2_STD; if (size == 12288) type = O2_ROM12; if (size == 16384) type = O2_ROM16; slot_string = o2_get_slot(type); //printf("type: %s\n", slot_string); return std::string(slot_string); } return software_get_default_slot("o2_rom"); } /*------------------------------------------------- read_rom** -------------------------------------------------*/ READ8_MEMBER(o2_cart_slot_device::read_rom04) { if (m_cart) return m_cart->read_rom04(space, offset); else return 0xff; } READ8_MEMBER(o2_cart_slot_device::read_rom0c) { if (m_cart) return m_cart->read_rom0c(space, offset); else return 0xff; } /*------------------------------------------------- io_write -------------------------------------------------*/ WRITE8_MEMBER(o2_cart_slot_device::io_write) { if (m_cart) m_cart->io_write(space, offset, data); } #include "bus/odyssey2/rom.h" #include "bus/odyssey2/chess.h" #include "bus/odyssey2/voice.h" void o2_cart(device_slot_interface &device) { device.option_add_internal("o2_rom", O2_ROM_STD); device.option_add_internal("o2_rom12", O2_ROM_12K); device.option_add_internal("o2_rom16", O2_ROM_16K); device.option_add_internal("o2_chess", O2_ROM_CHESS); device.option_add_internal("o2_voice", O2_ROM_VOICE); }