// license:BSD-3-Clause // copyright-holders:David Haywood #include "emu.h" #include "slot.h" //************************************************************************** // GLOBAL VARIABLES //************************************************************************** DEFINE_DEVICE_TYPE(GAMATE_CART_SLOT, gamate_cart_slot_device, "gamate_cart_slot", "Gamate Cartridge Slot") //************************************************************************** // GAMATE cartridges Interface //************************************************************************** //------------------------------------------------- // device_gamate_cart_interface - constructor //------------------------------------------------- device_gamate_cart_interface::device_gamate_cart_interface(const machine_config &mconfig, device_t &device) : device_interface(device, "gamatecart"), m_rom(nullptr), m_rom_size(0) { } //------------------------------------------------- // ~device_gamate_cart_interface - destructor //------------------------------------------------- device_gamate_cart_interface::~device_gamate_cart_interface() { } //------------------------------------------------- // rom_alloc - alloc the space for the cart //------------------------------------------------- void device_gamate_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_BIG)->base(); m_rom_size = size; } } //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // gamate_cart_slot_device - constructor //------------------------------------------------- gamate_cart_slot_device::gamate_cart_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, GAMATE_CART_SLOT, tag, owner, clock), device_cartrom_image_interface(mconfig, *this), device_single_card_slot_interface(mconfig, *this), m_type(GAMATE_PLAIN), m_cart(nullptr) { } //------------------------------------------------- // gamate_cart_slot_device - destructor //------------------------------------------------- gamate_cart_slot_device::~gamate_cart_slot_device() { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void gamate_cart_slot_device::device_start() { m_cart = get_card_device(); } //------------------------------------------------- // GAMATE PCB //------------------------------------------------- struct gamate_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 gamate_slot slot_list[] = { { GAMATE_PLAIN, "plain" }, { GAMATE_BANKED, "banked" }, { GAMATE_4IN1, "4in1" }, }; static int gamate_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 *gamate_get_slot(int type) { for (auto & elem : slot_list) { if (elem.pcb_id == type) return elem.slot_option; } return "plain"; } /*------------------------------------------------- call load -------------------------------------------------*/ std::pair gamate_cart_slot_device::call_load() { if (m_cart) { uint32_t const len = !loaded_through_softlist() ? length() : get_software_region_length("rom"); if (len > 0x8'0000) return std::make_pair(image_error::INVALIDLENGTH, "Unsupported cartridge size (must be no more than 512K)"); m_cart->rom_alloc(len); uint8_t *const ROM = m_cart->get_rom_base(); if (!loaded_through_softlist()) fread(ROM, len); else memcpy(ROM, get_software_region("rom"), len); if (!loaded_through_softlist()) { // attempt to detect cart type without softlist assistance m_type = get_cart_type(ROM, len); } else { // or for softlist loading, use the type specified const char *pcb_name = get_feature("slot"); if (pcb_name) m_type = gamate_get_pcb_id(pcb_name); } } return std::make_pair(std::error_condition(), std::string()); } /*------------------------------------------------- get_cart_type - code to detect cart type from fullpath -------------------------------------------------*/ int gamate_cart_slot_device::get_cart_type(const uint8_t *ROM, uint32_t len) { int type = GAMATE_PLAIN; switch (len) { case 0x4000: case 0x8000: type = GAMATE_PLAIN; break; case 0x10000: case 0x20000: case 0x40000: case 0x80000: type = GAMATE_BANKED; break; } return type; } /*------------------------------------------------- get default card software -------------------------------------------------*/ std::string gamate_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, guard against excessively large files std::vector rom(len); /*auto const [err, actual] =*/ read(*hook.image_file(), &rom[0], len); // FIXME: check error return or read returning short int const type = get_cart_type(&rom[0], len); char const *const slot_string = gamate_get_slot(type); //printf("type: %s\n", slot_string); return std::string(slot_string); } return software_get_default_slot("plain"); } /*------------------------------------------------- read -------------------------------------------------*/ uint8_t gamate_cart_slot_device::read_cart(offs_t offset) { if (m_cart) { return m_cart->read_cart(offset); } else return 0xff; } /*------------------------------------------------- write -------------------------------------------------*/ void gamate_cart_slot_device::write_cart(offs_t offset, uint8_t data) { if (m_cart) { m_cart->write_cart(offset, data); } }