// license:BSD-3-Clause // copyright-holders:Fabio Priuli /*********************************************************************************************************** Nintendo Virtual Boy cart emulation (through slot devices) ***********************************************************************************************************/ #include "emu.h" #include "slot.h" //************************************************************************** // GLOBAL VARIABLES //************************************************************************** DEFINE_DEVICE_TYPE(VBOY_CART_SLOT, vboy_cart_slot_device, "vboy_cart_slot", "Nintendo Virtual Boy Cartridge Slot") //************************************************************************** // vboy cartridges Interface //************************************************************************** //------------------------------------------------- // device_vboy_cart_interface - constructor //------------------------------------------------- device_vboy_cart_interface::device_vboy_cart_interface(const machine_config &mconfig, device_t &device) : device_slot_card_interface(mconfig, device), m_rom(nullptr), m_rom_size(0), m_rom_mask(0) { } //------------------------------------------------- // ~device_vboy_cart_interface - destructor //------------------------------------------------- device_vboy_cart_interface::~device_vboy_cart_interface() { } //------------------------------------------------- // rom_alloc - alloc the space for the cart //------------------------------------------------- void device_vboy_cart_interface::rom_alloc(uint32_t size, const char *tag) { if (m_rom == nullptr) { m_rom = (uint32_t *)device().machine().memory().region_alloc(std::string(tag).append(VBOYSLOT_ROM_REGION_TAG).c_str(), size, 4, ENDIANNESS_LITTLE)->base(); m_rom_size = size/4; m_rom_mask = m_rom_size - 1; } } //------------------------------------------------- // ram_alloc - alloc the space for the ram //------------------------------------------------- void device_vboy_cart_interface::eeprom_alloc(uint32_t size) { m_eeprom.resize(size/sizeof(uint32_t)); } //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // vboy_cart_slot_device - constructor //------------------------------------------------- vboy_cart_slot_device::vboy_cart_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, VBOY_CART_SLOT, tag, owner, clock), device_image_interface(mconfig, *this), device_slot_interface(mconfig, *this), m_type(VBOY_STD), m_cart(nullptr) { } //------------------------------------------------- // vboy_cart_slot_device - destructor //------------------------------------------------- vboy_cart_slot_device::~vboy_cart_slot_device() { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void vboy_cart_slot_device::device_start() { m_cart = dynamic_cast(get_card_device()); } //------------------------------------------------- // vboy PCB //------------------------------------------------- struct vboy_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 vboy_slot slot_list[] = { { VBOY_STD, "vb_rom" }, { VBOY_EEPROM, "vb_eeprom" } }; static int vboy_get_pcb_id(const char *slot) { for (auto & elem : slot_list) { if (!core_stricmp(elem.slot_option, slot)) return elem.pcb_id; } return 0; } #if 0 static const char *vboy_get_slot(int type) { for (int i = 0; i < ARRAY_LENGTH(slot_list); i++) { if (slot_list[i].pcb_id == type) return slot_list[i].slot_option; } return "vb_rom"; } #endif /*------------------------------------------------- call load -------------------------------------------------*/ image_init_result vboy_cart_slot_device::call_load() { if (m_cart) { uint8_t *ROM; uint32_t len = !loaded_through_softlist() ? length() : get_software_region_length("rom"); bool has_eeprom = loaded_through_softlist() && get_software_region("eeprom"); if (len > 0x200000) { seterror(IMAGE_ERROR_UNSPECIFIED, "Unsupported cartridge size"); return image_init_result::FAIL; } // always alloc 0x200000 so to be able to directly map the region // to the address map (speeding up emulation a bit) m_cart->rom_alloc(0x200000, tag()); if (has_eeprom) m_cart->eeprom_alloc(get_software_region_length("eeprom")); ROM = (uint8_t *)m_cart->get_rom_base(); if (!loaded_through_softlist()) fread(ROM, len); else memcpy(ROM, get_software_region("rom"), len); if (len < 0x080000) { memcpy(ROM + 0x040000, ROM, 0x040000); } if (len < 0x100000) { memcpy(ROM + 0x080000, ROM, 0x080000); } if (len < 0x200000) { memcpy(ROM + 0x100000, ROM, 0x100000); } if (!loaded_through_softlist()) m_type = vboy_get_pcb_id("vb_rom"); else { const char *pcb_name = get_feature("slot"); if (pcb_name) m_type = vboy_get_pcb_id(pcb_name); } //printf("Type: %s\n", vboy_get_slot(m_type)); return image_init_result::PASS; } return image_init_result::PASS; } /*------------------------------------------------- call_unload -------------------------------------------------*/ void vboy_cart_slot_device::call_unload() { if (m_cart && m_cart->get_eeprom_base() && m_cart->get_eeprom_size()) battery_save(m_cart->get_eeprom_base(), m_cart->get_eeprom_size() * 4); } /*------------------------------------------------- get default card software -------------------------------------------------*/ std::string vboy_cart_slot_device::get_default_card_software(get_default_card_software_hook &hook) const { return software_get_default_slot("vb_rom"); } /*------------------------------------------------- read -------------------------------------------------*/ READ32_MEMBER(vboy_cart_slot_device::read_cart) { if (m_cart) return m_cart->read_cart(space, offset, mem_mask); else return 0xffffffff; } /*------------------------------------------------- read -------------------------------------------------*/ READ32_MEMBER(vboy_cart_slot_device::read_eeprom) { if (m_cart) return m_cart->read_eeprom(space, offset, mem_mask); else return 0xffffffff; } /*------------------------------------------------- write -------------------------------------------------*/ WRITE32_MEMBER(vboy_cart_slot_device::write_eeprom) { if (m_cart) m_cart->write_eeprom(space, offset, data, mem_mask); }