// license:BSD-3-Clause // copyright-holders:S. Smith,David Haywood,Fabio Priuli /*********************************************************************************************************** Neo Geo cart emulation Standard cart type, possibly with bankswitch in the area beyond 0x100000 (We also include here V-Liner, which uses a standard cart + RAM + some custom input) ***********************************************************************************************************/ #include "emu.h" #include "rom.h" //------------------------------------------------- // neogeo_rom_device - constructor //------------------------------------------------- DEFINE_DEVICE_TYPE(NEOGEO_ROM, neogeo_rom_device, "neocart_rom", "Neo Geo Standard Carts") neogeo_rom_device::neogeo_rom_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint16_t clock) : device_t(mconfig, type, tag, owner, clock), device_neogeo_cart_interface(mconfig, *this) { } neogeo_rom_device::neogeo_rom_device(const machine_config &mconfig, const char *tag, device_t *owner, uint16_t clock) : neogeo_rom_device(mconfig, NEOGEO_ROM, tag, owner, clock) { } //------------------------------------------------- // mapper specific start/reset //------------------------------------------------- void neogeo_rom_device::device_start() { } void neogeo_rom_device::device_reset() { } /*------------------------------------------------- mapper specific handlers -------------------------------------------------*/ uint16_t neogeo_rom_device::rom_r(offs_t offset) { // to speed up access to ROM, the access to ROM are actually replaced in the driver // by accesses to the maincpu rom region, where we have anyway copied the rom content uint16_t* rom = (get_rom_size()) ? get_rom_base() : get_region_rom_base(); return rom[offset]; } void neogeo_rom_device::banksel_w(uint16_t data) { // to speed up access to ROM, the banking is taken care of at driver level // by mapping higher banks to the corresponding offset in maincpu rom region } /************************************************* V-Liner : this is plain NeoGeo cart + RAM **************************************************/ DEFINE_DEVICE_TYPE(NEOGEO_VLINER_CART, neogeo_vliner_cart_device, "neocart_vliner", "Neo Geo V-Liner Cart") neogeo_vliner_cart_device::neogeo_vliner_cart_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock) : neogeo_rom_device(mconfig, NEOGEO_VLINER_CART, tag, owner, clock), m_nvram(*this, "nvram") { } void neogeo_vliner_cart_device::device_start() { m_cart_ram = make_unique_clear(0x2000/2); m_nvram->set_base(m_cart_ram.get(), 0x2000); save_pointer(NAME(m_cart_ram), 0x2000/2); } void neogeo_vliner_cart_device::device_add_mconfig(machine_config &config) { NVRAM(config, m_nvram); }