// license:BSD-3-Clause // copyright-holders:Sandro Ronco /*************************************************************************** z88.c Z88 RAM cartridges emulation ***************************************************************************/ #include "emu.h" #include "ram.h" /*************************************************************************** IMPLEMENTATION ***************************************************************************/ //************************************************************************** // GLOBAL VARIABLES //************************************************************************** DEFINE_DEVICE_TYPE(Z88_32K_RAM, z88_32k_ram_device, "z88_32k_ram", "Z88 32KB RAM") DEFINE_DEVICE_TYPE(Z88_128K_RAM, z88_128k_ram_device, "z88_128k_ram", "Z88 128KB RAM") DEFINE_DEVICE_TYPE(Z88_512K_RAM, z88_512k_ram_device, "z88_512k_ram", "Z88 512KB RAM") DEFINE_DEVICE_TYPE(Z88_1024K_RAM, z88_1024k_ram_device, "z88_1024k_ram", "Z88 1024KB RAM") //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // z88_32k_ram_device - constructor //------------------------------------------------- z88_32k_ram_device::z88_32k_ram_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock) : z88_32k_ram_device(mconfig, Z88_32K_RAM, tag, owner, clock) { } z88_32k_ram_device::z88_32k_ram_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, const XTAL &clock) : device_t(mconfig, type, tag, owner, clock) , device_nvram_interface(mconfig, *this) , device_z88cart_interface(mconfig, *this) , m_ram(nullptr) { } //------------------------------------------------- // z88_128k_ram_device - constructor //------------------------------------------------- z88_128k_ram_device::z88_128k_ram_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock) : z88_32k_ram_device(mconfig, Z88_128K_RAM, tag, owner, clock) { } //------------------------------------------------- // z88_512k_ram_device - constructor //------------------------------------------------- z88_512k_ram_device::z88_512k_ram_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock) : z88_32k_ram_device(mconfig, Z88_512K_RAM, tag, owner, clock) { } //------------------------------------------------- // z88_1024k_ram_device - constructor //------------------------------------------------- z88_1024k_ram_device::z88_1024k_ram_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock) : z88_32k_ram_device(mconfig, Z88_1024K_RAM, tag, owner, clock) { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void z88_32k_ram_device::device_start() { m_ram = machine().memory().region_alloc(tag(), get_cart_size(), 1, ENDIANNESS_LITTLE)->base(); memset(m_ram, 0, get_cart_size()); } /*------------------------------------------------- get_cart_base -------------------------------------------------*/ uint8_t* z88_32k_ram_device::get_cart_base() { return m_ram; } /*------------------------------------------------- read -------------------------------------------------*/ uint8_t z88_32k_ram_device::read(offs_t offset) { return m_ram[offset & (get_cart_size() - 1)]; } /*------------------------------------------------- write -------------------------------------------------*/ void z88_32k_ram_device::write(offs_t offset, uint8_t data) { m_ram[offset & (get_cart_size() - 1)] = data; }