// license:BSD-3-Clause // copyright-holders:Sandro Ronco /*************************************************************************** z88.c Z88 RAM cartridges emulation ***************************************************************************/ #include "emu.h" #include "ram.h" /*************************************************************************** IMPLEMENTATION ***************************************************************************/ //************************************************************************** // GLOBAL VARIABLES //************************************************************************** const device_type Z88_32K_RAM = &device_creator; const device_type Z88_128K_RAM = &device_creator; const device_type Z88_512K_RAM = &device_creator; const device_type Z88_1024K_RAM = &device_creator; //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // z88_32k_ram_device - constructor //------------------------------------------------- z88_32k_ram_device::z88_32k_ram_device(const machine_config &mconfig, std::string tag, device_t *owner, UINT32 clock) : device_t(mconfig, Z88_32K_RAM, "Z88 32KB RAM", tag, owner, clock, "z88_32k_ram", __FILE__), device_z88cart_interface( mconfig, *this ), m_ram(nullptr) { } z88_32k_ram_device::z88_32k_ram_device(const machine_config &mconfig, device_type type, const char *name, std::string tag, device_t *owner, UINT32 clock, const char *shortname, const char *source) : device_t(mconfig, type, name, tag, owner, clock, shortname, source), 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, std::string tag, device_t *owner, UINT32 clock) : z88_32k_ram_device(mconfig, Z88_128K_RAM, "Z88 128KB RAM", tag, owner, clock, "z88_128k_ram", __FILE__) { } //------------------------------------------------- // z88_512k_ram_device - constructor //------------------------------------------------- z88_512k_ram_device::z88_512k_ram_device(const machine_config &mconfig, std::string tag, device_t *owner, UINT32 clock) : z88_32k_ram_device(mconfig, Z88_512K_RAM, "Z88 512KB RAM", tag, owner, clock, "z88_512k_ram", __FILE__) { } //------------------------------------------------- // z88_1024k_ram_device - constructor //------------------------------------------------- z88_1024k_ram_device::z88_1024k_ram_device(const machine_config &mconfig, std::string tag, device_t *owner, UINT32 clock) : z88_32k_ram_device(mconfig, Z88_1024K_RAM, "Z88 1024KB RAM", tag, owner, clock, "z88_1024k_ram", __FILE__) { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void z88_32k_ram_device::device_start() { m_ram = machine().memory().region_alloc(tag().c_str(), get_cart_size(), 1, ENDIANNESS_LITTLE)->base(); memset(m_ram, 0, get_cart_size()); } /*------------------------------------------------- get_cart_base -------------------------------------------------*/ UINT8* z88_32k_ram_device::get_cart_base() { return m_ram; } /*------------------------------------------------- read -------------------------------------------------*/ READ8_MEMBER(z88_32k_ram_device::read) { return m_ram[offset & (get_cart_size() - 1)]; } /*------------------------------------------------- write -------------------------------------------------*/ WRITE8_MEMBER(z88_32k_ram_device::write) { m_ram[offset & (get_cart_size() - 1)] = data; }