// license:BSD-3-Clause // copyright-holders:Sandro Ronco /*************************************************************************** rom.c Z88 ROM cartridges emulation ***************************************************************************/ #include "emu.h" #include "rom.h" /*************************************************************************** IMPLEMENTATION ***************************************************************************/ //************************************************************************** // GLOBAL VARIABLES //************************************************************************** DEFINE_DEVICE_TYPE(Z88_32K_ROM, z88_32k_rom_device, "z88_32k_rom", "Z88 32KB ROM") DEFINE_DEVICE_TYPE(Z88_128K_ROM, z88_128k_rom_device, "z88_128k_rom", "Z88 128KB ROM") DEFINE_DEVICE_TYPE(Z88_256K_ROM, z88_256k_rom_device, "z88_256k_rom", "Z88 256KB ROM") //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // z88_32k_rom_device - constructor //------------------------------------------------- z88_32k_rom_device::z88_32k_rom_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : z88_32k_rom_device(mconfig, Z88_32K_ROM, tag, owner, clock) { } z88_32k_rom_device::z88_32k_rom_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, type, tag, owner, clock), device_z88cart_interface(mconfig, *this), m_rom(nullptr) { } //------------------------------------------------- // z88_128k_rom_device - constructor //------------------------------------------------- z88_128k_rom_device::z88_128k_rom_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : z88_32k_rom_device(mconfig, Z88_128K_ROM, tag, owner, clock) { } //------------------------------------------------- // z88_256k_rom_device - constructor //------------------------------------------------- z88_256k_rom_device::z88_256k_rom_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : z88_32k_rom_device(mconfig, Z88_256K_ROM, tag, owner, clock) { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void z88_32k_rom_device::device_start() { m_rom = machine().memory().region_alloc(tag(), get_cart_size(), 1, ENDIANNESS_LITTLE)->base(); } /*------------------------------------------------- get_cart_base -------------------------------------------------*/ uint8_t* z88_32k_rom_device::get_cart_base() { return m_rom; } /*------------------------------------------------- read -------------------------------------------------*/ uint8_t z88_32k_rom_device::read(offs_t offset) { return m_rom[offset & (get_cart_size() - 1)]; }