// license:BSD-3-Clause // copyright-holders:Aaron Giles /*************************************************************************** nvram.h Generic non-volatile RAM. ***************************************************************************/ #pragma once #ifndef __NVRAM_H__ #define __NVRAM_H__ //************************************************************************** // INTERFACE CONFIGURATION MACROS //************************************************************************** #define MCFG_NVRAM_ADD_0FILL(_tag) \ MCFG_DEVICE_ADD(_tag, NVRAM, 0) \ nvram_device::static_set_default_value(*device, nvram_device::DEFAULT_ALL_0); #define MCFG_NVRAM_ADD_1FILL(_tag) \ MCFG_DEVICE_ADD(_tag, NVRAM, 0) \ nvram_device::static_set_default_value(*device, nvram_device::DEFAULT_ALL_1); #define MCFG_NVRAM_ADD_RANDOM_FILL(_tag) \ MCFG_DEVICE_ADD(_tag, NVRAM, 0) \ nvram_device::static_set_default_value(*device, nvram_device::DEFAULT_RANDOM); #define MCFG_NVRAM_ADD_NO_FILL(_tag) \ MCFG_DEVICE_ADD(_tag, NVRAM, 0) \ nvram_device::static_set_default_value(*device, nvram_device::DEFAULT_NONE); #define MCFG_NVRAM_ADD_CUSTOM_DRIVER(_tag, _class, _method) \ MCFG_DEVICE_ADD(_tag, NVRAM, 0) \ nvram_device::static_set_custom_handler(*device, nvram_init_delegate(&_class::_method, #_class "::" #_method, NULL, (_class *)0)); #define MCFG_NVRAM_REPLACE_0FILL(_tag) \ MCFG_DEVICE_REPLACE(_tag, NVRAM, 0) \ nvram_device::static_set_default_value(*device, nvram_device::DEFAULT_ALL_0); #define MCFG_NVRAM_REPLACE_1FILL(_tag) \ MCFG_DEVICE_REPLACE(_tag, NVRAM, 0) \ nvram_device::static_set_default_value(*device, nvram_device::DEFAULT_ALL_1); #define MCFG_NVRAM_REPLACE_RANDOM_FILL(_tag) \ MCFG_DEVICE_REPLACE(_tag, NVRAM, 0) \ nvram_device::static_set_default_value(*device, nvram_device::DEFAULT_RANDOM); #define MCFG_NVRAM_REPLACE_CUSTOM_DRIVER(_tag, _class, _method) \ MCFG_DEVICE_REPLACE(_tag, NVRAM, 0) \ nvram_device::static_set_custom_handler(*device, nvram_init_delegate(&_class::_method, #_class "::" #_method, NULL, (_class *)0)); //************************************************************************** // TYPE DEFINITIONS //************************************************************************** class nvram_device; // custom initialization for default state typedef device_delegate nvram_init_delegate; // ======================> nvram_device class nvram_device : public device_t, public device_nvram_interface { public: // values enum default_value { DEFAULT_ALL_0, DEFAULT_ALL_1, DEFAULT_RANDOM, DEFAULT_CUSTOM, DEFAULT_NONE }; // construction/destruction nvram_device(const machine_config &mconfig, std::string tag, device_t *owner, UINT32 clock); // inline configuration helpers static void static_set_default_value(device_t &device, default_value value); static void static_set_custom_handler(device_t &device, nvram_init_delegate callback); // controls void set_base(void *base, size_t length) { m_base = base; m_length = length; } protected: // device-level overrides virtual void device_start() override; // device_nvram_interface overrides virtual void nvram_default() override; virtual void nvram_read(emu_file &file) override; virtual void nvram_write(emu_file &file) override; // internal helpers void determine_final_base(); // configuration state default_value m_default_value; nvram_init_delegate m_custom_handler; // runtime state void * m_base; size_t m_length; }; // device type definition extern const device_type NVRAM; #endif