/*************************************************************************** nvram.h Generic non-volatile RAM. **************************************************************************** Copyright Aaron Giles All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. * Neither the name 'MAME' nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY AARON GILES ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL AARON GILES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ***************************************************************************/ #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, const char *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(); // device_nvram_interface overrides virtual void nvram_default(); virtual void nvram_read(emu_file &file); virtual void nvram_write(emu_file &file); // 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