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// 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<void (nvram_device &, void *, size_t)> 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
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