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/***************************************************************************
x2212.h
Xicor X2212 256 x 4 bit Nonvolatile Static RAM.
***************************************************************************/
#pragma once
#ifndef __X2212_H__
#define __X2212_H__
//**************************************************************************
// INTERFACE CONFIGURATION MACROS
//**************************************************************************
#define MCFG_X2212_ADD(_tag) \
MCFG_DEVICE_ADD(_tag, X2212, 0) \
// some systems (like many early Atari games) wire up the /STORE signal
// to fire on power-down, effectively creating an "auto-save" functionality
#define MCFG_X2212_ADD_AUTOSAVE(_tag) \
MCFG_DEVICE_ADD(_tag, X2212, 0) \
x2212_device_config::static_set_auto_save(device); \
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> x2212_device_config
class x2212_device_config : public device_config,
public device_config_memory_interface,
public device_config_nvram_interface
{
friend class x2212_device;
// construction/destruction
x2212_device_config(const machine_config &mconfig, const char *tag, const device_config *owner, UINT32 clock);
public:
// allocators
static device_config *static_alloc_device_config(const machine_config &mconfig, const char *tag, const device_config *owner, UINT32 clock);
virtual device_t *alloc_device(running_machine &machine) const;
// inline configuration helpers
static void static_set_auto_save(device_config *device);
protected:
// device_config_memory_interface overrides
virtual const address_space_config *memory_space_config(int spacenum = 0) const;
// device-specific configuration
address_space_config m_sram_space_config;
address_space_config m_e2prom_space_config;
// internal state
bool m_auto_save;
};
// ======================> x2212_device
class x2212_device : public device_t,
public device_memory_interface,
public device_nvram_interface
{
friend class x2212_device_config;
// construction/destruction
x2212_device(running_machine &_machine, const x2212_device_config &config);
public:
// I/O operations
DECLARE_READ8_MEMBER( read );
DECLARE_WRITE8_MEMBER( write );
DECLARE_WRITE_LINE_MEMBER( store );
DECLARE_WRITE_LINE_MEMBER( recall );
protected:
// internal helpers
void store();
void recall();
// 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);
static const int SIZE_DATA = 0x100;
// internal state
const x2212_device_config &m_config;
address_space * m_sram;
address_space * m_e2prom;
bool m_store;
bool m_array_recall;
};
// device type definition
extern const device_type X2212;
#endif
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