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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::static_set_auto_save(*device); \
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> x2212_device
class x2212_device : public device_t,
public device_memory_interface,
public device_nvram_interface
{
public:
// construction/destruction
x2212_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
// inline configuration helpers
static void static_set_auto_save(device_t &device);
// 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_memory_interface overrides
virtual const address_space_config *memory_space_config(address_spacenum spacenum = AS_0) const;
// 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;
// configuration state
bool m_auto_save;
// device-specific configuration
address_space_config m_sram_space_config;
address_space_config m_e2prom_space_config;
// internal state
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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