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/***************************************************************************
ATMEL AT28C16
16K ( 2K x 8 ) Parallel EEPROM
***************************************************************************/
#pragma once
#ifndef __AT28C16_H__
#define __AT28C16_H__
//**************************************************************************
// INTERFACE CONFIGURATION MACROS
//**************************************************************************
#define MCFG_AT28C16_ADD( _tag, _interface ) \
MCFG_DEVICE_ADD( _tag, AT28C16, 0 )
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> at28c16_interface
struct at28c16_interface
{
};
// ======================> at28c16_device
class at28c16_device :
public device_t,
public device_memory_interface,
public device_nvram_interface,
public at28c16_interface
{
public:
// construction/destruction
at28c16_device( const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock );
// I/O operations
void write( offs_t offset, UINT8 data );
UINT8 read( offs_t offset );
void set_a9_12v( int state );
void set_oe_12v( int state );
protected:
// device-level overrides
virtual void device_config_complete();
virtual void device_validity_check(validity_checker &valid) const;
virtual void device_start();
virtual void device_reset();
// 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 );
// internal helpers
static TIMER_CALLBACK( write_finished );
// internal state
address_space_config m_space_config;
emu_timer *m_write_timer;
int m_a9_12v;
int m_oe_12v;
int m_last_write;
};
// device type definition
extern const device_type AT28C16;
//**************************************************************************
// READ/WRITE HANDLERS
//**************************************************************************
WRITE8_DEVICE_HANDLER( at28c16_w );
READ8_DEVICE_HANDLER( at28c16_r );
WRITE_LINE_DEVICE_HANDLER( at28c16_a9_12v );
WRITE_LINE_DEVICE_HANDLER( at28c16_oe_12v );
#endif
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