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/*
* x76f100.h
*
* Secure SerialFlash
*
*/
#ifndef __X76F100_H__
#define __X76F100_H__
#define MCFG_X76F100_ADD(_tag) \
MCFG_DEVICE_ADD(_tag, X76F100, 0)
#include "machine/secflash.h"
class x76f100_device_config : public device_secure_serial_flash_config
{
friend class x76f100_device;
// construction/destruction
x76f100_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;
};
class x76f100_device : public device_secure_serial_flash
{
friend class x76f100_device_config;
// construction/destruction
x76f100_device(running_machine &_machine, const x76f100_device_config &config);
protected:
// device-level overrides
virtual void device_start();
virtual void device_reset();
// device_nvram_interface overrides
virtual void nvram_default();
virtual void nvram_read(emu_file &file);
virtual void nvram_write(emu_file &file);
// device_secure_serial_flash implementations
virtual void cs_0();
virtual void cs_1();
virtual void rst_0();
virtual void rst_1();
virtual void scl_0();
virtual void scl_1();
virtual void sda_0();
virtual void sda_1();
// internal state
const x76f100_device_config &config;
enum {
SIZE_WRITE_BUFFER = 8,
SIZE_RESPONSE_TO_RESET = 4,
SIZE_WRITE_PASSWORD = 8,
SIZE_READ_PASSWORD = 8,
SIZE_DATA = 112,
COMMAND_WRITE = 0x80,
COMMAND_READ = 0x81,
COMMAND_CHANGE_WRITE_PASSWORD = 0xfc,
COMMAND_CHANGE_READ_PASSWORD = 0xfe,
COMMAND_ACK_PASSWORD = 0x55
};
enum {
STATE_STOP,
STATE_RESPONSE_TO_RESET,
STATE_LOAD_COMMAND,
STATE_LOAD_PASSWORD,
STATE_VERIFY_PASSWORD,
STATE_READ_DATA,
STATE_WRITE_DATA
};
int state, bit, byte;
UINT8 command, shift;
UINT8 write_buffer[SIZE_WRITE_BUFFER];
UINT8 response_to_reset[SIZE_RESPONSE_TO_RESET];
UINT8 write_password[SIZE_WRITE_PASSWORD];
UINT8 read_password[SIZE_READ_PASSWORD];
UINT8 data[SIZE_DATA];
UINT8 *password();
void password_ok();
int data_offset();
private:
inline void ATTR_PRINTF(3,4) verboselog(int n_level, const char *s_fmt, ...);
};
// device type definition
extern const device_type X76F100;
#endif
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