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// license:BSD-3-Clause
// copyright-holders:smf,Carl
/*
* ds1205.h
*
* MultiKey
*
*/
#ifndef MAME_MACHINE_DS1205_H
#define MAME_MACHINE_DS1205_H
#pragma once
class ds1205_device : public device_t, public device_nvram_interface
{
public:
// construction/destruction
ds1205_device( const machine_config &mconfig, const char *tag, device_t *owner, u32 clock = 0);
void write_rst(int state);
void write_clk(int state);
void write_dq(int state);
int read_dq();
protected:
// device-level overrides
virtual void device_start() override ATTR_COLD;
// device_nvram_interface overrides
virtual void nvram_default() override;
virtual bool nvram_read( util::read_stream &file ) override;
virtual bool nvram_write( util::write_stream &file ) override;
private:
inline void ATTR_PRINTF( 3, 4 ) verboselog( int n_level, const char *s_fmt, ... );
void new_state(int state);
void writebit(u8 *buffer);
void readbit(u8 *buffer);
enum state_t
{
STATE_STOP,
STATE_PROTOCOL,
STATE_READ_IDENTIFICATION,
STATE_WRITE_IDENTIFICATION,
STATE_WRITE_COMPARE_REGISTER,
STATE_WRITE_SECURITY_MATCH,
STATE_READ_DATA,
STATE_WRITE_DATA,
STATE_READ_SCRATCH,
STATE_WRITE_SCRATCH,
STATE_OUTPUT_GARBLED_DATA
};
enum command_t
{
COMMAND_SET_SCRATCHPAD = 0x96,
COMMAND_GET_SCRATCHPAD = 0x69,
COMMAND_SET_DATA = 0x99,
COMMAND_GET_DATA = 0x66,
COMMAND_SET_SECURITY = 0x5a,
COMMAND_MOVE_BLOCK = 0x3c
};
enum cycle_t
{
CYCLE_NORMAL = 1,
CYCLE_PROGRAM = 2,
CYCLE_MASK = 3
};
static const int DQ_HIGH_IMPEDANCE = -1;
optional_memory_region m_region;
int m_rst;
int m_clk;
int m_dqw;
int m_dqr;
int m_state;
int m_bit;
u8 m_command[3];
u8 m_compare_register[8];
u8 m_scratchpad[64];
u8 m_identification[3][8];
u8 m_security_match[3][8];
u8 m_secure_memory[3][48];
};
// device type definition
DECLARE_DEVICE_TYPE(DS1205, ds1205_device)
#endif // MAME_MACHINE_DS1205_H
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