// license:BSD-3-Clause // copyright-holders:Aaron Giles,smf /*************************************************************************** timekpr.h Various ST Microelectronics timekeeper SRAM implementations: - M48T02 - M48T35 - M48T37 - M48T58 - MK48T08 - MK48T12 ***************************************************************************/ #include "emu.h" #include "machine/timekpr.h" #include "machine/timehelp.h" // device type definition DEFINE_DEVICE_TYPE(M48T02, m48t02_device, "m48t02", "M48T02 Timekeeper") DEFINE_DEVICE_TYPE(M48T35, m48t35_device, "m48t35", "M48T35 Timekeeper") DEFINE_DEVICE_TYPE(M48T37, m48t37_device, "m48t37", "M48T37 Timekeeper") DEFINE_DEVICE_TYPE(M48T58, m48t58_device, "m48t58", "M48T58 Timekeeper") DEFINE_DEVICE_TYPE(MK48T08, mk48t08_device, "mk48t08", "MK48T08 Timekeeper") DEFINE_DEVICE_TYPE(MK48T12, mk48t12_device, "mk48t12", "MK48T12 Timekeeper") /*************************************************************************** MACROS ***************************************************************************/ #define MASK_SECONDS ( 0x7f ) #define MASK_MINUTES ( 0x7f ) #define MASK_HOURS ( 0x3f ) #define MASK_DAY ( 0x07 ) #define MASK_DATE ( 0x3f ) #define MASK_MONTH ( 0x1f ) #define MASK_YEAR ( 0xff ) #define MASK_CENTURY ( 0xff ) #define CONTROL_W ( 0x80 ) #define CONTROL_R ( 0x40 ) #define CONTROL_S ( 0x20 ) /* not emulated */ #define CONTROL_CALIBRATION ( 0x1f ) /* not emulated */ #define SECONDS_ST ( 0x80 ) #define DAY_FT ( 0x40 ) /* M48T37 - not emulated */ #define DAY_CEB ( 0x20 ) /* M48T35/M48T58 */ #define DAY_CB ( 0x10 ) /* M48T35/M48T58 */ #define DATE_BLE ( 0x80 ) /* M48T58: not emulated */ #define DATE_BL ( 0x40 ) /* M48T58: not emulated */ #define FLAGS_BL ( 0x10 ) /* MK48T08/M48T37: not emulated */ #define FLAGS_AF ( 0x40 ) /* M48T37: not emulated */ #define FLAGS_WDF ( 0x80 ) /* M48T37 */ /*************************************************************************** INLINE FUNCTIONS ***************************************************************************/ static void counter_to_ram( uint8_t *data, int offset, int counter ) { if( offset >= 0 ) { data[ offset ] = counter; } } static int counter_from_ram( uint8_t *data, int offset ) { if( offset >= 0 ) { return data[ offset ]; } return 0; } //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // timekeeper_device_config - constructor //------------------------------------------------- timekeeper_device::timekeeper_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock, int size) : device_t(mconfig, type, tag, owner, clock) , device_nvram_interface(mconfig, *this) , m_reset_cb(*this) , m_irq_cb(*this) , m_default_data(*this, DEVICE_SELF, size) , m_size(size) { } m48t02_device::m48t02_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : timekeeper_device(mconfig, M48T02, tag, owner, clock, 0x800) { m_offset_watchdog = -1; m_offset_control = 0x7f8; m_offset_seconds = 0x7f9; m_offset_minutes = 0x7fa; m_offset_hours = 0x7fb; m_offset_day = 0x7fc; m_offset_date = 0x7fd; m_offset_month = 0x7fe; m_offset_year = 0x7ff; m_offset_century = -1; m_offset_flags = -1; } m48t35_device::m48t35_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : timekeeper_device(mconfig, M48T35, tag, owner, clock, 0x8000) { m_offset_watchdog = -1; m_offset_control = 0x7ff8; m_offset_seconds = 0x7ff9; m_offset_minutes = 0x7ffa; m_offset_hours = 0x7ffb; m_offset_day = 0x7ffc; m_offset_date = 0x7ffd; m_offset_month = 0x7ffe; m_offset_year = 0x7fff; m_offset_century = -1; m_offset_flags = -1; } m48t37_device::m48t37_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : timekeeper_device(mconfig, M48T37, tag, owner, clock, 0x8000) { m_offset_watchdog = 0x7ff7; m_offset_control = 0x7ff8; m_offset_seconds = 0x7ff9; m_offset_minutes = 0x7ffa; m_offset_hours = 0x7ffb; m_offset_day = 0x7ffc; m_offset_date = 0x7ffd; m_offset_month = 0x7ffe; m_offset_year = 0x7fff; m_offset_century = 0x7ff1; m_offset_flags = 0x7ff0; } m48t58_device::m48t58_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : timekeeper_device(mconfig, M48T58, tag, owner, clock, 0x2000) { m_offset_watchdog = -1; m_offset_control = 0x1ff8; m_offset_seconds = 0x1ff9; m_offset_minutes = 0x1ffa; m_offset_hours = 0x1ffb; m_offset_day = 0x1ffc; m_offset_date = 0x1ffd; m_offset_month = 0x1ffe; m_offset_year = 0x1fff; m_offset_century = -1; m_offset_flags = -1; } mk48t08_device::mk48t08_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : timekeeper_device(mconfig, MK48T08, tag, owner, clock, 0x2000) { m_offset_watchdog = -1; m_offset_control = 0x1ff8; m_offset_seconds = 0x1ff9; m_offset_minutes = 0x1ffa; m_offset_hours = 0x1ffb; m_offset_day = 0x1ffc; m_offset_date = 0x1ffd; m_offset_month = 0x1ffe; m_offset_year = 0x1fff; m_offset_century = 0x1ff1; m_offset_flags = 0x1ff0; } mk48t12_device::mk48t12_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : timekeeper_device(mconfig, MK48T12, tag, owner, clock, 0x2000) { m_offset_watchdog = -1; m_offset_control = 0x7f8; m_offset_seconds = 0x7f9; m_offset_minutes = 0x7fa; m_offset_hours = 0x7fb; m_offset_day = 0x7fc; m_offset_date = 0x7fd; m_offset_month = 0x7fe; m_offset_year = 0x7ff; m_offset_century = -1; } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void timekeeper_device::device_start() { system_time systime; /* validate some basic stuff */ assert(this != nullptr); machine().base_datetime(systime); m_control = 0; m_seconds = time_helper::make_bcd( systime.local_time.second ); m_minutes = time_helper::make_bcd( systime.local_time.minute ); m_hours = time_helper::make_bcd( systime.local_time.hour ); m_day = time_helper::make_bcd( systime.local_time.weekday + 1 ); m_date = time_helper::make_bcd( systime.local_time.mday ); m_month = time_helper::make_bcd( systime.local_time.month + 1 ); m_year = time_helper::make_bcd( systime.local_time.year % 100 ); m_century = time_helper::make_bcd( systime.local_time.year / 100 ); m_data.resize( m_size ); save_item( NAME(m_control) ); save_item( NAME(m_seconds) ); save_item( NAME(m_minutes) ); save_item( NAME(m_hours) ); save_item( NAME(m_day) ); save_item( NAME(m_date) ); save_item( NAME(m_month) ); save_item( NAME(m_year) ); save_item( NAME(m_century) ); save_item( NAME(m_data) ); save_item( NAME(m_watchdog_delay)); emu_timer *timer = timer_alloc(); timer->adjust(attotime::from_seconds(1), 0, attotime::from_seconds(1)); m_watchdog_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(timekeeper_device::watchdog_callback), this)); m_watchdog_timer->adjust(attotime::never); m_reset_cb.resolve_safe(); m_irq_cb.resolve_safe(); } //------------------------------------------------- // device_reset - device-specific reset //------------------------------------------------- void timekeeper_device::device_reset() { } void timekeeper_device::counters_to_ram() { counter_to_ram( &m_data[0], m_offset_control, m_control ); counter_to_ram( &m_data[0], m_offset_seconds, m_seconds ); counter_to_ram( &m_data[0], m_offset_minutes, m_minutes ); counter_to_ram( &m_data[0], m_offset_hours, m_hours ); counter_to_ram( &m_data[0], m_offset_day, m_day ); counter_to_ram( &m_data[0], m_offset_date, m_date ); counter_to_ram( &m_data[0], m_offset_month, m_month ); counter_to_ram( &m_data[0], m_offset_year, m_year ); counter_to_ram( &m_data[0], m_offset_century, m_century ); } void timekeeper_device::counters_from_ram() { m_control = counter_from_ram( &m_data[0], m_offset_control ); m_seconds = counter_from_ram( &m_data[0], m_offset_seconds ); m_minutes = counter_from_ram( &m_data[0], m_offset_minutes ); m_hours = counter_from_ram( &m_data[0], m_offset_hours ); m_day = counter_from_ram( &m_data[0], m_offset_day ); m_date = counter_from_ram( &m_data[0], m_offset_date ); m_month = counter_from_ram( &m_data[0], m_offset_month ); m_year = counter_from_ram( &m_data[0], m_offset_year ); m_century = counter_from_ram( &m_data[0], m_offset_century ); } void timekeeper_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) { if( ( m_seconds & SECONDS_ST ) != 0 || ( m_control & CONTROL_W ) != 0 ) { return; } int carry = time_helper::inc_bcd( &m_seconds, MASK_SECONDS, 0x00, 0x59 ); if( carry ) { carry = time_helper::inc_bcd( &m_minutes, MASK_MINUTES, 0x00, 0x59 ); } if( carry ) { carry = time_helper::inc_bcd( &m_hours, MASK_HOURS, 0x00, 0x23 ); } if( carry ) { uint8_t maxdays; static const uint8_t daysinmonth[] = { 0x31, 0x28, 0x31, 0x30, 0x31, 0x30, 0x31, 0x31, 0x30, 0x31, 0x30, 0x31 }; time_helper::inc_bcd( &m_day, MASK_DAY, 0x01, 0x07 ); uint8_t month = time_helper::from_bcd( m_month ); uint8_t year = time_helper::from_bcd( m_year ); if( month == 2 && ( year % 4 ) == 0 ) { maxdays = 0x29; } else if( month >= 1 && month <= 12 ) { maxdays = daysinmonth[ month - 1 ]; } else { maxdays = 0x31; } carry = time_helper::inc_bcd( &m_date, MASK_DATE, 0x01, maxdays ); } if( carry ) { carry = time_helper::inc_bcd( &m_month, MASK_MONTH, 0x01, 0x12 ); } if( carry ) { carry = time_helper::inc_bcd( &m_year, MASK_YEAR, 0x00, 0x99 ); } if( carry ) { carry = time_helper::inc_bcd( &m_century, MASK_CENTURY, 0x00, 0x99 ); if( type() == M48T35 || type() == M48T58 ) { if( ( m_day & DAY_CEB ) != 0 ) { m_day ^= DAY_CB; } } } if( ( m_control & CONTROL_R ) == 0 ) { counters_to_ram(); } } TIMER_CALLBACK_MEMBER(timekeeper_device::watchdog_callback) { // Set Flag m_data[m_offset_flags] |= FLAGS_WDF; // WDS (bit 7) selects callback if (m_data[m_offset_watchdog] & 0x80) { // Clear watchdog register m_data[m_offset_watchdog] = 0; m_reset_cb(ASSERT_LINE); } else { m_irq_cb(ASSERT_LINE); } //printf("watchdog_callback: WD Control: %02x WD Flags: %02x\n", m_data[m_offset_watchdog], m_data[m_offset_flags]); } WRITE8_MEMBER(timekeeper_device::watchdog_write) { if ((m_data[m_offset_watchdog] & 0x7f) != 0) { m_watchdog_timer->adjust(m_watchdog_delay); } } WRITE8_MEMBER( timekeeper_device::write ) { if( offset == m_offset_control ) { if( ( m_control & CONTROL_W ) != 0 && ( data & CONTROL_W ) == 0 ) { counters_from_ram(); } m_control = data; } else if( offset == m_offset_day ) { if( type() == M48T35 || type() == M48T58 ) { m_day = ( m_day & ~DAY_CEB ) | ( data & DAY_CEB ); } } else if (offset == m_offset_watchdog && type() == M48T37) { if ((data & 0x7f) == 0) { m_watchdog_timer->adjust(attotime::never); } else { // Calculate the time unit m_watchdog_delay = attotime::from_usec(62500); m_watchdog_delay *= 4 << (data & 0x3); // Adjust by multiplier m_watchdog_delay *= (data >> 2) & 0x1f; m_watchdog_timer->adjust(m_watchdog_delay); //printf("write: setting watchdog to %s WatchdogReg = 0x%02x\n", m_watchdog_delay.as_string(), data); } } m_data[ offset ] = data; } READ8_MEMBER( timekeeper_device::read ) { uint8_t result = m_data[ offset ]; if( offset == m_offset_date && type() == M48T58 ) { result &= ~DATE_BL; } else if( offset == m_offset_flags && type() == M48T37 ) { // Clear the watchdog flag m_data[m_offset_flags] &= ~FLAGS_WDF; // Clear callbacks m_reset_cb(CLEAR_LINE); m_irq_cb(CLEAR_LINE); } return result; } //------------------------------------------------- // nvram_default - called to initialize NVRAM to // its default state //------------------------------------------------- void timekeeper_device::nvram_default() { if (m_default_data.found()) { memcpy( &m_data[0], m_default_data, m_size ); } else { memset( &m_data[0], 0xff, m_data.size()); } if ( m_offset_flags >= 0 ) m_data[ m_offset_flags ] = 0; counters_to_ram(); } //------------------------------------------------- // nvram_read - called to read NVRAM from the // .nv file //------------------------------------------------- void timekeeper_device::nvram_read(emu_file &file) { file.read( &m_data[0], m_size ); counters_to_ram(); } //------------------------------------------------- // nvram_write - called to write NVRAM to the // .nv file //------------------------------------------------- void timekeeper_device::nvram_write(emu_file &file) { file.write( &m_data[0], m_size ); }