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author | 2015-09-13 08:41:44 +0200 | |
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committer | 2015-09-13 08:41:44 +0200 | |
commit | f88cefad27a1737c76e09d99c9fb43e173506081 (patch) | |
tree | 2d8167d03579c46e226471747eb4407bd00ed6fa /src/emu/machine/mm58167.c | |
parent | e92ac9e0fa8e99869894bea00589bbb526be30aa (diff) |
Move all devices into separate part of src tree (nw)
Diffstat (limited to 'src/emu/machine/mm58167.c')
-rw-r--r-- | src/emu/machine/mm58167.c | 261 |
1 files changed, 0 insertions, 261 deletions
diff --git a/src/emu/machine/mm58167.c b/src/emu/machine/mm58167.c deleted file mode 100644 index 74572770710..00000000000 --- a/src/emu/machine/mm58167.c +++ /dev/null @@ -1,261 +0,0 @@ -// license:BSD-3-Clause -// copyright-holders:R. Belmont -/********************************************************************** - - mm58167.c - National Semiconductor MM58167 real-time clock emulation - - TODO: standby interrupt - -**********************************************************************/ - -#include "mm58167.h" - -//************************************************************************** -// LIVE DEVICE -//************************************************************************** - -// device type definition -const device_type MM58167 = &device_creator<mm58167_device>; - -// registers (0-7 are the live data, 8-f are the setting for the compare IRQ) -typedef enum -{ - R_CNT_MILLISECONDS = 0, // 0 = milliseconds - R_CNT_HUNDTENTHS, // 1 = hundreds and tenths of seconds - R_CNT_SECONDS, // 2 = seconds - R_CNT_MINUTES, // 3 = minutes - R_CNT_HOURS, // 4 = hours - R_CNT_DAYOFWEEK, // 5 = day of the week - R_CNT_DAYOFMONTH, // 6 = day of the month - R_CNT_MONTH, // 7 = month - R_RAM_MILLISECONDS, // 8 = milliseconds - R_RAM_HUNDTENTHS, // 9 = hundreds and tenths of seconds - R_RAM_SECONDS, // a = seconds - R_RAM_MINUTES, // b = minutes - R_RAM_HOURS, // c = hours - R_RAM_DAYOFWEEK, // d = day of the week - R_RAM_DAYOFMONTH, // e = day of the month - R_RAM_MONTH, // f = month - R_CTL_IRQSTATUS, // 10 = IRQ status (b7 = compare, b6 = 10th sec, b5 = sec, b4 = min, b3 = hour, b2 = day, b1 = week, b0 = month) - R_CTL_IRQCONTROL, // 11 = IRQ control (same bit layout as status, but write here to enable/disable/clear) - R_CTL_RESETCOUNTERS, // 12 = reset counters - R_CTL_RESETRAM, // 13 = reset RAM - R_CTL_STATUS, // 14 = status bit - R_CTL_GOCMD, // 15 = GO Command - R_CTL_STANDBYIRQ, // 16 = standby IRQ - R_CTL_TESTMODE // 17 = test mode -} mm58167_regs_t; - -//------------------------------------------------- -// mm58167_device - constructor -//------------------------------------------------- - -mm58167_device::mm58167_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) - : device_t(mconfig, MM58167, "National Semiconductor MM58167", tag, owner, clock, "mm58167", __FILE__), - device_rtc_interface(mconfig, *this), - m_irq_w(*this) -{ -} - - -//------------------------------------------------- -// device_start - device-specific startup -//------------------------------------------------- - -void mm58167_device::device_start() -{ - // allocate timers - m_clock_timer = timer_alloc(); - m_clock_timer->adjust(attotime::from_hz(clock() / 32.768f), 0, attotime::from_hz(clock() / 32.768f)); - - m_irq_w.resolve_safe(); - - // state saving - save_item(NAME(m_regs)); - save_item(NAME(m_milliseconds)); - save_item(NAME(m_comparator_state)); -} - - -//------------------------------------------------- -// device_reset - device-specific reset -//------------------------------------------------- - -void mm58167_device::device_reset() -{ - set_current_time(machine()); - - m_regs[R_CTL_STATUS] = 0; // not busy - m_regs[R_CTL_IRQSTATUS] = 0; - m_regs[R_CTL_IRQCONTROL] = 0; - m_milliseconds = 0; - m_comparator_state = false; -} - - -INLINE UINT8 make_bcd(UINT8 data) -{ - return ((data / 10) << 4) | (data % 10); -} - -//------------------------------------------------- -// device_timer - handler timer events -//------------------------------------------------- - -void mm58167_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) -{ - m_milliseconds++; - - if (m_milliseconds >= 999) - { - int old_seconds = m_regs[R_CNT_SECONDS]; - int old_minutes = m_regs[R_CNT_MINUTES]; - int old_hours = m_regs[R_CNT_HOURS]; - int old_dayofmonth = m_regs[R_CNT_DAYOFMONTH]; - int old_dayofweek = m_regs[R_CNT_DAYOFWEEK]; - int old_month = m_regs[R_CNT_MONTH]; - - advance_seconds(); - m_milliseconds = 0; - - if ((m_regs[R_CTL_IRQCONTROL] & 0x04) && m_regs[R_CNT_SECONDS] != old_seconds) set_irq(2); // every second - if ((m_regs[R_CTL_IRQCONTROL] & 0x08) && m_regs[R_CNT_MINUTES] != old_minutes) set_irq(3); // every minute - if ((m_regs[R_CTL_IRQCONTROL] & 0x10) && m_regs[R_CNT_HOURS] != old_hours) set_irq(4); // every hour - if ((m_regs[R_CTL_IRQCONTROL] & 0x20) && m_regs[R_CNT_DAYOFMONTH] != old_dayofmonth) set_irq(5); // every day - if ((m_regs[R_CTL_IRQCONTROL] & 0x40) && m_regs[R_CNT_DAYOFWEEK] < old_dayofweek) set_irq(6); // every week - if ((m_regs[R_CTL_IRQCONTROL] & 0x80) && m_regs[R_CNT_MONTH] != old_month) set_irq(7); // every month - } - - m_regs[R_CNT_MILLISECONDS] = make_bcd(m_milliseconds % 10); - m_regs[R_CNT_HUNDTENTHS] = make_bcd(m_milliseconds / 10); - - // 10Hz IRQ - if ((m_regs[R_CTL_IRQCONTROL] & 0x02) && (m_milliseconds % 100) == 0) - set_irq(1); - - // comparator IRQ - bool new_state = true; - for (int i = R_CNT_MILLISECONDS; i <= R_CNT_MONTH; i++) - { - // nibbles that have the 2 MSB set always compares true - // Milliseconds use only the high nibble and Day of Week only the low nibble - if ((i != R_CNT_MILLISECONDS && (m_regs[i + 8] & 0x0c) != 0x0c && (m_regs[i + 8] & 0x0f) != (m_regs[i] & 0x0f)) || - (i != R_CNT_DAYOFWEEK && (m_regs[i + 8] & 0xc0) != 0xc0 && (m_regs[i + 8] & 0xf0) != (m_regs[i] & 0xf0))) - { - new_state = false; - break; - } - } - - if ((m_regs[R_CTL_IRQCONTROL] & 0x01) && !m_comparator_state && new_state) // positive-edge-triggered - set_irq(0); - - m_comparator_state = new_state; -} - - -//------------------------------------------------- -// rtc_clock_updated - -//------------------------------------------------- - -void mm58167_device::rtc_clock_updated(int year, int month, int day, int day_of_week, int hour, int minute, int second) -{ - m_regs[R_CNT_SECONDS] = make_bcd(second); // seconds (BCD) - m_regs[R_CNT_MINUTES] = make_bcd(minute); // minutes (BCD) - m_regs[R_CNT_HOURS] = make_bcd(hour); // hour (BCD) - m_regs[R_CNT_DAYOFWEEK] = make_bcd(day_of_week); // day of the week (BCD) - m_regs[R_CNT_DAYOFMONTH] = make_bcd(day); // day of the month (BCD) - m_regs[R_CNT_MONTH] = make_bcd(month); // month (BCD) -} - -void mm58167_device::set_irq(int bit) -{ - m_regs[R_CTL_IRQSTATUS] |= (1 << bit); - m_irq_w(ASSERT_LINE); -} - -void mm58167_device::update_rtc() -{ - set_clock_register(RTC_SECOND, bcd_to_integer(m_regs[R_CNT_SECONDS])); - set_clock_register(RTC_MINUTE, bcd_to_integer(m_regs[R_CNT_MINUTES])); - set_clock_register(RTC_HOUR, bcd_to_integer(m_regs[R_CNT_HOURS])); - set_clock_register(RTC_DAY, bcd_to_integer(m_regs[R_CNT_DAYOFMONTH])); - set_clock_register(RTC_DAY_OF_WEEK, bcd_to_integer(m_regs[R_CNT_DAYOFWEEK])); - set_clock_register(RTC_MONTH, bcd_to_integer(m_regs[R_CNT_MONTH])); - m_milliseconds = (bcd_to_integer(m_regs[R_CNT_HUNDTENTHS]) * 10) + (bcd_to_integer(m_regs[R_CNT_MILLISECONDS] >> 4) % 10); -} - -READ8_MEMBER(mm58167_device::read) -{ -// printf("read reg %x = %02x\n", offset, m_regs[offset]); - - if (offset == R_CTL_IRQSTATUS && !space.debugger_access()) - { - // reading the IRQ status clears IRQ line and IRQ status - UINT8 data = m_regs[offset]; - m_regs[R_CTL_IRQSTATUS] = 0; - m_irq_w(CLEAR_LINE); - return data; - } - - return m_regs[offset]; -} - -WRITE8_MEMBER(mm58167_device::write) -{ -// printf("%02x to reg %x\n", data, offset); - - if ((offset >= R_RAM_MILLISECONDS) && (offset != R_CTL_IRQSTATUS)) - { - m_regs[offset] = data; - } - - switch (offset) - { - case R_CNT_MILLISECONDS: - case R_CNT_HUNDTENTHS: - case R_CNT_SECONDS: - case R_CNT_MINUTES: - case R_CNT_HOURS: - case R_CNT_DAYOFWEEK: - case R_CNT_DAYOFMONTH: - case R_CNT_MONTH: - m_regs[offset] = data; - update_rtc(); - break; - - // any write to this starts at the current time and zero milliseconds - case R_CTL_GOCMD: - m_milliseconds = 0; - break; - - case R_CTL_RESETCOUNTERS: - if (data == 0xff) - { - for (int i = R_CNT_MILLISECONDS; i <= R_CNT_MONTH; i++) - { - m_regs[i] = 0; - } - - update_rtc(); - } - break; - - case R_CTL_RESETRAM: - if (data == 0xff) - { - for (int i = R_RAM_MILLISECONDS; i < R_CTL_IRQSTATUS; i++) - { - m_regs[i] = 0; - } - } - break; - - case R_CTL_IRQCONTROL: - if (data != 0) - { - logerror("MM58167: IRQs not implemented\n"); - } - break; - } -} |