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-rw-r--r--trunk/src/emu/machine/rp5c01.c527
1 files changed, 527 insertions, 0 deletions
diff --git a/trunk/src/emu/machine/rp5c01.c b/trunk/src/emu/machine/rp5c01.c
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index 00000000000..3473e0d398f
--- /dev/null
+++ b/trunk/src/emu/machine/rp5c01.c
@@ -0,0 +1,527 @@
+/**********************************************************************
+
+ Ricoh RP5C01(A) Real Time Clock With Internal RAM emulation
+
+ Copyright MESS Team.
+ Visit http://mamedev.org for licensing and usage restrictions.
+
+*********************************************************************/
+
+/*
+
+ TODO:
+
+ - 12 hour clock
+ - test register
+ - timer reset
+
+*/
+
+#include "rp5c01.h"
+
+
+// device type definition
+const device_type RP5C01 = &device_creator<rp5c01_device>;
+
+
+//**************************************************************************
+// MACROS / CONSTANTS
+//**************************************************************************
+
+#define LOG 0
+
+
+#define RAM_SIZE 13
+
+
+// registers
+enum
+{
+ REGISTER_1_SECOND = 0,
+ REGISTER_10_SECOND,
+ REGISTER_1_MINUTE,
+ REGISTER_10_MINUTE,
+ REGISTER_1_HOUR,
+ REGISTER_10_HOUR,
+ REGISTER_DAY_OF_THE_WEEK,
+ REGISTER_1_DAY,
+ REGISTER_10_DAY,
+ REGISTER_1_MONTH,
+ REGISTER_10_MONTH, REGISTER_12_24_SELECT = REGISTER_10_MONTH,
+ REGISTER_1_YEAR, REGISTER_LEAP_YEAR = REGISTER_1_YEAR,
+ REGISTER_10_YEAR,
+ REGISTER_MODE,
+ REGISTER_TEST,
+ REGISTER_RESET
+};
+
+
+// register write mask
+static const int REGISTER_WRITE_MASK[2][16] =
+{
+ { 0xf, 0x7, 0xf, 0x7, 0xf, 0x3, 0x7, 0xf, 0x3, 0xf, 0x1, 0xf, 0xf, 0xf, 0xf, 0xf },
+ { 0x0, 0x0, 0xf, 0x7, 0xf, 0x3, 0x7, 0xf, 0x3, 0x0, 0x1, 0x3, 0x0, 0xf, 0xf, 0xf }
+};
+
+
+// days per month
+static const int DAYS_PER_MONTH[12] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
+
+
+// modes
+enum
+{
+ MODE00 = 0,
+ MODE01,
+ BLOCK10,
+ BLOCK11
+};
+
+
+// mode register
+#define MODE_MASK 0x03
+#define MODE_ALARM_EN 0x04
+#define MODE_TIMER_EN 0x08
+
+
+// test register
+#define TEST_0 0x01
+#define TEST_1 0x02
+#define TEST_2 0x04
+#define TEST_3 0x08
+
+
+// reset register
+#define RESET_ALARM 0x01
+#define RESET_TIMER 0x02
+#define RESET_16_HZ 0x04
+#define RESET_1_HZ 0x08
+
+
+
+//**************************************************************************
+// INLINE HELPERS
+//**************************************************************************
+
+//-------------------------------------------------
+// set_alarm_line -
+//-------------------------------------------------
+
+inline void rp5c01_device::set_alarm_line()
+{
+ int alarm = ((m_mode & MODE_ALARM_EN) ? m_alarm_on : 1) &
+ ((m_reset & RESET_16_HZ) ? 1 : m_16hz) &
+ ((m_reset & RESET_1_HZ) ? 1 : m_1hz);
+
+ if (m_alarm != alarm)
+ {
+ if (LOG) logerror("RP5C01 '%s' Alarm %u\n", tag(), alarm);
+
+ m_out_alarm_func(alarm);
+ m_alarm = alarm;
+ }
+}
+
+
+//-------------------------------------------------
+// read_counter -
+//-------------------------------------------------
+
+inline int rp5c01_device::read_counter(int counter)
+{
+ return (m_reg[MODE00][counter + 1] * 10) + m_reg[MODE00][counter];
+}
+
+
+//-------------------------------------------------
+// write_counter -
+//-------------------------------------------------
+
+inline void rp5c01_device::write_counter(int counter, int value)
+{
+ m_reg[MODE00][counter] = value % 10;
+ m_reg[MODE00][counter + 1] = value / 10;
+}
+
+
+//-------------------------------------------------
+// advance_seconds -
+//-------------------------------------------------
+
+inline void rp5c01_device::advance_seconds()
+{
+ int seconds = read_counter(REGISTER_1_SECOND);
+
+ seconds++;
+
+ if (seconds > 59)
+ {
+ seconds = 0;
+
+ advance_minutes();
+ }
+
+ write_counter(REGISTER_1_SECOND, seconds);
+}
+
+
+//-------------------------------------------------
+// advance_minutes -
+//-------------------------------------------------
+
+inline void rp5c01_device::advance_minutes()
+{
+ int minutes = read_counter(REGISTER_1_MINUTE);
+ int hours = read_counter(REGISTER_1_HOUR);
+ int days = read_counter(REGISTER_1_DAY);
+ int month = read_counter(REGISTER_1_MONTH);
+ int year = read_counter(REGISTER_1_YEAR);
+ int day_of_week = m_reg[MODE00][REGISTER_DAY_OF_THE_WEEK];
+
+ minutes++;
+
+ if (minutes > 59)
+ {
+ minutes = 0;
+ hours++;
+ }
+
+ if (hours > 23)
+ {
+ hours = 0;
+ days++;
+ day_of_week++;
+ }
+
+ if (day_of_week > 6)
+ {
+ day_of_week++;
+ }
+
+ if (days > DAYS_PER_MONTH[month - 1])
+ {
+ days = 1;
+ month++;
+ }
+
+ if (month > 12)
+ {
+ month = 1;
+ year++;
+ m_reg[MODE01][REGISTER_LEAP_YEAR]++;
+ m_reg[MODE01][REGISTER_LEAP_YEAR] &= 0x03;
+ }
+
+ if (year > 99)
+ {
+ year = 0;
+ }
+
+ write_counter(REGISTER_1_MINUTE, minutes);
+ write_counter(REGISTER_1_HOUR, hours);
+ write_counter(REGISTER_1_DAY, days);
+ write_counter(REGISTER_1_MONTH, month);
+ write_counter(REGISTER_1_YEAR, year);
+ m_reg[MODE00][REGISTER_DAY_OF_THE_WEEK] = day_of_week;
+
+ check_alarm();
+ set_alarm_line();
+}
+
+
+//-------------------------------------------------
+// adjust_seconds -
+//-------------------------------------------------
+
+inline void rp5c01_device::adjust_seconds()
+{
+ int seconds = read_counter(REGISTER_1_SECOND);
+
+ if (seconds < 30)
+ {
+ write_counter(REGISTER_1_SECOND, 0);
+ }
+ else
+ {
+ write_counter(REGISTER_1_SECOND, 0);
+ advance_minutes();
+ }
+}
+
+
+//-------------------------------------------------
+// check_alarm -
+//-------------------------------------------------
+
+inline void rp5c01_device::check_alarm()
+{
+ bool all_match = true;
+ bool all_zeroes = true;
+
+ for (int i = REGISTER_1_MINUTE; i < REGISTER_1_MONTH; i++)
+ {
+ if (m_reg[MODE01][i] != 0) all_zeroes = false;
+ if (m_reg[MODE01][i] != m_reg[MODE00][i]) all_match = false;
+ }
+
+ m_alarm_on = (all_match || (!m_alarm_on && all_zeroes)) ? 0 : 1;
+}
+
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// rp5c01_device - constructor
+//-------------------------------------------------
+
+rp5c01_device::rp5c01_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : device_t(mconfig, RP5C01, "RP5C01", tag, owner, clock),
+ device_rtc_interface(mconfig, *this),
+ device_nvram_interface(mconfig, *this),
+ m_alarm(1),
+ m_alarm_on(1),
+ m_1hz(1),
+ m_16hz(1)
+{
+}
+
+
+//-------------------------------------------------
+// device_config_complete - perform any
+// operations now that the configuration is
+// complete
+//-------------------------------------------------
+
+void rp5c01_device::device_config_complete()
+{
+ // inherit a copy of the static data
+ const rp5c01_interface *intf = reinterpret_cast<const rp5c01_interface *>(static_config());
+ if (intf != NULL)
+ *static_cast<rp5c01_interface *>(this) = *intf;
+
+ // or initialize to defaults if none provided
+ else
+ {
+ memset(&m_out_alarm_cb, 0, sizeof(m_out_alarm_cb));
+ }
+}
+
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void rp5c01_device::device_start()
+{
+ // resolve callbacks
+ m_out_alarm_func.resolve(m_out_alarm_cb, *this);
+
+ // allocate timers
+ m_clock_timer = timer_alloc(TIMER_CLOCK);
+ m_clock_timer->adjust(attotime::from_hz(clock() / 16384), 0, attotime::from_hz(clock() / 16384));
+
+ m_16hz_timer = timer_alloc(TIMER_16HZ);
+ m_16hz_timer->adjust(attotime::from_hz(clock() / 1024), 0, attotime::from_hz(clock() / 1024));
+
+ // state saving
+ save_item(NAME(m_reg[MODE00]));
+ save_item(NAME(m_reg[MODE01]));
+ save_item(NAME(m_mode));
+ save_item(NAME(m_reset));
+ save_item(NAME(m_alarm));
+ save_item(NAME(m_alarm_on));
+ save_item(NAME(m_1hz));
+ save_item(NAME(m_16hz));
+}
+
+
+//-------------------------------------------------
+// device_timer - handler timer events
+//-------------------------------------------------
+
+void rp5c01_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
+{
+ switch (id)
+ {
+ case TIMER_CLOCK:
+ if (m_1hz && (m_mode & MODE_TIMER_EN))
+ {
+ advance_seconds();
+ }
+
+ m_1hz = !m_1hz;
+ set_alarm_line();
+ break;
+
+ case TIMER_16HZ:
+ m_16hz = !m_16hz;
+ set_alarm_line();
+ break;
+ }
+}
+
+
+//-------------------------------------------------
+// rtc_set_time - called to initialize the RTC to
+// a known state
+//-------------------------------------------------
+
+void rp5c01_device::rtc_set_time(int year, int month, int day, int day_of_week, int hour, int minute, int second)
+{
+ write_counter(REGISTER_1_YEAR, year);
+ write_counter(REGISTER_1_MONTH, month);
+ write_counter(REGISTER_1_DAY, day);
+ m_reg[MODE00][REGISTER_DAY_OF_THE_WEEK] = day_of_week;
+ write_counter(REGISTER_1_HOUR, hour);
+ write_counter(REGISTER_1_MINUTE, minute);
+ write_counter(REGISTER_1_SECOND, second);
+}
+
+
+//-------------------------------------------------
+// nvram_default - called to initialize NVRAM to
+// its default state
+//-------------------------------------------------
+
+void rp5c01_device::nvram_default()
+{
+}
+
+
+//-------------------------------------------------
+// nvram_read - called to read NVRAM from the
+// .nv file
+//-------------------------------------------------
+
+void rp5c01_device::nvram_read(emu_file &file)
+{
+ file.read(m_ram, RAM_SIZE);
+}
+
+
+//-------------------------------------------------
+// nvram_write - called to write NVRAM to the
+// .nv file
+//-------------------------------------------------
+
+void rp5c01_device::nvram_write(emu_file &file)
+{
+ file.write(m_ram, RAM_SIZE);
+}
+
+
+//-------------------------------------------------
+// adj_w -
+//-------------------------------------------------
+
+WRITE_LINE_MEMBER( rp5c01_device::adj_w )
+{
+ if (state)
+ {
+ adjust_seconds();
+ }
+}
+
+
+//-------------------------------------------------
+// read -
+//-------------------------------------------------
+
+READ8_MEMBER( rp5c01_device::read )
+{
+ UINT8 data = 0;
+
+ switch (offset & 0x0f)
+ {
+ case REGISTER_MODE:
+ data = m_mode;
+ break;
+
+ case REGISTER_TEST:
+ case REGISTER_RESET:
+ // write only
+ break;
+
+ default:
+ data = m_reg[m_mode & MODE_MASK][offset];
+ break;
+ }
+
+ if (LOG) logerror("RP5C01 '%s' Register %u Read %02x\n", tag(), offset & 0x0f, data);
+
+ return data & 0x0f;
+}
+
+
+//-------------------------------------------------
+// write -
+//-------------------------------------------------
+
+WRITE8_MEMBER( rp5c01_device::write )
+{
+ int mode = m_mode & MODE_MASK;
+
+ switch (offset & 0x0f)
+ {
+ case REGISTER_MODE:
+ m_mode = data & 0x0f;
+
+ if (LOG)
+ {
+ logerror("RP5C01 '%s' Mode %u\n", tag(), data & MODE_MASK);
+ logerror("RP5C01 '%s' Timer %s\n", tag(), (data & MODE_TIMER_EN) ? "enabled" : "disabled");
+ logerror("RP5C01 '%s' Alarm %s\n", tag(), (data & MODE_ALARM_EN) ? "enabled" : "disabled");
+ }
+ break;
+
+ case REGISTER_TEST:
+ if (LOG) logerror("RP5C01 '%s' Test %u not supported!\n", tag(), data);
+ break;
+
+ case REGISTER_RESET:
+ m_reset = data & 0x0f;
+
+ if (data & RESET_ALARM)
+ {
+ int i;
+
+ // reset alarm registers
+ for (i = REGISTER_1_MINUTE; i < REGISTER_1_MONTH; i++)
+ {
+ m_reg[MODE01][i] = 0;
+ }
+ }
+
+ if (LOG)
+ {
+ if (data & RESET_ALARM) logerror("RP5C01 '%s' Alarm Reset\n", tag());
+ if (data & RESET_TIMER) logerror("RP5C01 '%s' Timer Reset not supported!\n", tag());
+ logerror("RP5C01 '%s' 16Hz Signal %s\n", tag(), (data & RESET_16_HZ) ? "disabled" : "enabled");
+ logerror("RP5C01 '%s' 1Hz Signal %s\n", tag(), (data & RESET_1_HZ) ? "disabled" : "enabled");
+ }
+ break;
+
+ default:
+ switch (mode)
+ {
+ case MODE00:
+ case MODE01:
+ m_reg[mode][offset & 0x0f] = data & REGISTER_WRITE_MASK[mode][offset & 0x0f];
+ break;
+
+ case BLOCK10:
+ m_ram[offset & 0x0f] = (m_ram[offset & 0x0f] & 0xf0) | (data & 0x0f);
+ break;
+
+ case BLOCK11:
+ m_ram[offset & 0x0f] = (data << 4) | (m_ram[offset & 0x0f] & 0x0f);
+ break;
+ }
+
+ if (LOG) logerror("RP5C01 '%s' Register %u Write %02x\n", tag(), offset & 0x0f, data);
+ break;
+ }
+}