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-rw-r--r--src/devices/machine/icm7170.cpp201
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diff --git a/src/devices/machine/icm7170.cpp b/src/devices/machine/icm7170.cpp
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+// license:BSD-3-Clause
+// copyright-holders:R. Belmont
+/**********************************************************************
+
+ Intersil/Renesas ICM7170 Real Time Clock
+
+*********************************************************************/
+
+#include "emu.h"
+#include "icm7170.h"
+#include "coreutil.h"
+
+#define VERBOSE (1)
+#include "logmacro.h"
+
+DEFINE_DEVICE_TYPE(ICM7170, icm7170_device, "icm7170", "Intersil/Renesas ICM7170 Real Time Clock")
+
+// internal registers
+enum
+{
+ REG_CNT_100TH_SEC = 0,
+ REG_CNT_HOURS,
+ REG_CNT_MINUTES,
+ REG_CNT_SECONDS,
+ REG_CNT_MONTH,
+ REG_CNT_DAY,
+ REG_CNT_YEAR,
+ REG_CNT_DAY_OF_WEEK,
+ REG_RAM_100TH_SEC,
+ REG_RAM_HOURS,
+ REG_RAM_MINUTES,
+ REG_RAM_SECONDS,
+ REG_RAM_MONTH,
+ REG_RAM_DAY,
+ REG_RAM_YEAR,
+ REG_RAM_DAY_OF_WEEK,
+ REG_INT_STATUS_AND_MASK,
+ REG_COMMAND
+};
+
+enum
+{
+ CMD_REG_TEST_MODE = 0x20,
+ CMD_REG_IRQ_ENABLE = 0x10,
+ CMD_REG_RUN = 0x08,
+ CMD_REG_24_HOUR = 0x04,
+ CMD_REG_FREQ_MASK = 0x03
+};
+
+enum
+{
+ IRQ_BIT_GLOBAL = 0x80,
+ IRQ_BIT_DAY = 0x40,
+ IRQ_BIT_HOUR = 0x20,
+ IRQ_BIT_MINUTE = 0x10,
+ IRQ_BIT_SECOND = 0x08,
+ IRQ_BIT_10TH_SECOND = 0x04,
+ IRQ_BIT_100TH_SECOND = 0x02,
+ IRQ_BIT_ALARM = 0x01
+};
+
+static constexpr int ICM7170_TIMER_ID = 0;
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// icm7170_device - constructor
+//-------------------------------------------------
+
+icm7170_device::icm7170_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
+ : device_t(mconfig, ICM7170, tag, owner, clock),
+ device_rtc_interface(mconfig, *this),
+ device_nvram_interface(mconfig, *this),
+ m_out_irq_cb(*this)
+{
+}
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void icm7170_device::device_start()
+{
+ // resolve callbacks
+ m_out_irq_cb.resolve_safe();
+
+ m_timer = timer_alloc(ICM7170_TIMER_ID);
+ m_timer->adjust(attotime::never);
+
+ save_item(NAME(m_regs));
+}
+
+//-------------------------------------------------
+// device_reset - device-specific reset handling
+//-------------------------------------------------
+
+void icm7170_device::device_reset()
+{
+ m_regs[REG_COMMAND] &= ~CMD_REG_RUN;
+ m_irq_status = 0;
+ recalc_irqs();
+}
+
+//-------------------------------------------------
+// device_timer - handles timer events
+//-------------------------------------------------
+
+void icm7170_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
+{
+}
+
+
+//-------------------------------------------------
+// rtc_clock_updated - called when the host time changes
+//-------------------------------------------------
+
+void icm7170_device::rtc_clock_updated(int year, int month, int day, int day_of_week, int hour, int minute, int second)
+{
+ if (m_regs[REG_COMMAND] & CMD_REG_RUN)
+ {
+ m_regs[REG_CNT_YEAR] = year % 99;
+ m_regs[REG_CNT_MONTH] = month;
+ m_regs[REG_CNT_DAY] = day;
+ m_regs[REG_CNT_DAY_OF_WEEK] = day_of_week;
+ m_regs[REG_CNT_HOURS] = hour;
+ m_regs[REG_CNT_MINUTES] = minute;
+ m_regs[REG_CNT_SECONDS] = second;
+ }
+}
+
+
+//-------------------------------------------------
+// nvram_default - called to initialize NVRAM to
+// its default state
+//-------------------------------------------------
+
+void icm7170_device::nvram_default()
+{
+ memset(m_regs, 0, 0x20);
+}
+
+
+//-------------------------------------------------
+// nvram_read - called to read NVRAM from the
+// .nv file
+//-------------------------------------------------
+
+void icm7170_device::nvram_read(emu_file &file)
+{
+ file.read(m_regs, 0x20);
+}
+
+
+//-------------------------------------------------
+// nvram_write - called to write NVRAM to the
+// .nv file
+//-------------------------------------------------
+
+void icm7170_device::nvram_write(emu_file &file)
+{
+ file.write(m_regs, 0x20);
+}
+
+// non-inherited device functions
+uint8_t icm7170_device::read(offs_t offset)
+{
+ uint8_t data = m_regs[offset & 0x1f];
+
+ if ((offset & 0x1f) == REG_INT_STATUS_AND_MASK)
+ {
+ data = m_irq_status;
+ }
+
+ LOG("ICM7170 Register %d Read %02x\n", offset, data);
+
+ return data;
+}
+
+void icm7170_device::write(offs_t offset, uint8_t data)
+{
+ switch (offset & 0x1f)
+ {
+ case REG_INT_STATUS_AND_MASK:
+ m_irq_mask = data;
+ LOG("ICM7170 IRQ Mask Write %02x\n", data);
+ recalc_irqs();
+ break;
+
+ default:
+ m_regs[offset & 0x1f] = data;
+ LOG("ICM7170 Register %d Write %02x\n", offset & 0x1f, data);
+ break;
+ }
+}
+
+void icm7170_device::recalc_irqs()
+{
+}
+