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-rw-r--r--src/devices/bus/dmv/k803.cpp133
1 files changed, 133 insertions, 0 deletions
diff --git a/src/devices/bus/dmv/k803.cpp b/src/devices/bus/dmv/k803.cpp
new file mode 100644
index 00000000000..7f748cc4806
--- /dev/null
+++ b/src/devices/bus/dmv/k803.cpp
@@ -0,0 +1,133 @@
+// license:BSD-3-Clause
+// copyright-holders:Sandro Ronco
+/***************************************************************************
+
+ K803 RTC module
+
+***************************************************************************/
+
+#include "emu.h"
+#include "k803.h"
+
+
+/***************************************************************************
+ IMPLEMENTATION
+***************************************************************************/
+
+static MACHINE_CONFIG_FRAGMENT( dmv_k803 )
+ MCFG_DEVICE_ADD("rtc", MM58167, XTAL_32_768kHz)
+ MCFG_MM58167_IRQ_CALLBACK(WRITELINE(dmv_k803_device, rtc_irq_w))
+MACHINE_CONFIG_END
+
+static INPUT_PORTS_START( dmv_k803 )
+ PORT_START("DSW")
+ PORT_DIPNAME( 0x0f, 0x09, "K803 IFSEL" ) PORT_DIPLOCATION("S:!4,S:!3,S:!2,S:!1")
+ PORT_DIPSETTING( 0x00, "0A" )
+ PORT_DIPSETTING( 0x01, "0B" )
+ PORT_DIPSETTING( 0x02, "1A" )
+ PORT_DIPSETTING( 0x03, "1B" )
+ PORT_DIPSETTING( 0x04, "2A" )
+ PORT_DIPSETTING( 0x05, "2B" )
+ PORT_DIPSETTING( 0x06, "3A" )
+ PORT_DIPSETTING( 0x07, "3B" )
+ PORT_DIPSETTING( 0x08, "4A" )
+ PORT_DIPSETTING( 0x09, "4B" ) // default
+INPUT_PORTS_END
+
+//**************************************************************************
+// GLOBAL VARIABLES
+//**************************************************************************
+
+const device_type DMV_K803 = &device_creator<dmv_k803_device>;
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// dmv_k803_device - constructor
+//-------------------------------------------------
+
+dmv_k803_device::dmv_k803_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : device_t(mconfig, DMV_K803, "K803 RTC", tag, owner, clock, "dmv_k803", __FILE__),
+ device_dmvslot_interface( mconfig, *this ),
+ m_rtc(*this, "rtc"),
+ m_dsw(*this, "DSW")
+{
+}
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void dmv_k803_device::device_start()
+{
+ m_bus = static_cast<dmvcart_slot_device*>(owner());
+}
+
+//-------------------------------------------------
+// device_reset - device-specific reset
+//-------------------------------------------------
+
+void dmv_k803_device::device_reset()
+{
+ m_latch = 0;
+ m_rtc_int = CLEAR_LINE;
+}
+
+//-------------------------------------------------
+// machine_config_additions - device-specific
+// machine configurations
+//-------------------------------------------------
+
+machine_config_constructor dmv_k803_device::device_mconfig_additions() const
+{
+ return MACHINE_CONFIG_NAME( dmv_k803 );
+}
+
+//-------------------------------------------------
+// input_ports - device-specific input ports
+//-------------------------------------------------
+
+ioport_constructor dmv_k803_device::device_input_ports() const
+{
+ return INPUT_PORTS_NAME( dmv_k803 );
+}
+
+void dmv_k803_device::io_read(address_space &space, int ifsel, offs_t offset, UINT8 &data)
+{
+ UINT8 dsw = m_dsw->read() & 0x0f;
+ if ((dsw >> 1) == ifsel && BIT(offset, 3) == BIT(dsw, 0))
+ {
+ if (offset & 0x04)
+ data = m_rtc->read(space, ((m_latch & 0x07) << 2) | (offset & 0x03));
+ }
+}
+
+void dmv_k803_device::io_write(address_space &space, int ifsel, offs_t offset, UINT8 data)
+{
+ UINT8 dsw = m_dsw->read() & 0x0f;
+ if ((dsw >> 1) == ifsel && BIT(offset, 3) == BIT(dsw, 0))
+ {
+ if (offset & 0x04)
+ m_rtc->write(space, ((m_latch & 0x07) << 2) | (offset & 0x03), data);
+ else
+ {
+ m_latch = data;
+ update_int();
+ }
+ }
+}
+
+WRITE_LINE_MEMBER(dmv_k803_device::rtc_irq_w)
+{
+ m_rtc_int = state;
+ update_int();
+}
+
+void dmv_k803_device::update_int()
+{
+ bool state = ((m_latch & 0x80) && m_rtc_int);
+ m_bus->m_out_int_cb(state ? ASSERT_LINE : CLEAR_LINE);
+}