machine/rp5c01.cpp, seibu/banprestoms.cpp: add preliminary Sharp LH5045 RTC device

src/devices/machine/rp5c01.cpp

@@ -13,6 +13,8 @@
     - 12 hour clock
     - test register
     - timer reset
+    - convert I/O to address maps & views
+    - lh5045 doesn't really wrap time correctly
 
 */
 
@@ -23,6 +25,7 @@
 // device type definitions
 DEFINE_DEVICE_TYPE(RP5C01, rp5c01_device, "rp5c01", "Ricoh RP5C01 RTC")
 DEFINE_DEVICE_TYPE(TC8521, tc8521_device, "tc8521", "Toshiba TC8521 RTC")
+DEFINE_DEVICE_TYPE(LH5045, lh5045_device, "lh5045", "Sharp LH5045 RTC")
 
 
 //**************************************************************************
@@ -432,3 +435,22 @@ tc8521_device::tc8521_device(const machine_config &mconfig, const char *tag, dev
 	: rp5c01_device(mconfig, TC8521, tag, owner, clock)
 {
 }
+
+//-------------------------------------------------
+//  lh5045_device - constructor
+//-------------------------------------------------
+
+lh5045_device::lh5045_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
+	: rp5c01_device(mconfig, LH5045, tag, owner, clock)
+{
+}
+
+TIMER_CALLBACK_MEMBER(lh5045_device::advance_1hz_clock)
+{
+	// inverted & different bit compared to rp5c01
+	if (m_1hz && (!BIT(m_mode, 2)))
+		advance_seconds();
+
+	m_1hz = !m_1hz;
+	set_alarm_line();
+}

src/devices/machine/rp5c01.h

@@ -65,11 +65,11 @@ protected:
 	virtual bool nvram_read(util::read_stream &file) override;
 	virtual bool nvram_write(util::write_stream &file) override;
 
-	TIMER_CALLBACK_MEMBER(advance_1hz_clock);
+	virtual TIMER_CALLBACK_MEMBER(advance_1hz_clock);
 	TIMER_CALLBACK_MEMBER(advance_16hz_clock);
 
-private:
 	inline void set_alarm_line();
+private:
 	inline int read_counter(int counter);
 	inline void write_counter(int counter, int value);
 	inline void check_alarm();
@@ -77,6 +77,7 @@ private:
 	devcb_write_line m_out_alarm_cb;
 	bool m_battery_backed;
 
+protected:
 	uint8_t m_reg[2][13];         // clock registers
 	uint8_t m_ram[13];            // RAM
 
@@ -87,6 +88,7 @@ private:
 	int m_1hz;                  // 1 Hz condition
 	int m_16hz;                 // 16 Hz condition
 
+private:
 	// timers
 	emu_timer *m_clock_timer;
 	emu_timer *m_16hz_timer;
@@ -101,9 +103,19 @@ public:
 	tc8521_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
 };
 
+class lh5045_device : public rp5c01_device
+{
+public:
+	// construction/destruction
+	lh5045_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+
+private:
+	virtual TIMER_CALLBACK_MEMBER(advance_1hz_clock) override;
+};
 
 // device type definition
 DECLARE_DEVICE_TYPE(RP5C01, rp5c01_device)
 DECLARE_DEVICE_TYPE(TC8521, tc8521_device)
+DECLARE_DEVICE_TYPE(LH5045, lh5045_device)
 
 #endif // MAME_MACHINE_RP5C01_H

src/mame/seibu/banprestoms.cpp

@@ -41,6 +41,7 @@ TODO:
 
 #include "cpu/m68000/m68000.h"
 #include "machine/nvram.h"
+#include "machine/rp5c01.h"
 #include "machine/ticket.h"
 #include "sound/okim6295.h"
 
@@ -61,6 +62,7 @@ public:
 		, m_gfxdecode(*this, "gfxdecode")
 		, m_palette(*this, "palette")
 		, m_ticket(*this, "ticket")
+		, m_rtc(*this, "rtc")
 		, m_vram(*this, "vram%u", 0U)
 		, m_spriteram(*this, "sprite_ram")
 		, m_okibank(*this, "okibank")
@@ -79,6 +81,7 @@ private:
 	required_device<gfxdecode_device> m_gfxdecode;
 	required_device<palette_device> m_palette;
 	required_device<ticket_dispenser_device> m_ticket;
+	required_device<lh5045_device> m_rtc;
 
 	required_shared_ptr_array<uint16_t, 4> m_vram;
 	required_shared_ptr<uint16_t> m_spriteram;
@@ -260,21 +263,9 @@ void banprestoms_state::prg_map(address_map &map)
 	map(0x0e0002, 0x0e0003).portr("IN1");
 	map(0x0e0004, 0x0e0005).portr("IN2");
 
-	// Expects a '1' when entering RTC test (RTC ready line?)
+	// Expects a '1' when entering RTC test (RTC /BSY line?)
 	map(0x0e0006, 0x0e0007).lr8(NAME([](offs_t offset) { return 1; }));
-	/*
-	 * Unknown RTC type (service mode in tvdenwad -> first item)
-	 * 4-bit access, in lower/upper digit fashion
-	 * [0-2] seconds
-	 * [4-6] minutes
-	 * [8-a] hours
-	 * [c] weekday?
-	 * [e-0x10] day
-	 * [0x12-0x14] month
-	 * [0x16-0x18] year
-	 * [0x1a-0x1e] cleared on POST
-	 */
-//	map(0x100000, 0x10001f).ram();
+	map(0x100000, 0x10001f).rw(m_rtc, FUNC(lh5045_device::read), FUNC(lh5045_device::write)).umask16(0x00ff);
 }
 
 void banprestoms_state::oki_map(address_map &map)
@@ -285,6 +276,7 @@ void banprestoms_state::oki_map(address_map &map)
 
 static INPUT_PORTS_START( tvdenwad )
 	PORT_START("IN1")
+	// TODO: convert to keypad
 	PORT_BIT( 0x0001, IP_ACTIVE_LOW, IPT_BUTTON1 ) // 1
 	PORT_BIT( 0x0002, IP_ACTIVE_LOW, IPT_BUTTON2 ) // 2
 	PORT_BIT( 0x0004, IP_ACTIVE_LOW, IPT_BUTTON3 ) // 3
@@ -469,6 +461,8 @@ void banprestoms_state::banprestoms(machine_config &config)
 	crtc.layer_en_callback().set(FUNC(banprestoms_state::layer_en_w));
 	crtc.layer_scroll_callback().set(FUNC(banprestoms_state::layer_scroll_w));
 
+	LH5045(config, m_rtc, XTAL(32'768));
+
 	GFXDECODE(config, m_gfxdecode, m_palette, gfx_banprestoms);
 	PALETTE(config, m_palette).set_format(palette_device::xBGR_555, 0x400); // TODO: copied from other drivers using the same CRTC