added lcd driver

src/emu/cpu/sm510/sm510.c

@@ -12,6 +12,7 @@
   
   TODO:
   - proper support for LFSR program counter in debugger
+  - callback for lcd screen as MAME bitmap (when needed)
 
 */
 
@@ -36,9 +37,6 @@ void sm510_base_device::device_start()
 	m_prgmask = (1 << m_prgwidth) - 1;
 	m_datamask = (1 << m_datawidth) - 1;
 
-	m_div_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(sm510_base_device::div_timer_cb), this));
-	reset_divider();
-
 	// resolve callbacks
 	m_read_k.resolve_safe(0);
 	m_read_ba.resolve_safe(1);
@@ -46,6 +44,10 @@ void sm510_base_device::device_start()
 	m_write_s.resolve_safe();
 	m_write_r.resolve_safe();
 
+	m_write_sega.resolve_safe();
+	m_write_segb.resolve_safe();
+	m_write_segc.resolve_safe();
+
 	// zerofill
 	memset(m_stack, 0, sizeof(m_stack));
 	m_pc = 0;
@@ -59,7 +61,7 @@ void sm510_base_device::device_start()
 	m_c = 0;
 	m_skip = false;
 	m_w = 0;
-//	m_div = 0;
+	m_div = 0;
 	m_1s = false;
 	m_k_active = false;
 	m_bp = false;
@@ -98,6 +100,9 @@ void sm510_base_device::device_start()
 	state_add(STATE_GENFLAGS, "GENFLAGS", m_c).formatstr("%1s").noshow();
 
 	m_icountptr = &m_icount;
+
+	init_divider();
+	init_lcd_driver();
 }
 
 
@@ -124,6 +129,45 @@ void sm510_base_device::device_reset()
 
 
 
+//-------------------------------------------------
+//  lcd driver
+//-------------------------------------------------
+
+inline UINT16 sm510_base_device::get_lcd_row(int column, UINT8* ram)
+{
+	// output 0 if lcd blackpate/bleeder is off, or in case row doesn't exist
+	if (ram == NULL || m_bc || !m_bp)
+		return 0;
+	
+	UINT16 rowdata = 0;
+	for (int i = 0; i < 0x10; i++)
+		rowdata |= (ram[i] >> column & 1) << i;
+	
+	return rowdata;
+}
+
+TIMER_CALLBACK_MEMBER(sm510_base_device::lcd_timer_cb)
+{
+	// 4 columns, 16 segments per row
+	for (int h = 0; h < 4; h++)
+	{
+		m_write_sega(h | SM510_PORT_SEGA, get_lcd_row(h, m_lcd_ram_a), 0xffff);
+		m_write_segb(h | SM510_PORT_SEGB, get_lcd_row(h, m_lcd_ram_b), 0xffff);
+		m_write_segc(h | SM510_PORT_SEGC, get_lcd_row(h, m_lcd_ram_c), 0xffff);
+	}
+	
+	// schedule next timeout
+	m_lcd_timer->adjust(attotime::from_ticks(0x200, unscaled_clock()));
+}
+
+void sm510_base_device::init_lcd_driver()
+{
+	m_lcd_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(sm510_base_device::lcd_timer_cb), this));
+	m_lcd_timer->adjust(attotime::from_ticks(0x200, unscaled_clock())); // 64hz default
+}
+
+
+
 //-------------------------------------------------
 //  interrupt/timer
 //-------------------------------------------------
@@ -175,6 +219,12 @@ void sm510_base_device::reset_divider()
 	m_div_timer->adjust(attotime::from_ticks(0x800, unscaled_clock()));
 }
 
+void sm510_base_device::init_divider()
+{
+	m_div_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(sm510_base_device::div_timer_cb), this));
+	reset_divider();
+}
+
 
 
 //-------------------------------------------------

src/emu/cpu/sm510/sm510.h

@@ -17,6 +17,9 @@
 // 4-bit K input port (pull-down)
 #define MCFG_SM510_READ_K_CB(_devcb) \
 	sm510_base_device::set_read_k_callback(*device, DEVCB_##_devcb);
+// when in halt state, any K input going High can wake up the CPU,
+// driver is required to use execute_set_input(SM510_INPUT_LINE_K, state)
+#define SM510_INPUT_LINE_K 0
 
 // 1-bit BA input pin (pull-up)
 #define MCFG_SM510_READ_BA_CB(_devcb) \
@@ -34,9 +37,20 @@
 #define MCFG_SM510_WRITE_R_CB(_devcb) \
 	sm510_base_device::set_write_r_callback(*device, DEVCB_##_devcb);
 
-// when in halt state, any K input going High can wake up the CPU,
+// LCD segment outputs: H1-4 as offset(low), a/b/c 1-16 as data d0-d15
-// driver is required to use execute_set_input(SM510_INPUT_LINE_K, state)
+#define MCFG_SM510_WRITE_SEGA_CB(_devcb) \
-#define SM510_INPUT_LINE_K 0
+	sm510_base_device::set_write_sega_callback(*device, DEVCB_##_devcb);
+#define MCFG_SM510_WRITE_SEGB_CB(_devcb) \
+	sm510_base_device::set_write_segb_callback(*device, DEVCB_##_devcb);
+#define MCFG_SM510_WRITE_SEGC_CB(_devcb) \
+	sm510_base_device::set_write_segc_callback(*device, DEVCB_##_devcb);
+
+enum
+{
+	SM510_PORT_SEGA = 0x10,
+	SM510_PORT_SEGB = 0x20,
+	SM510_PORT_SEGC = 0x30
+};
 
 
 // pinout reference
@@ -53,13 +67,13 @@ public:
 		: cpu_device(mconfig, type, name, tag, owner, clock, shortname, source)
 		, m_program_config("program", ENDIANNESS_LITTLE, 8, prgwidth, 0, program)
 		, m_data_config("data", ENDIANNESS_LITTLE, 8, datawidth, 0, data)
-		, m_lcd_ram(*this, "lcd_ram")
 		, m_prgwidth(prgwidth)
 		, m_datawidth(datawidth)
 		, m_stack_levels(stack_levels)
+		, m_lcd_ram_a(*this, "lcd_ram_a"), m_lcd_ram_b(*this, "lcd_ram_b"), m_lcd_ram_c(*this, "lcd_ram_c")
+		, m_write_sega(*this), m_write_segb(*this), m_write_segc(*this)
 		, m_read_k(*this)
-		, m_read_ba(*this)
+		, m_read_ba(*this), m_read_b(*this)
-		, m_read_b(*this)
 		, m_write_s(*this)
 		, m_write_r(*this)
 	{ }
@@ -71,6 +85,10 @@ public:
 	template<class _Object> static devcb_base &set_write_s_callback(device_t &device, _Object object) { return downcast<sm510_base_device &>(device).m_write_s.set_callback(object); }
 	template<class _Object> static devcb_base &set_write_r_callback(device_t &device, _Object object) { return downcast<sm510_base_device &>(device).m_write_r.set_callback(object); }
 
+	template<class _Object> static devcb_base &set_write_sega_callback(device_t &device, _Object object) { return downcast<sm510_base_device &>(device).m_write_sega.set_callback(object); }
+	template<class _Object> static devcb_base &set_write_segb_callback(device_t &device, _Object object) { return downcast<sm510_base_device &>(device).m_write_segb.set_callback(object); }
+	template<class _Object> static devcb_base &set_write_segc_callback(device_t &device, _Object object) { return downcast<sm510_base_device &>(device).m_write_segc.set_callback(object); }
+
 protected:
 	// device-level overrides
 	virtual void device_start();
@@ -97,7 +115,6 @@ protected:
 	address_space_config m_data_config;
 	address_space *m_program;
 	address_space *m_data;
-	required_shared_ptr<UINT8> m_lcd_ram;
 
 	int m_prgwidth;
 	int m_datawidth;
@@ -110,7 +127,6 @@ protected:
 	int m_stack_levels;
 	UINT16 m_stack[2];
 	int m_icount;
-	emu_timer *m_div_timer;
 	
 	UINT8 m_acc;
 	UINT8 m_bl;
@@ -118,14 +134,31 @@ protected:
 	UINT8 m_c;
 	bool m_skip;
 	UINT8 m_w;
-	UINT16 m_div;
-	bool m_1s;
 	bool m_k_active;
-	bool m_bp;
-	bool m_bc;
 	bool m_halt;
 
-	// i/o handlers
+	// lcd driver
+	optional_shared_ptr<UINT8> m_lcd_ram_a, m_lcd_ram_b, m_lcd_ram_c;
+	devcb_write16 m_write_sega, m_write_segb, m_write_segc;
+	emu_timer *m_lcd_timer;
+	bool m_bp;
+	bool m_bc;
+
+	UINT16 get_lcd_row(int column, UINT8* ram);
+	TIMER_CALLBACK_MEMBER(lcd_timer_cb);
+	virtual void init_lcd_driver();
+
+	// clock divider
+	emu_timer *m_div_timer;
+	UINT16 m_div;
+	bool m_1s;
+
+	TIMER_CALLBACK_MEMBER(div_timer_cb);
+	void wake_me_up();
+	virtual void reset_divider();
+	void init_divider();
+
+	// other i/o handlers
 	devcb_read8 m_read_k;
 	devcb_read_line m_read_ba;
 	devcb_read_line m_read_b;
@@ -134,9 +167,6 @@ protected:
 
 	// misc internal helpers
 	void increment_pc();
-	TIMER_CALLBACK_MEMBER(div_timer_cb);
-	void wake_me_up();
-	virtual void reset_divider();
 	virtual void get_opcode_param() { } // -> child class
 
 	UINT8 ram_r();

src/emu/cpu/sm510/sm510core.c

@@ -24,7 +24,8 @@ ADDRESS_MAP_END
 
 static ADDRESS_MAP_START(data_96_32x4, AS_DATA, 8, sm510_base_device)
 	AM_RANGE(0x00, 0x5f) AM_RAM
-	AM_RANGE(0x60, 0x7f) AM_RAM AM_SHARE("lcd_ram")
+	AM_RANGE(0x60, 0x6f) AM_RAM AM_SHARE("lcd_ram_a")
+	AM_RANGE(0x70, 0x7f) AM_RAM AM_SHARE("lcd_ram_b")
 ADDRESS_MAP_END
 
 

src/emu/cpu/sm510/sm511core.c

@@ -22,12 +22,15 @@ ADDRESS_MAP_END
 
 static ADDRESS_MAP_START(data_96_32x4, AS_DATA, 8, sm510_base_device)
 	AM_RANGE(0x00, 0x5f) AM_RAM
-	AM_RANGE(0x60, 0x7f) AM_RAM AM_SHARE("lcd_ram")
+	AM_RANGE(0x60, 0x6f) AM_RAM AM_SHARE("lcd_ram_a")
+	AM_RANGE(0x70, 0x7f) AM_RAM AM_SHARE("lcd_ram_b")
 ADDRESS_MAP_END
 
 static ADDRESS_MAP_START(data_80_48x4, AS_DATA, 8, sm510_base_device)
 	AM_RANGE(0x00, 0x4f) AM_RAM
-	AM_RANGE(0x50, 0x7f) AM_RAM AM_SHARE("lcd_ram")
+	AM_RANGE(0x50, 0x5f) AM_RAM AM_SHARE("lcd_ram_c")
+	AM_RANGE(0x60, 0x6f) AM_RAM AM_SHARE("lcd_ram_a")
+	AM_RANGE(0x70, 0x7f) AM_RAM AM_SHARE("lcd_ram_b")
 ADDRESS_MAP_END