diff --git a/scripts/src/cpu.lua b/scripts/src/cpu.lua
index c0ef6eac85d..ae338a86b75 100644
--- a/scripts/src/cpu.lua
+++ b/scripts/src/cpu.lua
@@ -2223,20 +2223,23 @@ end
 if CPUS["SM510"] then
 	files {
 		MAME_DIR .. "src/devices/cpu/sm510/sm510base.cpp",
+		MAME_DIR .. "src/devices/cpu/sm510/sm510base.h",
 		MAME_DIR .. "src/devices/cpu/sm510/sm510.h",
+		MAME_DIR .. "src/devices/cpu/sm510/sm510.cpp",
 		MAME_DIR .. "src/devices/cpu/sm510/sm510op.cpp",
-		MAME_DIR .. "src/devices/cpu/sm510/sm510core.cpp",
-		MAME_DIR .. "src/devices/cpu/sm510/sm511core.cpp",
-		MAME_DIR .. "src/devices/cpu/sm510/sm530.h",
-		MAME_DIR .. "src/devices/cpu/sm510/sm530op.cpp",
-		MAME_DIR .. "src/devices/cpu/sm510/sm530core.cpp",
+		MAME_DIR .. "src/devices/cpu/sm510/sm511.h",
+		MAME_DIR .. "src/devices/cpu/sm510/sm511.cpp",
 		MAME_DIR .. "src/devices/cpu/sm510/sm500.h",
+		MAME_DIR .. "src/devices/cpu/sm510/sm500.cpp",
 		MAME_DIR .. "src/devices/cpu/sm510/sm500op.cpp",
-		MAME_DIR .. "src/devices/cpu/sm510/sm500core.cpp",
-		MAME_DIR .. "src/devices/cpu/sm510/sm5acore.cpp",
+		MAME_DIR .. "src/devices/cpu/sm510/sm5a.h",
+		MAME_DIR .. "src/devices/cpu/sm510/sm5a.cpp",
+		MAME_DIR .. "src/devices/cpu/sm510/sm530.h",
+		MAME_DIR .. "src/devices/cpu/sm510/sm530.cpp",
+		MAME_DIR .. "src/devices/cpu/sm510/sm530op.cpp",
 		MAME_DIR .. "src/devices/cpu/sm510/sm590.h",
+		MAME_DIR .. "src/devices/cpu/sm510/sm590.cpp",
 		MAME_DIR .. "src/devices/cpu/sm510/sm590op.cpp",
-		MAME_DIR .. "src/devices/cpu/sm510/sm590core.cpp",
 	}
 end
 
diff --git a/src/devices/cpu/pps41/pps41base.h b/src/devices/cpu/pps41/pps41base.h
index d531b77042b..2d962b5a5d3 100644
--- a/src/devices/cpu/pps41/pps41base.h
+++ b/src/devices/cpu/pps41/pps41base.h
@@ -4,6 +4,9 @@
 
   Rockwell PPS-4/1 MCU cores
 
+  Don't include this file, include the specific device header instead,
+  for example mm76.h
+
 */
 
 #ifndef MAME_CPU_PPS41_PPS41BASE_H
diff --git a/src/devices/cpu/sm510/sm500core.cpp b/src/devices/cpu/sm510/sm500.cpp
similarity index 97%
rename from src/devices/cpu/sm510/sm500core.cpp
rename to src/devices/cpu/sm510/sm500.cpp
index cd4bdd7e4c8..e9772a1780c 100644
--- a/src/devices/cpu/sm510/sm500core.cpp
+++ b/src/devices/cpu/sm510/sm500.cpp
@@ -147,17 +147,6 @@ void sm500_device::clock_melody()
 //  execute
 //-------------------------------------------------
 
-void sm500_device::get_opcode_param()
-{
-	// LBL and prefix opcodes are 2 bytes
-	if (m_op == 0x5e || m_op == 0x5f)
-	{
-		m_icount--;
-		m_param = m_program->read_byte(m_pc);
-		increment_pc();
-	}
-}
-
 void sm500_device::execute_one()
 {
 	switch (m_op & 0xf0)
@@ -248,3 +237,9 @@ void sm500_device::execute_one()
 
 	} // big switch
 }
+
+bool sm500_device::op_argument()
+{
+	// LBL and prefix opcodes are 2 bytes
+	return m_op == 0x5e || m_op == 0x5f;
+}
diff --git a/src/devices/cpu/sm510/sm500.h b/src/devices/cpu/sm510/sm500.h
index 6514a6e1b78..c0d097df61e 100644
--- a/src/devices/cpu/sm510/sm500.h
+++ b/src/devices/cpu/sm510/sm500.h
@@ -11,7 +11,7 @@
 
 #pragma once
 
-#include "sm510.h"
+#include "sm510base.h"
 
 
 // pinout reference
@@ -38,31 +38,6 @@ O36 48 | *                                              | 13 K2
 
          1   2   3   4   5   6   7   8   9   10  11  12
          O26 O16 R4  R3  R2  R1  GND _T  bt  al  ACL K1   note: bt = beta symbol, al = alpha symbol
-
-
-         OS2 OS3 OS4 K4  K3  K2  K1  GND al  bt  ACL _R1 _Tp NC  NC   note: on SM5L, pin 31=V1, 32=V2, 33=NC
-         45  44  43  42  41  40  39  38  37  36  35  34  33  32  31
-        ____________________________________________________________
-       |                                                            |
-OS1 46 |                                                            | 30 H1
-O41 47 |                                                            | 29 H2
-O31 48 |                                                            | 28 Vm
-O21 49 |                                                            | 27 Vdd
-O11 50 |                                                            | 26 _R2
-O42 51 |                                                            | 25 _R3
-O32 52 |                          SM5A                              | 24 _R4
-O22 53 |                          SM5L                              | 23 OSCin
-O12 54 |                                                            | 22 OSCout
-O43 55 |                                                            | 21 _T2
-O33 56 |                                                            | 20 _T1
-O23 57 |                                                            | 19 O18
-O13 58 |                                                            | 18 O28
-O44 59 |                                                            | 17 O38
-O34 60 | *                                                          | 16 O48
-       |____________________________________________________________/
-
-         1   2   3   4   5   6   7   8   9   10  11  12  13  14  15
-         O24 O14 O45 O35 O25 O15 O46 GND O36 O26 O16 O47 O37 O27 O17
 */
 
 class sm500_device : public sm510_base_device
@@ -80,7 +55,7 @@ protected:
 	virtual void device_reset() override;
 	virtual std::unique_ptr<util::disasm_interface> create_disassembler() override;
 	virtual void execute_one() override;
-	virtual void get_opcode_param() override;
+	virtual bool op_argument() override;
 	virtual void clock_melody() override;
 
 	virtual void reset_vector() override { do_branch(0, 0xf, 0); }
@@ -137,38 +112,6 @@ protected:
 };
 
 
-class sm5a_device : public sm500_device
-{
-public:
-	sm5a_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock = 32768);
-
-protected:
-	sm5a_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, u32 clock, int stack_levels, int o_pins, int prgwidth, address_map_constructor program, int datawidth, address_map_constructor data);
-
-	void program_1_8k(address_map &map);
-	void data_5x13x4(address_map &map);
-
-	virtual std::unique_ptr<util::disasm_interface> create_disassembler() override;
-	virtual void execute_one() override;
-	virtual int get_trs_field() override { return 1; }
-};
-
-class sm5l_device : public sm5a_device
-{
-public:
-	sm5l_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock = 32768);
-};
-
-class kb1013vk12_device : public sm5a_device
-{
-public:
-	kb1013vk12_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock = 32768);
-};
-
-
 DECLARE_DEVICE_TYPE(SM500, sm500_device)
-DECLARE_DEVICE_TYPE(SM5A, sm5a_device)
-DECLARE_DEVICE_TYPE(SM5L, sm5l_device)
-DECLARE_DEVICE_TYPE(KB1013VK12, kb1013vk12_device)
 
 #endif // MAME_CPU_SM510_SM500_H
diff --git a/src/devices/cpu/sm510/sm510core.cpp b/src/devices/cpu/sm510/sm510.cpp
similarity index 95%
rename from src/devices/cpu/sm510/sm510core.cpp
rename to src/devices/cpu/sm510/sm510.cpp
index b2a8c375499..35c141dcde8 100644
--- a/src/devices/cpu/sm510/sm510core.cpp
+++ b/src/devices/cpu/sm510/sm510.cpp
@@ -4,9 +4,6 @@
 
   Sharp SM510 MCU core implementation
 
-  TODO:
-  - X
-
 */
 
 #include "emu.h"
@@ -49,7 +46,6 @@ std::unique_ptr<util::disasm_interface> sm510_device::create_disassembler()
 }
 
 
-
 //-------------------------------------------------
 //  buzzer controller
 //-------------------------------------------------
@@ -80,22 +76,10 @@ void sm510_device::clock_melody()
 }
 
 
-
 //-------------------------------------------------
 //  execute
 //-------------------------------------------------
 
-void sm510_device::get_opcode_param()
-{
-	// LBL, TL, TML opcodes are 2 bytes
-	if (m_op == 0x5f || (m_op & 0xf0) == 0x70)
-	{
-		m_icount--;
-		m_param = m_program->read_byte(m_pc);
-		increment_pc();
-	}
-}
-
 void sm510_device::execute_one()
 {
 	switch (m_op & 0xf0)
@@ -174,3 +158,9 @@ void sm510_device::execute_one()
 	// BM high bit is only valid for 1 step
 	m_sbm = (m_op == 0x02);
 }
+
+bool sm510_device::op_argument()
+{
+	// LBL, TL, TML opcodes are 2 bytes
+	return m_op == 0x5f || (m_op & 0xf0) == 0x70;
+}
diff --git a/src/devices/cpu/sm510/sm510.h b/src/devices/cpu/sm510/sm510.h
index 86240d18c99..c85bd374eb4 100644
--- a/src/devices/cpu/sm510/sm510.h
+++ b/src/devices/cpu/sm510/sm510.h
@@ -11,22 +11,7 @@
 
 #pragma once
 
-// I/O ports setup
-
-// when in halt state, any K input going High can wake up the CPU,
-// driver is required to use set_input_line(SM510_INPUT_LINE_K, state)
-#define SM510_INPUT_LINE_K 0
-
-// ACL input pin
-#define SM510_INPUT_LINE_ACL INPUT_LINE_RESET
-
-enum
-{
-	SM510_PORT_SEGA = 0x00,
-	SM510_PORT_SEGB = 0x04,
-	SM510_PORT_SEGBS = 0x08,
-	SM510_PORT_SEGC = 0x0c
-};
+#include "sm510base.h"
 
 
 // pinout reference
@@ -59,232 +44,6 @@ S8 60 | *                                            | 16 b16
                            BA  OSCout Vdd
 */
 
-class sm510_base_device : public cpu_device
-{
-public:
-	// construction/destruction
-	sm510_base_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, u32 clock, int stack_levels, int prgwidth, address_map_constructor program, int datawidth, address_map_constructor data)
-		: cpu_device(mconfig, type, tag, owner, clock)
-		, m_program_config("program", ENDIANNESS_LITTLE, 8, prgwidth, 0, program)
-		, m_data_config("data", ENDIANNESS_LITTLE, 8, datawidth, 0, data)
-		, m_prgwidth(prgwidth)
-		, m_datawidth(datawidth)
-		, m_stack_levels(stack_levels)
-		, m_r_mask_option(RMASK_DIRECT)
-		, 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_segs(*this)
-		, m_melody_rom(*this, "melody")
-		, m_read_k(*this)
-		, m_read_ba(*this), m_read_b(*this)
-		, m_write_s(*this)
-		, m_write_r(*this)
-	{ }
-
-	// For SM510, SM500, SM5A, R port output is selected with a mask option,
-	// either from the divider or direct contol. Documented options are:
-	// SM510/SM5A: direct control, 2(4096Hz meant for alarm sound)
-	// SM500: 14, 11, 3 (divider f1, f4, f12)
-	void set_r_mask_option(int bit) { m_r_mask_option = bit; }
-	static constexpr int RMASK_DIRECT = -1;
-
-	// 4-bit K input port (pull-down)
-	auto read_k() { return m_read_k.bind(); }
-
-	// 1-bit BA(aka alpha) input pin (pull-up)
-	auto read_ba() { return m_read_ba.bind(); }
-
-	// 1-bit B(beta) input pin (pull-up)
-	auto read_b() { return m_read_b.bind(); }
-
-	// 8-bit S strobe output port
-	auto write_s() { return m_write_s.bind(); }
-
-	// 1/2/4-bit R (buzzer/melody) output port
-	auto write_r() { return m_write_r.bind(); }
-
-	// LCD segment outputs, SM51X: H1-4 as offset(low), a/b/c 1-16 as data d0-d15,
-	// bs output is same as above, but only up to 2 bits used.
-	// SM500/SM5A: H1/2 as a0, O group as a1-a4, O data as d0-d3
-	auto write_segs() { return m_write_segs.bind(); }
-
-protected:
-	// device-level overrides
-	virtual void device_start() override;
-	virtual void device_reset() override;
-
-	// device_execute_interface overrides
-	virtual u64 execute_clocks_to_cycles(u64 clocks) const noexcept override { return (clocks + m_clk_div - 1) / m_clk_div; } // default 2 cycles per machine cycle
-	virtual u64 execute_cycles_to_clocks(u64 cycles) const noexcept override { return (cycles * m_clk_div); } // "
-	virtual u32 execute_min_cycles() const noexcept override { return 1; }
-	virtual u32 execute_max_cycles() const noexcept override { return 2; }
-	virtual u32 execute_input_lines() const noexcept override { return 1; }
-	virtual void execute_set_input(int line, int state) override;
-	virtual void execute_run() override;
-	virtual void execute_one() { } // -> child class
-
-	// device_memory_interface overrides
-	virtual space_config_vector memory_space_config() const override;
-
-	address_space_config m_program_config;
-	address_space_config m_data_config;
-	address_space *m_program;
-	address_space *m_data;
-
-	virtual void reset_vector() { do_branch(3, 7, 0); }
-	virtual void wakeup_vector() { do_branch(1, 0, 0); } // after halt
-
-	int m_prgwidth;
-	int m_datawidth;
-	int m_prgmask;
-	int m_datamask;
-
-	u16 m_pc, m_prev_pc;
-	u16 m_op, m_prev_op;
-	u8 m_param;
-	int m_stack_levels;
-	u16 m_stack[4]; // max 4
-	int m_icount;
-
-	u8 m_acc;
-	u8 m_bl;
-	u8 m_bm;
-	bool m_sbm;
-	bool m_sbl;
-	u8 m_c;
-	bool m_skip;
-	u8 m_w;
-	u8 m_r, m_r_out;
-	int m_r_mask_option;
-	bool m_k_active;
-	bool m_halt;
-	int m_clk_div;
-
-	// lcd driver
-	optional_shared_ptr<u8> m_lcd_ram_a, m_lcd_ram_b, m_lcd_ram_c;
-	devcb_write16 m_write_segs;
-	emu_timer *m_lcd_timer;
-	u8 m_l, m_x;
-	u8 m_y;
-	u8 m_bp;
-	bool m_bc;
-
-	u16 get_lcd_row(int column, u8* ram);
-	virtual void lcd_update();
-	TIMER_CALLBACK_MEMBER(lcd_timer_cb);
-	virtual void init_lcd_driver();
-
-	// melody controller
-	optional_region_ptr<u8> m_melody_rom;
-	u8 m_melody_rd;
-	u8 m_melody_step_count;
-	u8 m_melody_duty_count;
-	u8 m_melody_duty_index;
-	u8 m_melody_address;
-
-	virtual void clock_melody() { }
-	virtual void init_melody() { }
-
-	// interrupt/divider
-	emu_timer *m_div_timer;
-	u16 m_div;
-	bool m_1s;
-
-	virtual bool wake_me_up();
-	virtual void init_divider();
-	TIMER_CALLBACK_MEMBER(div_timer_cb);
-
-	// other i/o handlers
-	devcb_read8 m_read_k;
-	devcb_read_line m_read_ba;
-	devcb_read_line m_read_b;
-	devcb_write8 m_write_s;
-	devcb_write8 m_write_r;
-
-	// misc internal helpers
-	virtual void increment_pc();
-	virtual void get_opcode_param() { }
-	virtual void update_w_latch() { }
-
-	virtual u8 ram_r();
-	virtual void ram_w(u8 data);
-	void pop_stack();
-	void push_stack();
-	virtual void do_branch(u8 pu, u8 pm, u8 pl);
-	u8 bitmask(u16 param);
-
-	// opcode handlers
-	virtual void op_lb();
-	virtual void op_lbl();
-	virtual void op_sbl();
-	virtual void op_sbm();
-	virtual void op_exbla();
-	virtual void op_incb();
-	virtual void op_decb();
-
-	virtual void op_atpl();
-	virtual void op_rtn0();
-	virtual void op_rtn1();
-	virtual void op_tl();
-	virtual void op_tml();
-	virtual void op_tm();
-	virtual void op_t();
-
-	virtual void op_exc();
-	virtual void op_bdc();
-	virtual void op_exci();
-	virtual void op_excd();
-	virtual void op_lda();
-	virtual void op_lax();
-	virtual void op_ptw();
-	virtual void op_wr();
-	virtual void op_ws();
-
-	virtual void op_kta();
-	virtual void op_atbp();
-	virtual void op_atx();
-	virtual void op_atl();
-	virtual void op_atfc();
-	virtual void op_atr();
-
-	virtual void op_add();
-	virtual void op_add11();
-	virtual void op_adx();
-	virtual void op_coma();
-	virtual void op_rot();
-	virtual void op_rc();
-	virtual void op_sc();
-
-	virtual void op_tb();
-	virtual void op_tc();
-	virtual void op_tam();
-	virtual void op_tmi();
-	virtual void op_ta0();
-	virtual void op_tabl();
-	virtual void op_tis();
-	virtual void op_tal();
-	virtual void op_tf1();
-	virtual void op_tf4();
-
-	virtual void op_rm();
-	virtual void op_sm();
-
-	virtual void op_pre();
-	virtual void op_sme();
-	virtual void op_rme();
-	virtual void op_tmel();
-
-	virtual void op_skip();
-	virtual void op_cend();
-	virtual void op_idiv();
-	virtual void op_dr();
-	virtual void op_dta();
-	virtual void op_clklo();
-	virtual void op_clkhi();
-
-	void op_illegal();
-};
-
-
 class sm510_device : public sm510_base_device
 {
 public:
@@ -296,7 +55,7 @@ protected:
 
 	virtual std::unique_ptr<util::disasm_interface> create_disassembler() override;
 	virtual void execute_one() override;
-	virtual void get_opcode_param() override;
+	virtual bool op_argument() override;
 
 	virtual void update_w_latch() override { m_write_s(m_w); } // W is connected directly to S
 
@@ -304,41 +63,6 @@ protected:
 };
 
 
-class sm511_device : public sm510_base_device
-{
-public:
-	sm511_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock = 32768);
-
-protected:
-	sm511_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, u32 clock, int stack_levels, int prgwidth, address_map_constructor program, int datawidth, address_map_constructor data);
-
-	void program_4k(address_map &map);
-	void data_96_32x4(address_map &map);
-
-	virtual void device_post_load() override { notify_clock_changed(); }
-	virtual void device_reset() override;
-
-	virtual std::unique_ptr<util::disasm_interface> create_disassembler() override;
-	virtual void execute_one() override;
-	virtual void get_opcode_param() override;
-
-	virtual void clock_melody() override;
-	virtual void init_melody() override;
-};
-
-class sm512_device : public sm511_device
-{
-public:
-	sm512_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock = 32768);
-
-protected:
-	void data_80_48x4(address_map &map);
-};
-
-
-
 DECLARE_DEVICE_TYPE(SM510, sm510_device)
-DECLARE_DEVICE_TYPE(SM511, sm511_device)
-DECLARE_DEVICE_TYPE(SM512, sm512_device)
 
 #endif // MAME_CPU_SM510_SM510_H
diff --git a/src/devices/cpu/sm510/sm510base.cpp b/src/devices/cpu/sm510/sm510base.cpp
index cca35da7730..78913087120 100644
--- a/src/devices/cpu/sm510/sm510base.cpp
+++ b/src/devices/cpu/sm510/sm510base.cpp
@@ -13,16 +13,10 @@
   Default external frequency of these is 32.768kHz, forwarding a clockrate in the
   MAME machine config is optional. Newer revisions can have an internal oscillator.
 
-  TODO:
-  - source organiziation between files is a mess
-  - wake up after CEND doesn't work right
-
-  for more, see the *core.cpp file notes
-
 */
 
 #include "emu.h"
-#include "sm510.h"
+#include "sm510base.h"
 #include "debugger.h"
 
 
@@ -38,6 +32,8 @@ enum
 
 void sm510_base_device::device_start()
 {
+	assert(SM510_INPUT_LINE_K1 == 0);
+
 	m_program = &space(AS_PROGRAM);
 	m_data = &space(AS_DATA);
 	m_prgmask = (1 << m_prgwidth) - 1;
@@ -52,7 +48,7 @@ void sm510_base_device::device_start()
 	m_write_segs.resolve_safe();
 
 	// init/zerofill
-	memset(m_stack, 0, sizeof(m_stack));
+	std::fill_n(m_stack, std::size(m_stack), 0);
 	m_pc = 0;
 	m_prev_pc = 0;
 	m_op = 0;
@@ -70,7 +66,9 @@ void sm510_base_device::device_start()
 	m_r_out = 0;
 	m_div = 0;
 	m_1s = false;
-	m_k_active = false;
+	m_1s_rise = false;
+	m_k_rise = false;
+	std::fill_n(m_k_input, std::size(m_k_input), 0);
 	m_l = 0;
 	m_x = 0;
 	m_y = 0;
@@ -103,7 +101,9 @@ void sm510_base_device::device_start()
 	save_item(NAME(m_r_out));
 	save_item(NAME(m_div));
 	save_item(NAME(m_1s));
-	save_item(NAME(m_k_active));
+	save_item(NAME(m_1s_rise));
+	save_item(NAME(m_k_rise));
+	save_item(NAME(m_k_input));
 	save_item(NAME(m_l));
 	save_item(NAME(m_x));
 	save_item(NAME(m_y));
@@ -138,6 +138,13 @@ void sm510_base_device::device_start()
 	init_melody();
 }
 
+device_memory_interface::space_config_vector sm510_base_device::memory_space_config() const
+{
+	return space_config_vector {
+		std::make_pair(AS_PROGRAM, &m_program_config),
+		std::make_pair(AS_DATA,    &m_data_config)
+	};
+}
 
 
 //-------------------------------------------------
@@ -165,7 +172,6 @@ void sm510_base_device::device_reset()
 }
 
 
-
 //-------------------------------------------------
 //  lcd driver
 //-------------------------------------------------
@@ -183,14 +189,6 @@ inline u16 sm510_base_device::get_lcd_row(int column, u8* ram)
 	return rowdata;
 }
 
-device_memory_interface::space_config_vector sm510_base_device::memory_space_config() const
-{
-	return space_config_vector {
-		std::make_pair(AS_PROGRAM, &m_program_config),
-		std::make_pair(AS_DATA,    &m_data_config)
-	};
-}
-
 void sm510_base_device::lcd_update()
 {
 	// 4 columns
@@ -222,44 +220,20 @@ void sm510_base_device::init_lcd_driver()
 }
 
 
-
 //-------------------------------------------------
-//  interrupt/divider
+//  divider
 //-------------------------------------------------
 
-bool sm510_base_device::wake_me_up()
-{
-	// in halt mode, wake up after 1S signal or K input
-	if (m_k_active || m_1s)
-	{
-		// note: official doc warns that Bl/Bm and the stack are undefined
-		// after waking up, but we leave it unchanged
-		m_halt = false;
-		wakeup_vector();
-
-		standard_irq_callback(0);
-		return true;
-	}
-	else
-		return false;
-}
-
-void sm510_base_device::execute_set_input(int line, int state)
-{
-	if (line != SM510_INPUT_LINE_K)
-		return;
-
-	// set K input lines active state
-	m_k_active = (state != 0);
-}
-
 TIMER_CALLBACK_MEMBER(sm510_base_device::div_timer_cb)
 {
 	m_div = (m_div + 1) & 0x7fff;
 
 	// 1S signal on overflow(falling edge of F1)
 	if (m_div == 0)
+	{
+		m_1s_rise = !m_1s;
 		m_1s = true;
+	}
 
 	clock_melody();
 }
@@ -271,6 +245,33 @@ void sm510_base_device::init_divider()
 }
 
 
+//-------------------------------------------------
+//  interrupt
+//-------------------------------------------------
+
+void sm510_base_device::execute_set_input(int line, int state)
+{
+	if (!valid_wakeup_line(line))
+		return;
+
+	// rising edge of any K input
+	if (state && !m_k_input[line])
+		m_k_rise = true;
+
+	m_k_input[line] = state;
+}
+
+void sm510_base_device::do_interrupt()
+{
+	// note: official doc warns that Bl/Bm and the stack are undefined
+	// after waking up, but we leave it unchanged
+	m_icount--;
+	m_halt = false;
+	wakeup_vector();
+
+	standard_irq_callback(0);
+}
+
 
 //-------------------------------------------------
 //  execute
@@ -286,17 +287,29 @@ void sm510_base_device::increment_pc()
 
 void sm510_base_device::execute_run()
 {
+	bool _1s_prev = m_1s_rise;
+
 	while (m_icount > 0)
 	{
-		m_icount--;
+		// in halt mode, wake up after 1S signal or K input
+		bool wakeup = m_k_rise || m_1s_rise;
+		m_k_rise = false;
+		m_1s_rise = false;
 
-		if (m_halt && !wake_me_up())
+		if (m_halt)
 		{
-			// got nothing to do
-			m_icount = 0;
-			return;
+			if (!wakeup)
+			{
+				// got nothing to do
+				m_icount = 0;
+				return;
+			}
+			else
+				do_interrupt();
 		}
 
+		m_icount--;
+
 		// remember previous state
 		m_prev_op = m_op;
 		m_prev_pc = m_pc;
@@ -306,7 +319,14 @@ void sm510_base_device::execute_run()
 			debugger_instruction_hook(m_pc);
 		m_op = m_program->read_byte(m_pc);
 		increment_pc();
-		get_opcode_param();
+
+		// 2-byte opcodes
+		if (op_argument())
+		{
+			m_icount--;
+			m_param = m_program->read_byte(m_pc);
+			increment_pc();
+		}
 
 		// handle opcode if it's not skipped
 		if (m_skip)
@@ -316,5 +336,10 @@ void sm510_base_device::execute_run()
 		}
 		else
 			execute_one();
+
+		// if CEND triggered at the same time as 1S signal, make sure it still wakes up
+		if (m_halt)
+			m_1s_rise = _1s_prev;
+		_1s_prev = false;
 	}
 }
diff --git a/src/devices/cpu/sm510/sm510base.h b/src/devices/cpu/sm510/sm510base.h
new file mode 100644
index 00000000000..3850089dc28
--- /dev/null
+++ b/src/devices/cpu/sm510/sm510base.h
@@ -0,0 +1,274 @@
+// license:BSD-3-Clause
+// copyright-holders:hap
+/*
+
+  Sharp SM510 MCU family - base/shared
+
+  Don't include this file, include the specific device header instead,
+  for example sm510.h
+
+*/
+
+#ifndef MAME_CPU_SM510_SM510BASE_H
+#define MAME_CPU_SM510_SM510BASE_H
+
+#pragma once
+
+// I/O ports setup
+
+// when in halt state, any K input going high can wake up the CPU,
+// driver is required to use set_input_line(SM510_INPUT_LINE_K1/K2/K3/K4, state)
+enum
+{
+	SM510_INPUT_LINE_K1 = 0,
+	SM510_INPUT_LINE_K2,
+	SM510_INPUT_LINE_K3,
+	SM510_INPUT_LINE_K4
+};
+
+// ACL input pin
+#define SM510_INPUT_LINE_ACL INPUT_LINE_RESET
+
+// LCD commons
+enum
+{
+	SM510_PORT_SEGA = 0x00,
+	SM510_PORT_SEGB = 0x04,
+	SM510_PORT_SEGBS = 0x08,
+	SM510_PORT_SEGC = 0x0c
+};
+
+
+class sm510_base_device : public cpu_device
+{
+public:
+	// construction/destruction
+	sm510_base_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, u32 clock, int stack_levels, int prgwidth, address_map_constructor program, int datawidth, address_map_constructor data)
+		: cpu_device(mconfig, type, tag, owner, clock)
+		, m_program_config("program", ENDIANNESS_LITTLE, 8, prgwidth, 0, program)
+		, m_data_config("data", ENDIANNESS_LITTLE, 8, datawidth, 0, data)
+		, m_prgwidth(prgwidth)
+		, m_datawidth(datawidth)
+		, m_stack_levels(stack_levels)
+		, m_r_mask_option(RMASK_DIRECT)
+		, 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_segs(*this)
+		, m_melody_rom(*this, "melody")
+		, m_read_k(*this)
+		, m_read_ba(*this), m_read_b(*this)
+		, m_write_s(*this)
+		, m_write_r(*this)
+	{ }
+
+	// For SM510, SM500, SM5A, R port output is selected with a mask option,
+	// either from the divider or direct contol. Documented options are:
+	// SM510/SM5A: direct control, 2(4096Hz meant for alarm sound)
+	// SM500: 14, 11, 3 (divider f1, f4, f12)
+	void set_r_mask_option(int bit) { m_r_mask_option = bit; }
+	static constexpr int RMASK_DIRECT = -1;
+
+	// 4-bit K input port (pull-down)
+	auto read_k() { return m_read_k.bind(); }
+
+	// 1-bit BA(aka alpha) input pin (pull-up)
+	auto read_ba() { return m_read_ba.bind(); }
+
+	// 1-bit B(beta) input pin (pull-up)
+	auto read_b() { return m_read_b.bind(); }
+
+	// 8-bit S strobe output port
+	auto write_s() { return m_write_s.bind(); }
+
+	// 1/2/4-bit R (buzzer/melody) output port
+	auto write_r() { return m_write_r.bind(); }
+
+	// LCD segment outputs, SM51X: H1-4 as offset(low), a/b/c 1-16 as data d0-d15,
+	// bs output is same as above, but only up to 2 bits used.
+	// SM500/SM5A: H1/2 as a0, O group as a1-a4, O data as d0-d3
+	auto write_segs() { return m_write_segs.bind(); }
+
+protected:
+	// device-level overrides
+	virtual void device_start() override;
+	virtual void device_reset() override;
+
+	// device_execute_interface overrides
+	virtual u64 execute_clocks_to_cycles(u64 clocks) const noexcept override { return (clocks + m_clk_div - 1) / m_clk_div; } // default 2 cycles per machine cycle
+	virtual u64 execute_cycles_to_clocks(u64 cycles) const noexcept override { return (cycles * m_clk_div); } // "
+	virtual u32 execute_min_cycles() const noexcept override { return 1; }
+	virtual u32 execute_max_cycles() const noexcept override { return 3+1; }
+	virtual u32 execute_input_lines() const noexcept override { return 4; }
+	virtual bool execute_input_edge_triggered(int inputnum) const noexcept override { return valid_wakeup_line(inputnum); }
+	virtual void execute_set_input(int line, int state) override;
+	virtual void execute_run() override;
+
+	virtual void execute_one() { } // -> child class
+	virtual bool op_argument() { return false; }
+
+	// device_memory_interface overrides
+	virtual space_config_vector memory_space_config() const override;
+
+	address_space_config m_program_config;
+	address_space_config m_data_config;
+	address_space *m_program;
+	address_space *m_data;
+
+	virtual void reset_vector() { do_branch(3, 7, 0); }
+	virtual void wakeup_vector() { do_branch(1, 0, 0); } // after halt
+	virtual bool valid_wakeup_line(int line) const { return (line >= 0 && line < 4); }
+
+	int m_prgwidth;
+	int m_datawidth;
+	int m_prgmask;
+	int m_datamask;
+
+	u16 m_pc, m_prev_pc;
+	u16 m_op, m_prev_op;
+	u8 m_param;
+	int m_stack_levels;
+	u16 m_stack[4]; // max 4
+	int m_icount;
+
+	u8 m_acc;
+	u8 m_bl;
+	u8 m_bm;
+	bool m_sbm;
+	bool m_sbl;
+	u8 m_c;
+	bool m_skip;
+	u8 m_w;
+	u8 m_r;
+	u8 m_r_out;
+	int m_r_mask_option;
+	int m_k_input[4];
+	bool m_k_rise;
+	bool m_halt;
+	int m_clk_div;
+
+	// lcd driver
+	optional_shared_ptr<u8> m_lcd_ram_a, m_lcd_ram_b, m_lcd_ram_c;
+	devcb_write16 m_write_segs;
+	emu_timer *m_lcd_timer;
+	u8 m_l;
+	u8 m_x;
+	u8 m_y;
+	u8 m_bp;
+	bool m_bc;
+
+	u16 get_lcd_row(int column, u8* ram);
+	virtual void lcd_update();
+	TIMER_CALLBACK_MEMBER(lcd_timer_cb);
+	virtual void init_lcd_driver();
+
+	// melody controller
+	optional_region_ptr<u8> m_melody_rom;
+	u8 m_melody_rd;
+	u8 m_melody_step_count;
+	u8 m_melody_duty_count;
+	u8 m_melody_duty_index;
+	u8 m_melody_address;
+
+	virtual void clock_melody() { }
+	virtual void init_melody() { }
+
+	// divider
+	emu_timer *m_div_timer;
+	u16 m_div;
+	bool m_1s;
+	bool m_1s_rise;
+
+	virtual void init_divider();
+	TIMER_CALLBACK_MEMBER(div_timer_cb);
+
+	// other i/o handlers
+	devcb_read8 m_read_k;
+	devcb_read_line m_read_ba;
+	devcb_read_line m_read_b;
+	devcb_write8 m_write_s;
+	devcb_write8 m_write_r;
+
+	// misc internal helpers
+	virtual void increment_pc();
+	virtual void update_w_latch() { }
+	void do_interrupt();
+
+	virtual u8 ram_r();
+	virtual void ram_w(u8 data);
+	void pop_stack();
+	void push_stack();
+	virtual void do_branch(u8 pu, u8 pm, u8 pl);
+	u8 bitmask(u16 param);
+
+	// opcode handlers
+	virtual void op_lb();
+	virtual void op_lbl();
+	virtual void op_sbl();
+	virtual void op_sbm();
+	virtual void op_exbla();
+	virtual void op_incb();
+	virtual void op_decb();
+
+	virtual void op_atpl();
+	virtual void op_rtn0();
+	virtual void op_rtn1();
+	virtual void op_tl();
+	virtual void op_tml();
+	virtual void op_tm();
+	virtual void op_t();
+
+	virtual void op_exc();
+	virtual void op_bdc();
+	virtual void op_exci();
+	virtual void op_excd();
+	virtual void op_lda();
+	virtual void op_lax();
+	virtual void op_ptw();
+	virtual void op_wr();
+	virtual void op_ws();
+
+	virtual void op_kta();
+	virtual void op_atbp();
+	virtual void op_atx();
+	virtual void op_atl();
+	virtual void op_atfc();
+	virtual void op_atr();
+
+	virtual void op_add();
+	virtual void op_add11();
+	virtual void op_adx();
+	virtual void op_coma();
+	virtual void op_rot();
+	virtual void op_rc();
+	virtual void op_sc();
+
+	virtual void op_tb();
+	virtual void op_tc();
+	virtual void op_tam();
+	virtual void op_tmi();
+	virtual void op_ta0();
+	virtual void op_tabl();
+	virtual void op_tis();
+	virtual void op_tal();
+	virtual void op_tf1();
+	virtual void op_tf4();
+
+	virtual void op_rm();
+	virtual void op_sm();
+
+	virtual void op_pre();
+	virtual void op_sme();
+	virtual void op_rme();
+	virtual void op_tmel();
+
+	virtual void op_skip();
+	virtual void op_cend();
+	virtual void op_idiv();
+	virtual void op_dr();
+	virtual void op_dta();
+	virtual void op_clklo();
+	virtual void op_clkhi();
+
+	void op_illegal();
+};
+
+#endif // MAME_CPU_SM510_SM510BASE_H
diff --git a/src/devices/cpu/sm510/sm510d.h b/src/devices/cpu/sm510/sm510d.h
index 2d49cbb5059..b7d51786d4b 100644
--- a/src/devices/cpu/sm510/sm510d.h
+++ b/src/devices/cpu/sm510/sm510d.h
@@ -154,4 +154,4 @@ private:
 	static const u8 sm590_mnemonic[0x100];
 };
 
-#endif
+#endif // MAME_CPU_SM510_SM510D_H
diff --git a/src/devices/cpu/sm510/sm510op.cpp b/src/devices/cpu/sm510/sm510op.cpp
index 8570f6139b5..8f09d5f3dab 100644
--- a/src/devices/cpu/sm510/sm510op.cpp
+++ b/src/devices/cpu/sm510/sm510op.cpp
@@ -4,7 +4,7 @@
 // SM510 shared opcode handlers
 
 #include "emu.h"
-#include "sm510.h"
+#include "sm510base.h"
 
 
 // internal helpers
@@ -52,7 +52,6 @@ u8 sm510_base_device::bitmask(u16 param)
 }
 
 
-
 // instruction set
 
 // RAM address instructions
@@ -154,7 +153,6 @@ void sm510_base_device::op_tm()
 }
 
 
-
 // Data transfer instructions
 
 void sm510_base_device::op_exc()
diff --git a/src/devices/cpu/sm510/sm511core.cpp b/src/devices/cpu/sm510/sm511.cpp
similarity index 96%
rename from src/devices/cpu/sm510/sm511core.cpp
rename to src/devices/cpu/sm510/sm511.cpp
index 90de18142f7..c678ba975b7 100644
--- a/src/devices/cpu/sm510/sm511core.cpp
+++ b/src/devices/cpu/sm510/sm511.cpp
@@ -14,7 +14,7 @@
 */
 
 #include "emu.h"
-#include "sm510.h"
+#include "sm511.h"
 #include "sm510d.h"
 #include "debugger.h"
 
@@ -67,7 +67,6 @@ sm512_device::sm512_device(const machine_config &mconfig, const char *tag, devic
 { }
 
 
-
 //-------------------------------------------------
 //  device_reset - device-specific reset
 //-------------------------------------------------
@@ -82,7 +81,6 @@ void sm511_device::device_reset()
 }
 
 
-
 //-------------------------------------------------
 //  melody controller
 //-------------------------------------------------
@@ -158,22 +156,10 @@ void sm511_device::init_melody()
 }
 
 
-
 //-------------------------------------------------
 //  execute
 //-------------------------------------------------
 
-void sm511_device::get_opcode_param()
-{
-	// LBL, PRE, TL, TML and prefix opcodes are 2 bytes
-	if ((m_op >= 0x5f && m_op <= 0x61) || (m_op & 0xf0) == 0x70 || (m_op & 0xfc) == 0x68)
-	{
-		m_icount--;
-		m_param = m_program->read_byte(m_pc);
-		increment_pc();
-	}
-}
-
 void sm511_device::execute_one()
 {
 	switch (m_op & 0xf0)
@@ -267,3 +253,9 @@ void sm511_device::execute_one()
 	// BM high bit is only valid for 1 step
 	m_sbm = (m_op == 0x02);
 }
+
+bool sm511_device::op_argument()
+{
+	// LBL, PRE, TL, TML and prefix opcodes are 2 bytes
+	return (m_op >= 0x5f && m_op <= 0x61) || (m_op & 0xf0) == 0x70 || (m_op & 0xfc) == 0x68;
+}
diff --git a/src/devices/cpu/sm510/sm511.h b/src/devices/cpu/sm510/sm511.h
new file mode 100644
index 00000000000..54066d1d405
--- /dev/null
+++ b/src/devices/cpu/sm510/sm511.h
@@ -0,0 +1,62 @@
+// license:BSD-3-Clause
+// copyright-holders:hap
+/*
+
+  Sharp SM511 MCU family cores
+
+*/
+
+#ifndef MAME_CPU_SM510_SM511_H
+#define MAME_CPU_SM510_SM511_H
+
+#pragma once
+
+#include "sm510base.h"
+
+
+// pinout reference
+
+/*
+
+SM511: identical to SM510 (see sm510.h)
+
+SM512: can't be bothered to draw one here, it's 80 pins QFP, a lot of LCD segment pins
+
+*/
+
+class sm511_device : public sm510_base_device
+{
+public:
+	sm511_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock = 32768);
+
+protected:
+	sm511_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, u32 clock, int stack_levels, int prgwidth, address_map_constructor program, int datawidth, address_map_constructor data);
+
+	void program_4k(address_map &map);
+	void data_96_32x4(address_map &map);
+
+	virtual void device_post_load() override { notify_clock_changed(); }
+	virtual void device_reset() override;
+
+	virtual std::unique_ptr<util::disasm_interface> create_disassembler() override;
+	virtual void execute_one() override;
+	virtual bool op_argument() override;
+
+	virtual void clock_melody() override;
+	virtual void init_melody() override;
+};
+
+class sm512_device : public sm511_device
+{
+public:
+	sm512_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock = 32768);
+
+protected:
+	void data_80_48x4(address_map &map);
+};
+
+
+DECLARE_DEVICE_TYPE(SM511, sm511_device)
+DECLARE_DEVICE_TYPE(SM512, sm512_device)
+
+#endif // MAME_CPU_SM510_SM511_H
diff --git a/src/devices/cpu/sm510/sm530core.cpp b/src/devices/cpu/sm510/sm530.cpp
similarity index 96%
rename from src/devices/cpu/sm510/sm530core.cpp
rename to src/devices/cpu/sm510/sm530.cpp
index 3d3a424ad90..3b73ee036f2 100644
--- a/src/devices/cpu/sm510/sm530core.cpp
+++ b/src/devices/cpu/sm510/sm530.cpp
@@ -55,7 +55,6 @@ sm531_device::sm531_device(const machine_config &mconfig, const char *tag, devic
 { }
 
 
-
 //-------------------------------------------------
 //  device_start - device-specific startup
 //-------------------------------------------------
@@ -67,7 +66,6 @@ void sm530_device::device_start()
 }
 
 
-
 //-------------------------------------------------
 //  device_reset - device-specific reset
 //-------------------------------------------------
@@ -79,22 +77,10 @@ void sm530_device::device_reset()
 }
 
 
-
 //-------------------------------------------------
 //  execute
 //-------------------------------------------------
 
-void sm530_device::get_opcode_param()
-{
-	// LBL, PRE, TL opcodes are 2 bytes
-	if (m_op == 0x6b || m_op == 0x78 || ((m_op & 0xf8) == 0x60))
-	{
-		m_icount--;
-		m_param = m_program->read_byte(m_pc);
-		increment_pc();
-	}
-}
-
 void sm530_device::execute_one()
 {
 	switch (m_op & 0xf0)
@@ -174,3 +160,9 @@ void sm530_device::execute_one()
 	m_sbl = (m_op == 0x73);
 	m_sbm = (m_op == 0x72);
 }
+
+bool sm530_device::op_argument()
+{
+	// LBL, PRE, TL opcodes are 2 bytes
+	return m_op == 0x6b || m_op == 0x78 || ((m_op & 0xf8) == 0x60);
+}
diff --git a/src/devices/cpu/sm510/sm530.h b/src/devices/cpu/sm510/sm530.h
index e0c3b4dd769..66136b89904 100644
--- a/src/devices/cpu/sm510/sm530.h
+++ b/src/devices/cpu/sm510/sm530.h
@@ -11,7 +11,7 @@
 
 #pragma once
 
-#include "sm510.h"
+#include "sm511.h"
 
 
 class sm530_device : public sm511_device
@@ -32,7 +32,7 @@ protected:
 	virtual u64 execute_clocks_to_cycles(u64 clocks) const noexcept override { return (clocks + 3 - 1) / 3; } // 3 cycles per machine cycle
 	virtual u64 execute_cycles_to_clocks(u64 cycles) const noexcept override { return (cycles * 3); } // "
 	virtual void execute_one() override;
-	virtual void get_opcode_param() override;
+	virtual bool op_argument() override;
 
 	using sm510_base_device::do_branch;
 	virtual void do_branch(u8 pu, u8 pl); // does not have Pm
@@ -58,7 +58,6 @@ public:
 };
 
 
-
 DECLARE_DEVICE_TYPE(SM530, sm530_device)
 DECLARE_DEVICE_TYPE(SM531, sm531_device)
 
diff --git a/src/devices/cpu/sm510/sm530op.cpp b/src/devices/cpu/sm510/sm530op.cpp
index 3aec192b0a0..6beaa8905f4 100644
--- a/src/devices/cpu/sm510/sm530op.cpp
+++ b/src/devices/cpu/sm510/sm530op.cpp
@@ -16,7 +16,6 @@ void sm530_device::do_branch(u8 pu, u8 pl)
 }
 
 
-
 // instruction set
 
 // RAM address instructions
diff --git a/src/devices/cpu/sm510/sm590core.cpp b/src/devices/cpu/sm510/sm590.cpp
similarity index 91%
rename from src/devices/cpu/sm510/sm590core.cpp
rename to src/devices/cpu/sm510/sm590.cpp
index fd1bca5fc9d..d45fbbe7a82 100644
--- a/src/devices/cpu/sm510/sm590core.cpp
+++ b/src/devices/cpu/sm510/sm590.cpp
@@ -61,6 +61,7 @@ std::unique_ptr<util::disasm_interface> sm590_device::create_disassembler()
 //-------------------------------------------------
 //  device_reset - device-specific reset
 //-------------------------------------------------
+
 void sm590_device::device_reset()
 {
 	// ACL
@@ -76,27 +77,11 @@ void sm590_device::device_reset()
 	//m_write_r(0); // TODO: are the four ports zeroed on reset?
 }
 
-//-------------------------------------------------
-//  wake from suspend mode
-//-------------------------------------------------
-bool sm590_device::wake_me_up()
-{
-	// in halt mode, wake up after R2.2 goes high
-	if (m_rports[2]&0x4)
-	{
-		m_halt = false;
-		do_branch(0, 1, 0); // field 0, page 1, step 0
-
-		standard_irq_callback(0);
-		return true;
-	}
-	else
-		return false;
-}
 
 //-------------------------------------------------
 //  execute
 //-------------------------------------------------
+
 void sm590_device::increment_pc()
 {
 	// PL(program counter low 7 bits) is a simple LFSR: newbit = (bit0==bit1)
@@ -105,17 +90,6 @@ void sm590_device::increment_pc()
 	m_pc = feed | (m_pc >> 1 & 0x3f) | (m_pc & ~0x7f);
 }
 
-void sm590_device::get_opcode_param()
-{
-	// TL, TLS(TML) opcodes are 2 bytes
-	if ((m_op & 0xf8) == 0x78)
-	{
-		m_icount--;
-		m_param = m_program->read_byte(m_pc);
-		increment_pc();
-	}
-}
-
 void sm590_device::execute_one()
 {
 	switch (m_op & 0xf0) // opcodes with 4 bit params
@@ -184,3 +158,9 @@ void sm590_device::execute_one()
 
 	} // big switch
 }
+
+bool sm590_device::op_argument()
+{
+	// TL, TLS(TML) opcodes are 2 bytes
+	return (m_op & 0xf8) == 0x78;
+}
diff --git a/src/devices/cpu/sm510/sm590.h b/src/devices/cpu/sm510/sm590.h
index 5a3bd33ad37..f6b7416d044 100644
--- a/src/devices/cpu/sm510/sm590.h
+++ b/src/devices/cpu/sm510/sm590.h
@@ -9,12 +9,13 @@
 #ifndef MAME_CPU_SM510_SM590_H
 #define MAME_CPU_SM510_SM590_H
 
-#include "sm510.h"
+#include "sm510base.h"
 
 
 // I/O ports setup
 
-// ..
+// It does not have K pins, but can wake up after halt on R2.2
+#define SM590_INPUT_LINE_R22 SM510_INPUT_LINE_K3
 
 
 // pinout reference
@@ -89,7 +90,6 @@ R3.3/CL2 =>  |_|6         15|_|  <> R1.3
      GND --  |_|10        11|_|  <> R1.0
                |____________|
 
-
 */
 
 class sm590_device : public sm510_base_device
@@ -105,17 +105,17 @@ protected:
 
 	virtual void device_reset() override;
 	virtual std::unique_ptr<util::disasm_interface> create_disassembler() override;
-	virtual bool wake_me_up() override;
 	virtual void init_divider() override { }
 	virtual void init_lcd_driver() override { }
 	virtual void init_melody() override { }
 	virtual void increment_pc() override;
 	virtual void execute_one() override;
-	virtual void get_opcode_param() override;
+	virtual bool op_argument() override;
 	virtual void do_branch(u8 pu, u8 pm, u8 pl) override;
 
 	virtual void reset_vector() override { do_branch(0, 0, 0); }
 	virtual void wakeup_vector() override { do_branch(0, 1, 0); }
+	virtual bool valid_wakeup_line(int line) const override { return (line == SM590_INPUT_LINE_R22); }
 
 	// opcode handlers
 	// 00-3f
diff --git a/src/devices/cpu/sm510/sm590op.cpp b/src/devices/cpu/sm510/sm590op.cpp
index c9ead123360..ff0b902c697 100644
--- a/src/devices/cpu/sm510/sm590op.cpp
+++ b/src/devices/cpu/sm510/sm590op.cpp
@@ -15,6 +15,7 @@ void sm590_device::do_branch(u8 pu, u8 pm, u8 pl)
 	m_pc = (((u16)pu << 9 & 0x200) | ((u16)pm << 7 & 0x180) | (pl & 0x07f)) & m_prgmask;
 }
 
+
 // instruction set
 
 void sm590_device::op_adx()
diff --git a/src/devices/cpu/sm510/sm5acore.cpp b/src/devices/cpu/sm510/sm5a.cpp
similarity index 99%
rename from src/devices/cpu/sm510/sm5acore.cpp
rename to src/devices/cpu/sm510/sm5a.cpp
index a48ffb8110d..a6dbf24edab 100644
--- a/src/devices/cpu/sm510/sm5acore.cpp
+++ b/src/devices/cpu/sm510/sm5a.cpp
@@ -10,7 +10,7 @@
 */
 
 #include "emu.h"
-#include "sm500.h"
+#include "sm5a.h"
 #include "sm510d.h"
 #include "debugger.h"
 
diff --git a/src/devices/cpu/sm510/sm5a.h b/src/devices/cpu/sm510/sm5a.h
new file mode 100644
index 00000000000..de7128078d6
--- /dev/null
+++ b/src/devices/cpu/sm510/sm5a.h
@@ -0,0 +1,79 @@
+// license:BSD-3-Clause
+// copyright-holders:hap
+/*
+
+  Sharp SM5A MCU family cores
+
+*/
+
+#ifndef MAME_CPU_SM510_SM5A_H
+#define MAME_CPU_SM510_SM5A_H
+
+#pragma once
+
+#include "sm500.h"
+
+
+// pinout reference
+
+/*
+
+         OS2 OS3 OS4 K4  K3  K2  K1  GND al  bt  ACL _R1 _Tp NC  NC   note: on SM5L, pin 31=V1, 32=V2, 33=NC
+         45  44  43  42  41  40  39  38  37  36  35  34  33  32  31
+        ____________________________________________________________
+       |                                                            |
+OS1 46 |                                                            | 30 H1
+O41 47 |                                                            | 29 H2
+O31 48 |                                                            | 28 Vm
+O21 49 |                                                            | 27 Vdd
+O11 50 |                                                            | 26 _R2
+O42 51 |                                                            | 25 _R3
+O32 52 |                          SM5A                              | 24 _R4
+O22 53 |                          SM5L                              | 23 OSCin
+O12 54 |                                                            | 22 OSCout
+O43 55 |                                                            | 21 _T2
+O33 56 |                                                            | 20 _T1
+O23 57 |                                                            | 19 O18
+O13 58 |                                                            | 18 O28
+O44 59 |                                                            | 17 O38
+O34 60 | *                                                          | 16 O48
+       |____________________________________________________________/
+
+         1   2   3   4   5   6   7   8   9   10  11  12  13  14  15
+         O24 O14 O45 O35 O25 O15 O46 GND O36 O26 O16 O47 O37 O27 O17
+*/
+
+class sm5a_device : public sm500_device
+{
+public:
+	sm5a_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock = 32768);
+
+protected:
+	sm5a_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, u32 clock, int stack_levels, int o_pins, int prgwidth, address_map_constructor program, int datawidth, address_map_constructor data);
+
+	void program_1_8k(address_map &map);
+	void data_5x13x4(address_map &map);
+
+	virtual std::unique_ptr<util::disasm_interface> create_disassembler() override;
+	virtual void execute_one() override;
+	virtual int get_trs_field() override { return 1; }
+};
+
+class sm5l_device : public sm5a_device
+{
+public:
+	sm5l_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock = 32768);
+};
+
+class kb1013vk12_device : public sm5a_device
+{
+public:
+	kb1013vk12_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock = 32768);
+};
+
+
+DECLARE_DEVICE_TYPE(SM5A, sm5a_device)
+DECLARE_DEVICE_TYPE(SM5L, sm5l_device)
+DECLARE_DEVICE_TYPE(KB1013VK12, kb1013vk12_device)
+
+#endif // MAME_CPU_SM510_SM5A_H
diff --git a/src/mame/drivers/hh_sm510.cpp b/src/mame/drivers/hh_sm510.cpp
index a38baa95b92..1017968ab56 100644
--- a/src/mame/drivers/hh_sm510.cpp
+++ b/src/mame/drivers/hh_sm510.cpp
@@ -277,9 +277,6 @@ void hh_sm510_state::sm500_lcd_segment_w(offs_t offset, u16 data)
 
 // generic input handlers - usually S output is input mux, and K input for buttons
 
-#define PORT_CHANGED_CB(x) \
-	PORT_CHANGED_MEMBER(DEVICE_SELF, hh_sm510_state, x, 0)
-
 u8 hh_sm510_state::read_inputs(int columns, int fixed)
 {
 	u8 ret = 0;
@@ -298,7 +295,9 @@ u8 hh_sm510_state::read_inputs(int columns, int fixed)
 void hh_sm510_state::update_k_line()
 {
 	// this is necessary because the MCU can wake up on K input activity
-	m_maincpu->set_input_line(SM510_INPUT_LINE_K, input_r() ? ASSERT_LINE : CLEAR_LINE);
+	u8 input = input_r();
+	for (int i = 0; i < 4; i++)
+		m_maincpu->set_input_line(i, BIT(input, i) ? ASSERT_LINE : CLEAR_LINE);
 }
 
 INPUT_CHANGED_MEMBER(hh_sm510_state::input_changed)
diff --git a/src/mame/drivers/rzone.cpp b/src/mame/drivers/rzone.cpp
index 4631779e9ec..9a24b067a3b 100644
--- a/src/mame/drivers/rzone.cpp
+++ b/src/mame/drivers/rzone.cpp
@@ -40,6 +40,9 @@
 // internal artwork
 #include "rzone.lh"
 
+
+namespace {
+
 class rzone_state : public hh_sm510_state
 {
 public:
@@ -53,6 +56,9 @@ public:
 	void rztoshden(machine_config &config);
 	void rzindy500(machine_config &config);
 
+protected:
+	virtual void machine_start() override;
+
 private:
 	output_finder<> m_led_out;
 	required_device<timer_device> m_led_off;
@@ -75,8 +81,6 @@ private:
 	void t2_update_audio();
 	void t2_write_r(u8 data);
 	void t2_write_s(u8 data);
-
-	virtual void machine_start() override;
 };
 
 
@@ -102,9 +106,7 @@ void rzone_state::machine_start()
 
 
 /***************************************************************************
-
-  I/O
-
+    I/O
 ***************************************************************************/
 
 // console
@@ -214,47 +216,43 @@ void rzone_state::t2_write_s(u8 data)
 
 
 /***************************************************************************
-
-  Inputs
-
+    Inputs
 ***************************************************************************/
 
 static INPUT_PORTS_START( rzone )
 	PORT_START("IN.0")
-	PORT_BIT( 0x0001, IP_ACTIVE_HIGH, IPT_POWER_ON ) PORT_CHANGED_MEMBER(DEVICE_SELF, hh_sm510_state, input_changed, 0)
-	PORT_BIT( 0x0002, IP_ACTIVE_HIGH, IPT_JOYSTICK_UP )
-	PORT_BIT( 0x0004, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT )
-	PORT_BIT( 0x0008, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT )
-	PORT_BIT( 0x0010, IP_ACTIVE_HIGH, IPT_JOYSTICK_DOWN )
-	PORT_BIT( 0x0020, IP_ACTIVE_HIGH, IPT_BUTTON1 ) // A
-	PORT_BIT( 0x0040, IP_ACTIVE_HIGH, IPT_BUTTON2 ) // B
-	PORT_BIT( 0x0080, IP_ACTIVE_HIGH, IPT_BUTTON3 ) // C
-	PORT_BIT( 0x0100, IP_ACTIVE_HIGH, IPT_BUTTON4 ) // D
-	PORT_BIT( 0x0200, IP_ACTIVE_HIGH, IPT_VOLUME_DOWN ) PORT_NAME("Sound")
-	PORT_BIT( 0x0400, IP_ACTIVE_HIGH, IPT_SELECT )
-	PORT_BIT( 0x0800, IP_ACTIVE_HIGH, IPT_POWER_OFF )
-	PORT_BIT( 0x1000, IP_ACTIVE_HIGH, IPT_BUTTON5 ) PORT_NAME("Pause")
-	PORT_BIT( 0x2000, IP_ACTIVE_HIGH, IPT_START )
+	PORT_BIT( 0x0001, IP_ACTIVE_HIGH, IPT_POWER_ON ) PORT_CHANGED_CB(input_changed)
+	PORT_BIT( 0x0002, IP_ACTIVE_HIGH, IPT_JOYSTICK_UP ) PORT_CHANGED_CB(input_changed)
+	PORT_BIT( 0x0004, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT ) PORT_CHANGED_CB(input_changed)
+	PORT_BIT( 0x0008, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT ) PORT_CHANGED_CB(input_changed)
+	PORT_BIT( 0x0010, IP_ACTIVE_HIGH, IPT_JOYSTICK_DOWN ) PORT_CHANGED_CB(input_changed)
+	PORT_BIT( 0x0020, IP_ACTIVE_HIGH, IPT_BUTTON1 ) PORT_CHANGED_CB(input_changed) // A
+	PORT_BIT( 0x0040, IP_ACTIVE_HIGH, IPT_BUTTON2 ) PORT_CHANGED_CB(input_changed) // B
+	PORT_BIT( 0x0080, IP_ACTIVE_HIGH, IPT_BUTTON3 ) PORT_CHANGED_CB(input_changed) // C
+	PORT_BIT( 0x0100, IP_ACTIVE_HIGH, IPT_BUTTON4 ) PORT_CHANGED_CB(input_changed) // D
+	PORT_BIT( 0x0200, IP_ACTIVE_HIGH, IPT_VOLUME_DOWN ) PORT_CHANGED_CB(input_changed) PORT_NAME("Sound")
+	PORT_BIT( 0x0400, IP_ACTIVE_HIGH, IPT_SELECT ) PORT_CHANGED_CB(input_changed)
+	PORT_BIT( 0x0800, IP_ACTIVE_HIGH, IPT_POWER_OFF ) PORT_CHANGED_CB(input_changed)
+	PORT_BIT( 0x1000, IP_ACTIVE_HIGH, IPT_BUTTON5 ) PORT_CHANGED_CB(input_changed) PORT_NAME("Pause")
+	PORT_BIT( 0x2000, IP_ACTIVE_HIGH, IPT_START ) PORT_CHANGED_CB(input_changed)
 INPUT_PORTS_END
 
 
 
 /***************************************************************************
-
-  Machine Config
-
+    Machine Configs
 ***************************************************************************/
 
 void rzone_state::rzbatfor(machine_config &config)
 {
-	/* basic machine hardware */
+	// basic machine hardware
 	SM512(config, m_maincpu); // no external XTAL
 	m_maincpu->write_segs().set(FUNC(rzone_state::sm510_lcd_segment_w));
 	m_maincpu->read_k().set(FUNC(rzone_state::input_r));
 	m_maincpu->write_s().set(FUNC(rzone_state::t2_write_s));
 	m_maincpu->write_r().set(FUNC(rzone_state::t2_write_r));
 
-	/* video hardware */
+	// video hardware
 	screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_SVG));
 	screen.set_refresh_hz(60);
 	screen.set_size(1368, 1080);
@@ -263,14 +261,14 @@ void rzone_state::rzbatfor(machine_config &config)
 	TIMER(config, m_led_off).configure_generic(FUNC(rzone_state::led_off_callback));
 	config.set_default_layout(layout_rzone);
 
-	/* sound hardware */
+	// sound hardware
 	SPEAKER(config, "mono").front_center();
 	SPEAKER_SOUND(config, m_speaker).add_route(ALL_OUTPUTS, "mono", 0.25);
 }
 
 void rzone_state::rztoshden(machine_config &config)
 {
-	/* basic machine hardware */
+	// basic machine hardware
 	SM510(config, m_maincpu);
 	m_maincpu->set_r_mask_option(sm510_base_device::RMASK_DIRECT);
 	m_maincpu->write_segs().set(FUNC(rzone_state::sm510_lcd_segment_w));
@@ -278,7 +276,7 @@ void rzone_state::rztoshden(machine_config &config)
 	m_maincpu->write_s().set(FUNC(rzone_state::t1_write_s));
 	m_maincpu->write_r().set(FUNC(rzone_state::t1_write_r));
 
-	/* video hardware */
+	// video hardware
 	screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_SVG));
 	screen.set_refresh_hz(60);
 	screen.set_size(1392, 1080);
@@ -287,14 +285,14 @@ void rzone_state::rztoshden(machine_config &config)
 	TIMER(config, m_led_off).configure_generic(FUNC(rzone_state::led_off_callback));
 	config.set_default_layout(layout_rzone);
 
-	/* sound hardware */
+	// sound hardware
 	SPEAKER(config, "mono").front_center();
 	SPEAKER_SOUND(config, m_speaker).add_route(ALL_OUTPUTS, "mono", 0.25);
 }
 
 void rzone_state::rzindy500(machine_config &config)
 {
-	/* basic machine hardware */
+	// basic machine hardware
 	SM510(config, m_maincpu); // no external XTAL
 	m_maincpu->set_r_mask_option(sm510_base_device::RMASK_DIRECT); // confirmed
 	m_maincpu->write_segs().set(FUNC(rzone_state::sm510_lcd_segment_w));
@@ -302,7 +300,7 @@ void rzone_state::rzindy500(machine_config &config)
 	m_maincpu->write_s().set(FUNC(rzone_state::t1_write_s));
 	m_maincpu->write_r().set(FUNC(rzone_state::t1_write_r));
 
-	/* video hardware */
+	// video hardware
 	screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_SVG));
 	screen.set_refresh_hz(60);
 	screen.set_size(1425, 1080);
@@ -311,7 +309,7 @@ void rzone_state::rzindy500(machine_config &config)
 	TIMER(config, m_led_off).configure_generic(FUNC(rzone_state::led_off_callback));
 	config.set_default_layout(layout_rzone);
 
-	/* sound hardware */
+	// sound hardware
 	SPEAKER(config, "mono").front_center();
 	SPEAKER_SOUND(config, m_speaker).add_route(ALL_OUTPUTS, "mono", 0.25);
 }
@@ -319,9 +317,7 @@ void rzone_state::rzindy500(machine_config &config)
 
 
 /***************************************************************************
-
-  Game driver(s)
-
+    ROM Definitions
 ***************************************************************************/
 
 ROM_START( rzbatfor )
@@ -351,6 +347,13 @@ ROM_START( rzindy500 )
 	ROM_LOAD( "rzindy500.svg", 0, 533411, CRC(cfc85677) SHA1(014b9123d81fba1488b4a22a6b6fd0c09e22c1ea) )
 ROM_END
 
+} // anonymous namespace
+
+
+
+/***************************************************************************
+    Drivers
+***************************************************************************/
 
 //    YEAR  NAME       PARENT  COMPAT  MACHINE    INPUT  CLASS        INIT        COMPANY, FULLNAME, FLAGS
 CONS( 1995, rzbatfor,  0,      0,      rzbatfor,  rzone, rzone_state, empty_init, "Tiger Electronics", "R-Zone: Batman Forever", MACHINE_SUPPORTS_SAVE )
diff --git a/src/mame/includes/hh_sm510.h b/src/mame/includes/hh_sm510.h
index 37b56c338f2..133a39c5061 100644
--- a/src/mame/includes/hh_sm510.h
+++ b/src/mame/includes/hh_sm510.h
@@ -9,10 +9,18 @@
 #ifndef MAME_INCLUDES_HH_SM510_H
 #define MAME_INCLUDES_HH_SM510_H
 
+#pragma once
+
 #include "cpu/sm510/sm510.h"
+#include "cpu/sm510/sm511.h"
+#include "cpu/sm510/sm5a.h"
 #include "sound/spkrdev.h"
 
 
+#define PORT_CHANGED_CB(x) \
+	PORT_CHANGED_MEMBER(DEVICE_SELF, hh_sm510_state, x, 0)
+
+
 class hh_sm510_state : public driver_device
 {
 public: