sm500 file placeholders

scripts/src/cpu.lua

@@ -1716,6 +1716,11 @@ if (CPUS["SM510"]~=null) then
 		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/sm500.cpp",
+		MAME_DIR .. "src/devices/cpu/sm510/sm500.h",
+		MAME_DIR .. "src/devices/cpu/sm510/sm500op.cpp",
+		MAME_DIR .. "src/devices/cpu/sm510/sm500core.cpp",
+		MAME_DIR .. "src/devices/cpu/sm510/kb1013vk1-2core.cpp",
 	}
 end
 

src/devices/cpu/sm510/kb1013vk1-2core.cpp

@@ -0,0 +1,11 @@
+// license:BSD-3-Clause
+// copyright-holders:hap, Igor
+/*
+
+  KB1013VK1-2 MCU core implementation
+
+*/
+
+#include "sm500.h"
+#include "debugger.h"
+

src/devices/cpu/sm510/sm500.cpp

@@ -0,0 +1,8 @@
+// license:BSD-3-Clause
+// copyright-holders:hap, Igor
+/*
+
+*/
+
+#include "sm500.h"
+#include "debugger.h"

src/devices/cpu/sm510/sm500.h

@@ -0,0 +1,60 @@
+// license:BSD-3-Clause
+// copyright-holders:hap, Igor
+/*
+
+  Sharp SM500 MCU family cores
+
+*/
+
+#ifndef _SM500_H_
+#define _SM500_H_
+
+#include "sm510.h"
+
+
+// I/O ports setup
+
+// ..
+
+
+// pinout reference
+
+/*
+
+         O33 O43 O12 O22 O32 GND O42 O11 O21 O31 O41 OS1
+         36  35  34  33  32  31  30  29  28  27  26  25
+        ________________________________________________
+       |                                                |
+O23 37 |                                                | 24 OS2
+O13 38 |                                                | 23 OS3
+O44 39 |                                                | 22 OS4
+O34 40 |                                                | 21 H1
+O24 41 |                                                | 20 H2
+O14 42 |                     SM500                      | 19 VM
+O45 43 |                                                | 18 OSCin
+O35 44 |                                                | 17 OSCout
+O25 45 |                                                | 16 VDD
+O15 46 |                                                | 15 K4
+O46 47 |                                                | 14 K3
+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
+*/
+
+class sm500_device : public sm510_base_device
+{
+public:
+	sm500_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+protected:
+	virtual offs_t disasm_disassemble(char *buffer, offs_t pc, const UINT8 *oprom, const UINT8 *opram, UINT32 options) override;
+};
+
+
+
+extern const device_type SM500;
+
+
+#endif /* _SM500_H_ */

src/devices/cpu/sm510/sm500core.cpp

@@ -0,0 +1,38 @@
+// license:BSD-3-Clause
+// copyright-holders:hap, Igor
+/*
+
+  Sharp SM500 MCU core implementation
+
+*/
+
+#include "sm500.h"
+#include "debugger.h"
+
+
+// MCU types
+const device_type SM500 = &device_creator<sm500_device>;
+
+
+// internal memory maps
+static ADDRESS_MAP_START(program_2_7k, AS_PROGRAM, 8, sm510_base_device)
+	AM_RANGE(0x0000, 0x00ff) AM_ROM
+ADDRESS_MAP_END
+
+static ADDRESS_MAP_START(data_96_32x4, AS_DATA, 8, sm510_base_device)
+	AM_RANGE(0x00, 0x1f) AM_RAM
+ADDRESS_MAP_END
+
+
+// device definitions
+sm500_device::sm500_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+	: sm510_base_device(mconfig, SM500, "SM500", tag, owner, clock, 2 /* stack levels */, 12 /* prg width */, ADDRESS_MAP_NAME(program_2_7k), 7 /* data width */, ADDRESS_MAP_NAME(data_96_32x4), "sm500", __FILE__)
+{ }
+
+
+// disasm
+offs_t sm500_device::disasm_disassemble(char *buffer, offs_t pc, const UINT8 *oprom, const UINT8 *opram, UINT32 options)
+{
+	extern CPU_DISASSEMBLE(sm510);
+	return CPU_DISASSEMBLE_NAME(sm510)(this, buffer, pc, oprom, opram, options);
+}

src/devices/cpu/sm510/sm500op.cpp

@@ -0,0 +1,6 @@
+// license:BSD-3-Clause
+// copyright-holders:hap, Igor
+
+// SM500 opcode handlers
+
+#include "sm500.h"

src/devices/cpu/sm510/sm510.cpp

@@ -2,17 +2,24 @@
 // copyright-holders:hap
 /*
 
-  Sharp SM510 MCU family - known chips:
+  Known chips: (* means not emulated yet)
+  
+  Sharp SM510 MCU family:
   - SM510: 2.7Kx8 ROM, 128x4 RAM(32x4 for LCD)
   - SM511: 4Kx8 ROM, 128x4 RAM(32x4 for LCD), melody controller
   - SM512: 4Kx8 ROM, 128x4 RAM(48x4 for LCD), melody controller
+  - *KB1013VK4-2: Soviet-era clone of SM510, minor differences
 
-  Other chips that may be in the same family, investigate more when one of
-  them needs to get emulated: SM500, SM530/31, SM4A, SM3903, ..
-
+  Sharp SM500 MCU family:
+  - *SM500: x
+  - *SM530: x
+  - *SM531: x
+  - *KB1013VK1-2: Soviet-era clone of SM500, minor differences
+  
   References:
   - 1990 Sharp Microcomputers Data Book
   - 1996 Sharp Microcomputer Databook
+  - KB1013VK1-2/KB1013VK4-2 manual
 
   TODO:
   - proper support for LFSR program counter in debugger
@@ -59,35 +66,6 @@ void sm510_base_device::device_start()
 	m_write_segbs.resolve_safe();
 	m_write_segc.resolve_safe();
 
-	// zerofill
-	memset(m_stack, 0, sizeof(m_stack));
-	m_pc = 0;
-	m_prev_pc = 0;
-	m_op = 0;
-	m_prev_op = 0;
-	m_param = 0;
-	m_acc = 0;
-	m_bl = 0;
-	m_bm = 0;
-	m_c = 0;
-	m_skip = false;
-	m_w = 0;
-	m_r = 0;
-	m_div = 0;
-	m_1s = false;
-	m_k_active = false;
-	m_l = 0;
-	m_x = 0;
-	m_y = 0;
-	m_bp = false;
-	m_bc = false;
-	m_halt = false;
-	m_melody_rd = 0;
-	m_melody_step_count = 0;
-	m_melody_duty_count = 0;
-	m_melody_duty_index = 0;
-	m_melody_address = 0;
-
 	// register for savestates
 	save_item(NAME(m_stack));
 	save_item(NAME(m_pc));