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diff --git a/src/devices/cpu/mcs51/mcs51dasm.h b/src/devices/cpu/mcs51/mcs51dasm.h
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+// license:BSD-3-Clause
+// copyright-holders:Steve Ellenoff
+/*****************************************************************************
+ *
+ * i8051dasm.c
+ * Portable MCS-51 Family Emulator
+ *
+ * Chips in the family:
+ * 8051 Product Line (8031,8051,8751)
+ * 8052 Product Line (8032,8052,8752)
+ * 8054 Product Line (8054)
+ * 8058 Product Line (8058)
+ *
+ * Copyright Steve Ellenoff, all rights reserved.
+ *
+ * This work is based on:
+ * #1) 'Intel(tm) MC51 Microcontroller Family Users Manual' and
+ * #2) 8051 simulator by Travis Marlatte
+ * #3) Portable UPI-41/8041/8741/8042/8742 emulator V0.1 by Juergen Buchmueller (MAME CORE)
+ *
+ *****************************************************************************
+ * Symbol Memory Name Tables borrowed from:
+ * D52 8052 Disassembler - Copyright Jeffery L. Post
+ *****************************************************************************/
+
+#ifndef MAME_CPU_MCS51_MCS51DASM_H
+#define MAME_CPU_MCS51_MCS51DASM_H
+
+#pragma once
+
+class mcs51_disassembler : public util::disasm_interface
+{
+public:
+ struct mem_info {
+ int addr;
+ const char *name;
+ };
+
+ static const mem_info default_names[];
+ static const mem_info i8052_names[];
+ static const mem_info i80c52_names[];
+ static const mem_info ds5002fp_names[];
+ static const mem_info i8xc751_names[];
+
+ template<typename ...Names> mcs51_disassembler(Names &&... names) : mcs51_disassembler() {
+ add_names(names...);
+ }
+
+ mcs51_disassembler();
+ virtual ~mcs51_disassembler() = default;
+
+ template<typename ...Names> void add_names(const mem_info *info, Names &&... names)
+ {
+ add_names(names...);
+ add_names(info);
+ }
+
+ void add_names(const mem_info *info);
+
+ virtual u32 opcode_alignment() const override;
+ virtual offs_t disassemble(std::ostream &stream, offs_t pc, const data_buffer &opcodes, const data_buffer &params) override;
+
+private:
+ std::unordered_map<offs_t, const char *> m_names;
+
+ std::string get_data_address( uint8_t arg ) const;
+ std::string get_bit_address( uint8_t arg ) const;
+};
+
+class i8051_disassembler : public mcs51_disassembler
+{
+public:
+ i8051_disassembler();
+ virtual ~i8051_disassembler() = default;
+};
+
+class i8052_disassembler : public mcs51_disassembler
+{
+public:
+ i8052_disassembler();
+ virtual ~i8052_disassembler() = default;
+};
+
+class i80c51_disassembler : public mcs51_disassembler
+{
+public:
+ i80c51_disassembler();
+ virtual ~i80c51_disassembler() = default;
+};
+
+class i80c52_disassembler : public mcs51_disassembler
+{
+public:
+ i80c52_disassembler();
+ virtual ~i80c52_disassembler() = default;
+};
+
+class ds5002fp_disassembler : public mcs51_disassembler
+{
+public:
+ ds5002fp_disassembler();
+ virtual ~ds5002fp_disassembler() = default;
+};
+
+
+#endif