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diff --git a/src/devices/cpu/rw5000/rw5000d.h b/src/devices/cpu/rw5000/rw5000d.h
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+// license:BSD-3-Clause
+// copyright-holders:hap
+/*
+
+ Rockwell A/B5000 family MCU disassembler
+
+*/
+
+#ifndef MAME_CPU_RW5000_RW5000D_H
+#define MAME_CPU_RW5000_RW5000D_H
+
+#pragma once
+
+
+class rw5000_common_disassembler : public util::disasm_interface
+{
+public:
+ rw5000_common_disassembler();
+ virtual ~rw5000_common_disassembler() = default;
+
+ virtual u32 opcode_alignment() const override { return 1; }
+ virtual u32 interface_flags() const override { return NONLINEAR_PC | PAGED; }
+ virtual u32 page_address_bits() const override { return 6; }
+ virtual offs_t pc_linear_to_real(offs_t pc) const override { return (pc & ~0x3f) | m_l2r[pc & 0x3f]; }
+ virtual offs_t pc_real_to_linear(offs_t pc) const override { return (pc & ~0x3f) | m_r2l[pc & 0x3f]; }
+
+protected:
+ enum e_mnemonics : unsigned;
+ static const char *const s_name[];
+ static const u8 s_bits[];
+ static const u32 s_flags[];
+
+ u8 m_l2r[0x40];
+ u8 m_r2l[0x40];
+
+ offs_t increment_pc(offs_t pc);
+ offs_t common_disasm(const u8 *lut_opmap, std::ostream &stream, offs_t pc, const data_buffer &opcodes, const data_buffer &params);
+};
+
+class a5000_disassembler : public rw5000_common_disassembler
+{
+public:
+ a5000_disassembler() = default;
+ virtual ~a5000_disassembler() = default;
+
+ virtual offs_t disassemble(std::ostream &stream, offs_t pc, const data_buffer &opcodes, const data_buffer &params) override;
+
+private:
+ static const u8 a5000_opmap[0x100];
+};
+
+class a5500_disassembler : public rw5000_common_disassembler
+{
+public:
+ a5500_disassembler() = default;
+ virtual ~a5500_disassembler() = default;
+
+ virtual offs_t disassemble(std::ostream &stream, offs_t pc, const data_buffer &opcodes, const data_buffer &params) override;
+
+private:
+ static const u8 a5500_opmap[0x100];
+};
+
+class b5000_disassembler : public rw5000_common_disassembler
+{
+public:
+ b5000_disassembler() = default;
+ virtual ~b5000_disassembler() = default;
+
+ virtual offs_t disassemble(std::ostream &stream, offs_t pc, const data_buffer &opcodes, const data_buffer &params) override;
+
+private:
+ static const u8 b5000_opmap[0x100];
+};
+
+class b5500_disassembler : public rw5000_common_disassembler
+{
+public:
+ b5500_disassembler() = default;
+ virtual ~b5500_disassembler() = default;
+
+ virtual offs_t disassemble(std::ostream &stream, offs_t pc, const data_buffer &opcodes, const data_buffer &params) override;
+
+private:
+ static const u8 b5500_opmap[0x100];
+};
+
+class b6000_disassembler : public rw5000_common_disassembler
+{
+public:
+ b6000_disassembler() = default;
+ virtual ~b6000_disassembler() = default;
+
+ virtual offs_t disassemble(std::ostream &stream, offs_t pc, const data_buffer &opcodes, const data_buffer &params) override;
+
+private:
+ static const u8 b6000_opmap[0x100];
+};
+
+class b6100_disassembler : public rw5000_common_disassembler
+{
+public:
+ b6100_disassembler() = default;
+ virtual ~b6100_disassembler() = default;
+
+ virtual offs_t disassemble(std::ostream &stream, offs_t pc, const data_buffer &opcodes, const data_buffer &params) override;
+
+private:
+ static const u8 b6100_opmap[0x100];
+};
+
+#endif // MAME_CPU_RW5000_RW5000D_H