// license:BSD-3-Clause // copyright-holders:David Shah, David Haywood /*************************************************************************** m6502_swap_op_d5_d6.h 6502 / N2A03 with instruction scrambling ***************************************************************************/ #ifndef MAME_M6502_SWAP_OP_D5_D6_H #define MAME_M6502_SWAP_OP_D5_D6_H #pragma once #include "cpu/m6502/n2a03.h" #include "cpu/m6502/n2a03d.h" class m6502_swap_op_d5_d6 : public m6502_device { public: m6502_swap_op_d5_d6(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); void set_encryption_state(bool state); protected: class mi_decrypt : public mi_default { public: bool m_encryption_enabled; virtual ~mi_decrypt() {} virtual uint8_t read_sync(uint16_t adr) override; uint8_t descramble(uint8_t op); }; class disassembler : public m6502_disassembler { public: mi_decrypt *mintf; disassembler(mi_decrypt *m); virtual ~disassembler() = default; virtual u32 interface_flags() const override; virtual u8 decrypt8(u8 value, offs_t pc, bool opcode) const override; }; virtual void device_reset() override; virtual void device_start() override; virtual std::unique_ptr create_disassembler() override; }; class n2a03_core_swap_op_d5_d6 : public n2a03_core_device { public: n2a03_core_swap_op_d5_d6(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); void set_encryption_state(bool state); protected: class mi_decrypt : public mi_default { public: bool m_encryption_enabled; virtual ~mi_decrypt() {} virtual uint8_t read_sync(uint16_t adr) override; uint8_t descramble(uint8_t op); }; class disassembler : public n2a03_disassembler { public: mi_decrypt *mintf; disassembler(mi_decrypt *m); virtual ~disassembler() = default; virtual u32 interface_flags() const override; virtual u8 decrypt8(u8 value, offs_t pc, bool opcode) const override; }; virtual void device_reset() override; virtual void device_start() override; virtual std::unique_ptr create_disassembler() override; }; DECLARE_DEVICE_TYPE(M6502_SWAP_OP_D5_D6, m6502_swap_op_d5_d6) DECLARE_DEVICE_TYPE(N2A03_CORE_SWAP_OP_D5_D6, n2a03_core_swap_op_d5_d6) #endif // MAME_M6502_SWAP_OP_D5_D6_H