// license:BSD-3-Clause // copyright-holders:AJR #ifndef MAME_CPU_MK1_MK1_H #define MAME_CPU_MK1_MK1_H #pragma once class mk1_cpu_device : public cpu_device { public: enum { MK1_PC, MK1_OP, MK1_W, MK1_IP, MK1_TOS, MK1_RS, MK1_PSP, MK1_RSP, MK1_A, MK1_B, MK1_ALU, MK1_F, MK1_IE }; static constexpr int AS_STACK = AS_DATA + 1; static constexpr int IRQ_LINE = 0; // device type constructor mk1_cpu_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock); protected: // device-level overrides virtual void device_start() override ATTR_COLD; virtual void device_reset() override ATTR_COLD; // device_execute_interface overrides virtual void execute_run() override; virtual void execute_set_input(int linenum, int state) override; // device_memory_interface overrides virtual space_config_vector memory_space_config() const override; // device_state_interface overrides virtual void state_string_export(const device_state_entry &entry, std::string &str) const override; // device_disasm_interface overrides virtual std::unique_ptr create_disassembler() override; private: // internal helpers void alu_update(); void set_alu_function(u8 data); void set_irq_enable(bool state); void execute_one(); static const u8 s_alu_decode[16]; // address spaces const address_space_config m_program_config; const address_space_config m_data_config; const address_space_config m_stack_config; memory_access<12, 0, 0, ENDIANNESS_LITTLE>::cache m_cache; memory_access<16, 0, 0, ENDIANNESS_LITTLE>::specific m_data; memory_access<10, 0, 0, ENDIANNESS_LITTLE>::specific m_stack; // internal state u16 m_pc; u8 m_inst; u8 m_op_latch; u16 m_index_reg[2]; u8 m_sp[2]; u8 m_alu_a; u8 m_alu_b; u8 m_alu_function; u8 m_alu_result; u8 m_cond_flags; bool m_irq_asserted; bool m_irq_enabled; s32 m_icount; }; // device type declaration DECLARE_DEVICE_TYPE(MK1_CPU, mk1_cpu_device) #endif // MAME_CPU_MK1_MK1_H