// license:BSD-3-Clause // copyright-holders:Juergen Buchmueller #pragma once #ifndef __S2650_H__ #define __S2650_H__ #define S2650_SENSE_LINE INPUT_LINE_IRQ1 enum { S2650_PC=1, S2650_PS, S2650_R0, S2650_R1, S2650_R2, S2650_R3, S2650_R1A, S2650_R2A, S2650_R3A, S2650_HALT, S2650_SI, S2650_FO }; /* fake I/O space ports */ enum { S2650_EXT_PORT = 0x00ff, /* M/~IO=0 D/~C=x E/~NE=1 */ S2650_CTRL_PORT = 0x0100, /* M/~IO=0 D/~C=0 E/~NE=0 */ S2650_DATA_PORT = 0x0101, /* M/~IO=0 D/~C=1 E/~NE=0 */ S2650_SENSE_PORT = 0x0102 /* Fake Sense Line */ }; extern const device_type S2650; #define MCFG_S2650_FLAG_HANDLER(_devcb) \ devcb = &s2650_device::set_flag_handler(*device, DEVCB_##_devcb); #define MCFG_S2650_INTACK_HANDLER(_devcb) \ devcb = &s2650_device::set_intack_handler(*device, DEVCB_##_devcb); class s2650_device : public cpu_device { public: // construction/destruction s2650_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); // static configuration helpers template static devcb_base &set_flag_handler(device_t &device, _Object object) { return downcast(device).m_flag_handler.set_callback(object); } template static devcb_base &set_intack_handler(device_t &device, _Object object) { return downcast(device).m_intack_handler.set_callback(object); } protected: // device-level overrides virtual void device_start() override; virtual void device_reset() override; // device_execute_interface overrides virtual uint32_t execute_min_cycles() const override { return 5; } virtual uint32_t execute_max_cycles() const override { return 13; } virtual uint32_t execute_input_lines() const override { return 2; } virtual uint32_t execute_default_irq_vector() const override { return 0; } virtual void execute_run() override; virtual void execute_set_input(int inputnum, int state) override; // device_memory_interface overrides virtual const address_space_config *memory_space_config(address_spacenum spacenum = AS_0) const override { return (spacenum == AS_PROGRAM) ? &m_program_config : ( (spacenum == AS_IO) ? &m_io_config : nullptr ); } // device_state_interface overrides virtual void state_import(const device_state_entry &entry) override; virtual void state_export(const device_state_entry &entry) override; virtual void state_string_export(const device_state_entry &entry, std::string &str) const override; // device_disasm_interface overrides virtual uint32_t disasm_min_opcode_bytes() const override { return 1; } virtual uint32_t disasm_max_opcode_bytes() const override { return 3; } virtual offs_t disasm_disassemble(char *buffer, offs_t pc, const uint8_t *oprom, const uint8_t *opram, uint32_t options) override; private: address_space_config m_program_config; address_space_config m_io_config; devcb_write_line m_flag_handler; devcb_write_line m_intack_handler; uint16_t m_ppc; /* previous program counter (page + iar) */ uint16_t m_page; /* 8K page select register (A14..A13) */ uint16_t m_iar; /* instruction address register (A12..A0) */ uint16_t m_ea; /* effective address (A14..A0) */ uint8_t m_psl; /* processor status lower */ uint8_t m_psu; /* processor status upper */ uint8_t m_r; /* absolute addressing dst/src register */ uint8_t m_reg[7]; /* 7 general purpose registers */ uint8_t m_halt; /* 1 if cpu is halted */ uint8_t m_ir; /* instruction register */ uint16_t m_ras[8]; /* 8 return address stack entries */ uint8_t m_irq_state; int m_icount; address_space *m_program; direct_read_data *m_direct; address_space *m_io; // For debugger uint16_t m_debugger_temp; inline void set_psu(uint8_t new_val); inline uint8_t get_sp(); inline void set_sp(uint8_t new_sp); inline int check_irq_line(); inline uint8_t ROP(); inline uint8_t ARG(); void s2650_set_flag(int state); int s2650_get_flag(); void s2650_set_sense(int state); }; #endif /* __S2650_H__ */