// license:BSD-3-Clause // copyright-holders:Peter Trauner /***************************************************************************** * * cpustate->h * portable lh5801 emulator interface * * *****************************************************************************/ #ifndef MAME_CPU_LH5801_LH5801_H #define MAME_CPU_LH5801_LH5801_H #pragma once /* lh5801 little endian ph, pl p sh, sl s xh, xl x yh, yl y uh, ul u a A 0 0 0 H V Z IE C TM 9bit polynomial? pu pv disp flipflops bf flipflop (break key connected) me0, me1 chip select for 2 64kb memory blocks in0-in7 input pins mi maskable interrupt input (fff8/9) timer fffa/b nmi non .. (fffc/d) reset fffe/f e ? lh5811 chip pa 8bit io pb 8bit io pc 8bit */ // input lines enum { LH5801_LINE_MI //maskable interrupt }; #define MCFG_LH5801_IN(_devcb) \ devcb = &downcast(*device).set_in_func(DEVCB_##_devcb); class lh5801_cpu_device : public cpu_device { public: // construction/destruction lh5801_cpu_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); // configuration helpers template devcb_base &set_in_func(Object &&cb) { return m_in_func.set_callback(std::forward(cb)); } 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 2; } virtual uint32_t execute_max_cycles() const override { return 19; } virtual uint32_t execute_input_lines() const override { return 2; } virtual bool execute_input_edge_triggered(int inputnum) const override { return inputnum == LH5801_LINE_MI || inputnum == INPUT_LINE_NMI; } virtual void execute_run() override; virtual void execute_set_input(int inputnum, 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: address_space_config m_program_config; address_space_config m_io_config; devcb_read8 m_in_func; address_space *m_program; //ME0 address_space *m_io; //ME1 memory_access_cache<0, 0, ENDIANNESS_LITTLE> *m_cache; PAIR m_s; PAIR m_p; PAIR m_u; PAIR m_x; PAIR m_y; int m_tm; //9 bit uint8_t m_t, m_a; int m_bf; int m_dp; int m_pu; int m_pv; uint16_t m_oldpc; int m_irq_state; uint8_t m_ir_flipflop[3]; //interrupt request flipflop: IR0, IR1, IR2 int m_lines_status[2]; //MI and NMI lines status int m_idle; int m_icount; void check_irq(); void lh5801_instruction_fd(); void lh5801_instruction(); uint8_t lh5801_add_generic(int left, int right, int carry); uint16_t lh5801_readop_word(); void lh5801_adc(uint8_t data); void lh5801_add_mem(address_space &space, int addr, uint8_t data); void lh5801_adr(PAIR *reg); void lh5801_sbc(uint8_t data); void lh5801_cpa(uint8_t a, uint8_t b); uint8_t lh5801_decimaladd_generic(int left, int right, int carry); void lh5801_dca(uint8_t data); void lh5801_dcs(uint8_t data); void lh5801_and(uint8_t data); void lh5801_and_mem(address_space &space, int addr, uint8_t data); void lh5801_bit(uint8_t a, uint8_t b); void lh5801_eor(uint8_t data); void lh5801_ora(uint8_t data); void lh5801_ora_mem(address_space &space, int addr, uint8_t data); void lh5801_lda(uint8_t data); void lh5801_lde(PAIR *reg); void lh5801_sde(PAIR *reg); void lh5801_lin(PAIR *reg); void lh5801_sin(PAIR *reg); void lh5801_dec(uint8_t *adr); void lh5801_inc(uint8_t *adr); void lh5801_pop(); void lh5801_pop_word(PAIR *reg); void lh5801_rtn(); void lh5801_rti(); void lh5801_push(uint8_t data); void lh5801_push_word(uint16_t data); void lh5801_jmp(uint16_t adr); void lh5801_branch_plus(int doit); void lh5801_branch_minus(int doit); void lh5801_lop(); void lh5801_sjp(); void lh5801_vector(int doit, int nr); void lh5801_aex(); void lh5801_drl(address_space &space, int adr); void lh5801_drr(address_space &space, int adr); void lh5801_rol(); void lh5801_ror(); void lh5801_shl(); void lh5801_shr(); void lh5801_am(int value); void lh5801_ita(); }; DECLARE_DEVICE_TYPE(LH5801, lh5801_cpu_device) #endif // MAME_CPU_LH5801_LH5801_H