// license:BSD-3-Clause // copyright-holders:Barry Rodewald /* * fm_scsi.h * * SCSI controller used in Fujitsu FMR-50, FMR-60, and FM-Towns * */ #ifndef FM_SCSI_H_ #define FM_SCSI_H_ #include "machine/legscsi.h" // SCSI input lines (from target) #define FMSCSI_LINE_REQ 0x80 #define FMSCSI_LINE_IO 0x40 #define FMSCSI_LINE_MSG 0x20 #define FMSCSI_LINE_CD 0x10 #define FMSCSI_LINE_BSY 0x08 #define FMSCSI_LINE_EX 0x04 #define FMSCSI_LINE_INT 0x02 #define FMSCSI_LINE_PERR 0x01 // SCSI output lines (to target) #define FMSCSI_LINE_WEN 0x80 #define FMSCSI_LINE_IMSK 0x40 #define FMSCSI_LINE_RMSK 0x20 #define FMSCSI_LINE_ATN 0x10 #define FMSCSI_LINE_WRD 0x08 #define FMSCSI_LINE_SEL 0x04 #define FMSCSI_LINE_DMAE 0x02 #define FMSCSI_LINE_RST 0x01 #define MCFG_FMSCSI_ADD(_tag) \ MCFG_DEVICE_ADD(_tag, FMSCSI, 0) #define MCFG_FMSCSI_IRQ_HANDLER(_devcb) \ devcb = &fmscsi_device::set_irq_handler(*device, DEVCB_##_devcb); #define MCFG_FMSCSI_DRQ_HANDLER(_devcb) \ devcb = &fmscsi_device::set_drq_handler(*device, DEVCB_##_devcb); class fmscsi_device : public legacy_scsi_host_adapter { public: // construction/destruction fmscsi_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); // static configuration helpers template static devcb_base &set_irq_handler(device_t &device, _Object object) { return downcast(device).m_irq_handler.set_callback(object); } template static devcb_base &set_drq_handler(device_t &device, _Object object) { return downcast(device).m_drq_handler.set_callback(object); } // any publically accessible interfaces needed for runtime uint8_t fmscsi_data_r(void); void fmscsi_data_w(uint8_t data); uint8_t fmscsi_status_r(void); void fmscsi_control_w(uint8_t data); DECLARE_READ8_MEMBER( fmscsi_r ); DECLARE_WRITE8_MEMBER( fmscsi_w ); void set_phase(int phase); int get_phase(void); void set_input_line(uint8_t line, uint8_t state); uint8_t get_input_line(uint8_t line); void set_output_line(uint8_t line, uint8_t state); uint8_t get_output_line(uint8_t line); protected: // device-level overrides (none are required, but these are common) virtual void device_start() override; virtual void device_reset() override; virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override; private: // internal device state goes here static const device_timer_id TIMER_TRANSFER = 0; static const device_timer_id TIMER_PHASE = 1; int get_scsi_cmd_len(uint8_t cbyte); void stop_transfer(); devcb_write_line m_irq_handler; devcb_write_line m_drq_handler; uint8_t m_command[32]; //uint8_t m_result[32]; uint8_t m_command_index; int m_result_length; uint32_t m_result_index; uint8_t m_input_lines; uint8_t m_output_lines; uint8_t m_data; uint8_t m_last_id; uint8_t m_phase; uint8_t m_target; uint8_t m_buffer[512]; emu_timer* m_transfer_timer; emu_timer* m_phase_timer; }; extern const device_type FMSCSI; #endif /* FM_SCSI_H_ */