diff options
Diffstat (limited to 'src/mess/machine/fm_scsi.h')
-rw-r--r-- | src/mess/machine/fm_scsi.h | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/src/mess/machine/fm_scsi.h b/src/mess/machine/fm_scsi.h new file mode 100644 index 00000000000..1b8aaed981d --- /dev/null +++ b/src/mess/machine/fm_scsi.h @@ -0,0 +1,107 @@ +/* + * 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/scsi.h" +#include "machine/scsidev.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 + +// these aren't defined in scsi.h +#define SCSI_PHASE_BUS_FREE 8 +#define SCSI_PHASE_SELECT 9 + +struct FMSCSIinterface +{ + const SCSIConfigTable *scsidevs; /* SCSI devices */ + devcb_write_line irq_callback; /* irq callback */ + devcb_write_line drq_callback; /* drq callback */ +}; + +#define MCFG_FMSCSI_ADD(_tag, _intrf) \ + MCFG_DEVICE_ADD(_tag, FMSCSI, 0) \ + MCFG_DEVICE_CONFIG(_intrf) + +class fmscsi_device : public device_t, + public FMSCSIinterface +{ +public: + // construction/destruction + fmscsi_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); + + // any publically accessible interfaces needed for runtime + UINT8 fmscsi_data_r(void); + void fmscsi_data_w(UINT8 data); + UINT8 fmscsi_status_r(void); + void fmscsi_control_w(UINT8 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 line, UINT8 state); + UINT8 get_input_line(UINT8 line); + void set_output_line(UINT8 line, UINT8 state); + UINT8 get_output_line(UINT8 line); + +protected: + // device-level overrides (none are required, but these are common) + virtual void device_start(); + virtual void device_reset(); + virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr); + virtual void device_config_complete(); + +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 cbyte); + + devcb_resolved_write_line m_irq_func; + devcb_resolved_write_line m_drq_func; + + scsidev_device* m_SCSIdevices[8]; + UINT8 m_command[32]; + UINT8 m_result[32]; + UINT8 m_command_index; + int m_result_length; + UINT32 m_result_index; + UINT8 m_input_lines; + UINT8 m_output_lines; + UINT8 m_data; + UINT8 m_last_id; + UINT8 m_phase; + UINT8 m_target; + UINT8 m_buffer[512]; + emu_timer* m_transfer_timer; + emu_timer* m_phase_timer; +}; + +extern const device_type FMSCSI; + +#endif /* FM_SCSI_H_ */ |