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author | 2014-03-18 11:46:44 +0000 | |
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committer | 2014-03-18 11:46:44 +0000 | |
commit | f65e037141714318cfd32ecf988a7993f6cd9b3f (patch) | |
tree | 4c9a58e4b763733d3e2e80a409da026626978cc7 /src/emu/machine/mb89352.h | |
parent | 15b2c80c62e9eddad3a6322fdef9c22039ce1eaa (diff) |
(MESS) Moved common machine and video chips to emu. (nw)
Diffstat (limited to 'src/emu/machine/mb89352.h')
-rw-r--r-- | src/emu/machine/mb89352.h | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/src/emu/machine/mb89352.h b/src/emu/machine/mb89352.h new file mode 100644 index 00000000000..91618e083c6 --- /dev/null +++ b/src/emu/machine/mb89352.h @@ -0,0 +1,123 @@ +/* + * mb89352.h + * + * Created on: 16/01/2011 + */ + +#ifndef MB89352_H_ +#define MB89352_H_ + +#include "machine/scsihle.h" + +// SCSI lines readable via PSNS register (reg 5) +#define MB89352_LINE_REQ 0x80 +#define MB89352_LINE_ACK 0x40 +#define MB89352_LINE_ATN 0x20 +#define MB89352_LINE_SEL 0x10 +#define MB89352_LINE_BSY 0x08 +#define MB89352_LINE_MSG 0x04 +#define MB89352_LINE_CD 0x02 +#define MB89352_LINE_IO 0x01 + +// INTS bits +#define INTS_RESET 0x01 +#define INTS_HARD_ERROR 0x02 +#define INTS_TIMEOUT 0x04 +#define INTS_SERVICE_REQUIRED 0x08 +#define INTS_COMMAND_COMPLETE 0x10 +#define INTS_DISCONNECTED 0x20 +#define INTS_RESELECTION 0x40 +#define INTS_SELECTION 0x80 + +// SSTS status bits +#define SSTS_DREG_EMPTY 0x01 +#define SSTS_DREG_FULL 0x02 +#define SSTS_TC_ZERO 0x04 +#define SSTS_SCSI_RST 0x08 +#define SSTS_XFER_IN_PROGRESS 0x10 +#define SSTS_SPC_BSY 0x20 +#define SSTS_TARG_CONNECTED 0x40 +#define SSTS_INIT_CONNECTED 0x80 + +// SERR error status bits +#define SERR_OFFSET 0x01 +#define SERR_SHORT_XFR 0x02 +#define SERR_PHASE_ERR 0x04 +#define SERR_TC_PAR 0x08 +#define SERR_SPC_PAR 0x40 +#define SERR_SCSI_PAR 0x80 + + +struct mb89352_interface +{ + devcb_write_line irq_callback; /* irq callback */ + devcb_write_line drq_callback; /* drq callback */ +}; + +#define MCFG_MB89352A_ADD(_tag, _intrf) \ + MCFG_DEVICE_ADD(_tag, MB89352A, 0) \ + MCFG_DEVICE_CONFIG(_intrf) + +class mb89352_device : public device_t, + public mb89352_interface +{ +public: + // construction/destruction + mb89352_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); + + // any publically accessible interfaces needed for runtime + DECLARE_READ8_MEMBER( mb89352_r ); + DECLARE_WRITE8_MEMBER( mb89352_w ); + + void set_phase(int phase); + int get_phase(void); + +protected: + // device-level overrides (none are required, but these are common) + virtual void device_start(); + virtual void device_reset(); + virtual void device_stop(); + virtual void device_config_complete(); + virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr); + +private: + // internal device state goes here + static const device_timer_id TIMER_TRANSFER = 0; + + int get_scsi_cmd_len(UINT8 cbyte); + //void set_ints(UINT8 flag); + + devcb_resolved_write_line m_irq_func; + devcb_resolved_write_line m_drq_func; + + scsihle_device* m_SCSIdevices[8]; + + UINT8 m_phase; // current SCSI phase + UINT8 m_target; // current SCSI target + UINT8 m_bdid; // Bus device ID (SCSI ID of the bus?) + UINT8 m_ints; // Interrupt Sense + UINT8 m_temp; // Temporary register (To/From SCSI bus) + UINT8 m_data; // Data register + UINT8 m_scmd; // SPC Command register + UINT32 m_transfer_count; // byte transfer counter, also used as a timeout counter for selection. + UINT8 m_int_enable; + UINT8 m_sel_enable; + UINT8 m_resel_enable; + UINT8 m_parity_enable; + UINT8 m_arbit_enable; + UINT8 m_busfree_int_enable; + UINT8 m_line_status; + UINT8 m_spc_status; + UINT8 m_error_status; + UINT8 m_command_index; + UINT8 m_command[16]; + UINT32 m_transfer_index; + int m_result_length; + UINT8 m_buffer[512]; + + emu_timer* m_transfer_timer; +}; + +extern const device_type MB89352A; + +#endif /* MB89352_H_ */ |