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Diffstat (limited to 'src/mess/machine/ieee488.h')
-rw-r--r-- | src/mess/machine/ieee488.h | 226 |
1 files changed, 226 insertions, 0 deletions
diff --git a/src/mess/machine/ieee488.h b/src/mess/machine/ieee488.h new file mode 100644 index 00000000000..87a01af0141 --- /dev/null +++ b/src/mess/machine/ieee488.h @@ -0,0 +1,226 @@ +/********************************************************************** + + IEEE-488.1 General Purpose Interface Bus emulation + (aka HP-IB, GPIB, CBM IEEE) + + Copyright MESS Team. + Visit http://mamedev.org for licensing and usage restrictions. + +**********************************************************************/ + +#pragma once + +#ifndef __IEEE488__ +#define __IEEE488__ + +#include "emu.h" + + + +//************************************************************************** +// MACROS / CONSTANTS +//************************************************************************** + +#define IEEE488_TAG "ieee_bus" + + + +//************************************************************************** +// INTERFACE CONFIGURATION MACROS +//************************************************************************** + +#define MCFG_IEEE488_BUS_ADD(_config) \ + MCFG_DEVICE_ADD(IEEE488_TAG, IEEE488, 0) \ + MCFG_DEVICE_CONFIG(_config) + + +#define IEEE488_INTERFACE(_name) \ + const ieee488_interface (_name) = + + +#define MCFG_IEEE488_SLOT_ADD(_tag, _num, _slot_intf, _def_slot, _def_inp) \ + MCFG_DEVICE_ADD(_tag, IEEE488_SLOT, 0) \ + MCFG_DEVICE_SLOT_INTERFACE(_slot_intf, _def_slot, _def_inp, false) \ + ieee488_slot_device::static_set_slot(*device, _num); + + + +//************************************************************************** +// TYPE DEFINITIONS +//************************************************************************** + +// ======================> ieee488_interface + +struct ieee488_interface +{ + devcb_write_line m_out_eoi_cb; + devcb_write_line m_out_dav_cb; + devcb_write_line m_out_nrfd_cb; + devcb_write_line m_out_ndac_cb; + devcb_write_line m_out_ifc_cb; + devcb_write_line m_out_srq_cb; + devcb_write_line m_out_atn_cb; + devcb_write_line m_out_ren_cb; +}; + + +// ======================> ieee488_device + +class device_ieee488_interface; + +class ieee488_device : public device_t, + public ieee488_interface +{ +public: + // construction/destruction + ieee488_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); + + void add_device(device_t *target, int address); + + // reads for both host and peripherals + UINT8 dio_r(); + READ8_MEMBER( dio_r ); + DECLARE_READ_LINE_MEMBER( eoi_r ); + DECLARE_READ_LINE_MEMBER( dav_r ); + DECLARE_READ_LINE_MEMBER( nrfd_r ); + DECLARE_READ_LINE_MEMBER( ndac_r ); + DECLARE_READ_LINE_MEMBER( ifc_r ); + DECLARE_READ_LINE_MEMBER( srq_r ); + DECLARE_READ_LINE_MEMBER( atn_r ); + DECLARE_READ_LINE_MEMBER( ren_r ); + + // writes for host (driver_device) + void dio_w(UINT8 data); + WRITE8_MEMBER( dio_w ); + DECLARE_WRITE_LINE_MEMBER( eoi_w ); + DECLARE_WRITE_LINE_MEMBER( dav_w ); + DECLARE_WRITE_LINE_MEMBER( nrfd_w ); + DECLARE_WRITE_LINE_MEMBER( ndac_w ); + DECLARE_WRITE_LINE_MEMBER( ifc_w ); + DECLARE_WRITE_LINE_MEMBER( srq_w ); + DECLARE_WRITE_LINE_MEMBER( atn_w ); + DECLARE_WRITE_LINE_MEMBER( ren_w ); + + // writes for peripherals (device_t) + void dio_w(device_t *device, UINT8 data); + void eoi_w(device_t *device, int state); + void dav_w(device_t *device, int state); + void nrfd_w(device_t *device, int state); + void ndac_w(device_t *device, int state); + void ifc_w(device_t *device, int state); + void srq_w(device_t *device, int state); + void atn_w(device_t *device, int state); + void ren_w(device_t *device, int state); + +protected: + enum + { + EOI = 0, + DAV, + NRFD, + NDAC, + IFC, + SRQ, + ATN, + REN, + SIGNAL_COUNT + }; + + // device-level overrides + virtual void device_start(); + virtual void device_config_complete(); + virtual void device_stop(); + + class daisy_entry + { + public: + daisy_entry(device_t *device); + daisy_entry *next() const { return m_next; } + + daisy_entry * m_next; // next device + device_t * m_device; // associated device + device_ieee488_interface * m_interface; // associated device's daisy interface + + int m_line[SIGNAL_COUNT]; + UINT8 m_dio; + }; + + simple_list<daisy_entry> m_device_list; + +private: + devcb_resolved_write_line m_out_eoi_func; + devcb_resolved_write_line m_out_dav_func; + devcb_resolved_write_line m_out_nrfd_func; + devcb_resolved_write_line m_out_ndac_func; + devcb_resolved_write_line m_out_ifc_func; + devcb_resolved_write_line m_out_srq_func; + devcb_resolved_write_line m_out_atn_func; + devcb_resolved_write_line m_out_ren_func; + + inline void set_signal(device_t *device, int signal, int state); + inline int get_signal(int signal); + inline void set_data(device_t *device, UINT8 data); + inline UINT8 get_data(); + + int m_line[SIGNAL_COUNT]; + UINT8 m_dio; +}; + + +// ======================> ieee488_slot_device + +class ieee488_slot_device : public device_t, + public device_slot_interface +{ +public: + // construction/destruction + ieee488_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); + + // device-level overrides + virtual void device_start(); + + // inline configuration + static void static_set_slot(device_t &device, int address); + +private: + // configuration + int m_address; +}; + + +// ======================> device_ieee488_interface + +class device_ieee488_interface : public device_slot_card_interface +{ + friend class ieee488_device; + +public: + // construction/destruction + device_ieee488_interface(const machine_config &mconfig, device_t &device); + virtual ~device_ieee488_interface(); + + device_ieee488_interface *next() const { return m_next; } + device_ieee488_interface *m_next; + + // optional operation overrides + virtual void ieee488_eoi(int state) { }; + virtual void ieee488_dav(int state) { }; + virtual void ieee488_nrfd(int state) { }; + virtual void ieee488_ndac(int state) { }; + virtual void ieee488_ifc(int state) { }; + virtual void ieee488_srq(int state) { }; + virtual void ieee488_atn(int state) { }; + virtual void ieee488_ren(int state) { }; + + ieee488_device *m_bus; + int m_address; +}; + + +// device type definition +extern const device_type IEEE488; +extern const device_type IEEE488_SLOT; + + + +#endif |