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Diffstat (limited to 'src/mess/machine/econet.h')
-rw-r--r-- | src/mess/machine/econet.h | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/src/mess/machine/econet.h b/src/mess/machine/econet.h new file mode 100644 index 00000000000..ac3ef61e595 --- /dev/null +++ b/src/mess/machine/econet.h @@ -0,0 +1,175 @@ +/********************************************************************** + + Acorn Computers Econet local area network emulation + + Copyright MESS Team. + Visit http://mamedev.org for licensing and usage restrictions. + +**********************************************************************/ + +#pragma once + +#ifndef __ECONET__ +#define __ECONET__ + +#include "emu.h" + + + +//************************************************************************** +// MACROS / CONSTANTS +//************************************************************************** + +#define ECONET_TAG "econet" + + + +//************************************************************************** +// INTERFACE CONFIGURATION MACROS +//************************************************************************** + +#define MCFG_ECONET_ADD(_config) \ + MCFG_DEVICE_ADD(ECONET_TAG, ECONET, 0) \ + MCFG_DEVICE_CONFIG(_config) + + +#define ECONET_INTERFACE(_name) \ + const econet_interface (_name) = + + +#define MCFG_ECONET_SLOT_ADD(_tag, _num, _slot_intf, _def_slot, _def_inp) \ + MCFG_DEVICE_ADD(_tag, ECONET_SLOT, 0) \ + MCFG_DEVICE_SLOT_INTERFACE(_slot_intf, _def_slot, _def_inp, false) \ + econet_slot_device::static_set_slot(*device, _num); + + + +//************************************************************************** +// TYPE DEFINITIONS +//************************************************************************** + +// ======================> econet_interface + +struct econet_interface +{ + devcb_write_line m_out_clk_cb; + devcb_write_line m_out_data_cb; +}; + + +// ======================> econet_device + +class device_econet_interface; + +class econet_device : public device_t, + public econet_interface +{ +public: + // construction/destruction + econet_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 + DECLARE_READ_LINE_MEMBER( clk_r ); + DECLARE_READ_LINE_MEMBER( data_r ); + + // writes for host (driver_device) + DECLARE_WRITE_LINE_MEMBER( clk_w ); + DECLARE_WRITE_LINE_MEMBER( data_w ); + + // writes for peripherals (device_t) + void clk_w(device_t *device, int state); + void data_w(device_t *device, int state); + +protected: + enum + { + CLK = 0, + DATA, + SIGNAL_COUNT + }; + + // device-level overrides + virtual void device_config_complete(); + virtual void device_start(); + 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_econet_interface * m_interface; // associated device's daisy interface + + int m_line[SIGNAL_COUNT]; + }; + + simple_list<daisy_entry> m_device_list; + +private: + devcb_resolved_write_line m_out_clk_func; + devcb_resolved_write_line m_out_data_func; + + inline void set_signal(device_t *device, int signal, int state); + inline int get_signal(int signal); + + int m_line[SIGNAL_COUNT]; +}; + + +// ======================> econet_slot_device + +class econet_slot_device : public device_t, + public device_slot_interface +{ +public: + // construction/destruction + econet_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 + UINT8 m_address; + econet_device *m_econet; +}; + + +// ======================> device_econet_interface + +class device_econet_interface : public device_slot_card_interface +{ + friend class econet_device; + +public: + // construction/destruction + device_econet_interface(const machine_config &mconfig, device_t &device); + virtual ~device_econet_interface(); + + device_econet_interface *next() const { return m_next; } + device_econet_interface *m_next; + + // optional operation overrides + virtual void econet_clk(int state) = 0; + virtual void econet_data(int state) { }; + + econet_device *m_econet; + UINT8 m_address; +}; + + +// device type definition +extern const device_type ECONET; +extern const device_type ECONET_SLOT; + + + +#endif |