// license:BSD-3-Clause // copyright-holders:Curt Coder /********************************************************************** Commodore IEC Serial Bus emulation **********************************************************************/ #ifndef MAME_BUS_CBMIEC_CBMIEC_H #define MAME_BUS_CBMIEC_CBMIEC_H #pragma once //************************************************************************** // MACROS / CONSTANTS //************************************************************************** #define CBM_IEC_TAG "iec_bus" DECLARE_DEVICE_TYPE(CBM_IEC, cbm_iec_device) DECLARE_DEVICE_TYPE(CBM_IEC_SLOT, cbm_iec_slot_device) void cbm_iec_devices(device_slot_interface &device); //************************************************************************** // TYPE DEFINITIONS //************************************************************************** // ======================> cbm_iec_device class cbm_iec_slot_device; class device_cbm_iec_interface; class cbm_iec_device : public device_t { public: // construction/destruction cbm_iec_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock = XTAL()); auto srq_callback() { return m_write_srq.bind(); } auto atn_callback() { return m_write_atn.bind(); } auto clk_callback() { return m_write_clk.bind(); } auto data_callback() { return m_write_data.bind(); } auto reset_callback() { return m_write_reset.bind(); } void add_device(cbm_iec_slot_device *slot, device_t *target); // reads for both host and peripherals DECLARE_READ_LINE_MEMBER( srq_r ) { return get_signal(SRQ); } DECLARE_READ_LINE_MEMBER( atn_r ) { return get_signal(ATN); } DECLARE_READ_LINE_MEMBER( clk_r ) { return get_signal(CLK); } DECLARE_READ_LINE_MEMBER( data_r ) { return get_signal(DATA); } DECLARE_READ_LINE_MEMBER( reset_r ) { return get_signal(RESET); } // writes for host (driver_device) DECLARE_WRITE_LINE_MEMBER( host_srq_w ) { set_signal(this, SRQ, state); } DECLARE_WRITE_LINE_MEMBER( host_atn_w ) { set_signal(this, ATN, state); } DECLARE_WRITE_LINE_MEMBER( host_clk_w ) { set_signal(this, CLK, state); } DECLARE_WRITE_LINE_MEMBER( host_data_w ) { set_signal(this, DATA, state); } DECLARE_WRITE_LINE_MEMBER( host_reset_w ) { set_signal(this, RESET, state); } // writes for peripherals (device_t) void srq_w(device_t *device, int state) { set_signal(device, SRQ, state); } void atn_w(device_t *device, int state) { set_signal(device, ATN, state); } void clk_w(device_t *device, int state) { set_signal(device, CLK, state); } void data_w(device_t *device, int state) { set_signal(device, DATA, state); } void reset_w(device_t *device, int state) { set_signal(device, RESET, state); } protected: enum { SRQ = 0, ATN, CLK, DATA, RESET, SIGNAL_COUNT }; // device-level overrides virtual void device_start() override; virtual void device_reset() override; virtual void device_stop() override; 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_cbm_iec_interface * m_interface; // associated device's daisy interface int m_line[SIGNAL_COUNT]; }; simple_list m_device_list; private: devcb_write_line m_write_srq; devcb_write_line m_write_atn; devcb_write_line m_write_clk; devcb_write_line m_write_data; devcb_write_line m_write_reset; void set_signal(device_t *device, int signal, int state); int get_signal(int signal); int m_line[SIGNAL_COUNT]; }; // ======================> cbm_iec_slot_device class cbm_iec_slot_device : public device_t, public device_slot_interface { public: // construction/destruction template cbm_iec_slot_device(machine_config const &mconfig, char const *tag, device_t *owner, int address, T &&opts, char const *dflt) : cbm_iec_slot_device(mconfig, tag, owner) { option_reset(); opts(*this); set_default_option(dflt); set_fixed(false); set_address(address); } cbm_iec_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock = XTAL()); template static void add(machine_config &config, T &&_bus_tag, const char *_default_drive) { CBM_IEC_SLOT(config, "iec4", 4, cbm_iec_devices, nullptr); CBM_IEC_SLOT(config, "iec8", 8, cbm_iec_devices, _default_drive); CBM_IEC_SLOT(config, "iec9", 9, cbm_iec_devices, nullptr); CBM_IEC_SLOT(config, "iec10", 10, cbm_iec_devices, nullptr); CBM_IEC_SLOT(config, "iec11", 11, cbm_iec_devices, nullptr); CBM_IEC(config, std::forward(_bus_tag)); } void set_address(int address) { m_address = address; } int get_address() { return m_address; } // device-level overrides virtual void device_start() override; protected: int m_address; }; // ======================> device_cbm_iec_interface class device_cbm_iec_interface : public device_interface { friend class cbm_iec_device; public: // construction/destruction virtual ~device_cbm_iec_interface(); device_cbm_iec_interface *next() const { return m_next; } device_cbm_iec_interface *m_next; // optional operation overrides virtual void cbm_iec_srq(int state) { } virtual void cbm_iec_atn(int state) { } virtual void cbm_iec_clk(int state) { } virtual void cbm_iec_data(int state) { } virtual void cbm_iec_reset(int state) { } protected: device_cbm_iec_interface(const machine_config &mconfig, device_t &device); cbm_iec_device *m_bus; cbm_iec_slot_device *m_slot; }; #endif // MAME_BUS_CBMIEC_CBMIEC_H