/*************************************************************************** a2bus.h - Apple II slot bus and card emulation by R. Belmont ***************************************************************************/ #pragma once #ifndef __A2BUS_H__ #define __A2BUS_H__ #include "emu.h" #define INH_SLOT_INVALID (255) //************************************************************************** // INTERFACE CONFIGURATION MACROS //************************************************************************** #define MCFG_A2BUS_BUS_ADD(_tag, _cputag, _config) \ MCFG_DEVICE_ADD(_tag, A2BUS, 0) \ MCFG_DEVICE_CONFIG(_config) \ a2bus_device::static_set_cputag(*device, _cputag); #define MCFG_A2BUS_SLOT_ADD(_nbtag, _tag, _slot_intf, _def_slot) \ MCFG_DEVICE_ADD(_tag, A2BUS_SLOT, 0) \ MCFG_DEVICE_SLOT_INTERFACE(_slot_intf, _def_slot, false) \ a2bus_slot_device::static_set_a2bus_slot(*device, _nbtag, _tag); #define MCFG_A2BUS_SLOT_REMOVE(_tag) \ MCFG_DEVICE_REMOVE(_tag) #define MCFG_A2BUS_ONBOARD_ADD(_nbtag, _tag, _dev_type, _def_inp) \ MCFG_DEVICE_ADD(_tag, _dev_type, 0) \ MCFG_DEVICE_INPUT_DEFAULTS(_def_inp) \ device_a2bus_card_interface::static_set_a2bus_tag(*device, _nbtag, _tag); #define MCFG_A2BUS_BUS_REMOVE(_tag) \ MCFG_DEVICE_REMOVE(_tag) //************************************************************************** // TYPE DEFINITIONS //************************************************************************** class a2bus_device; class a2bus_slot_device : public device_t, public device_slot_interface { public: // construction/destruction a2bus_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); a2bus_slot_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, const char *shortname, const char *source); // device-level overrides virtual void device_start(); // inline configuration static void static_set_a2bus_slot(device_t &device, const char *tag, const char *slottag); protected: // configuration const char *m_a2bus_tag, *m_a2bus_slottag; }; // device type definition extern const device_type A2BUS_SLOT; // ======================> a2bus_interface struct a2bus_interface { devcb_write_line m_out_irq_cb; devcb_write_line m_out_nmi_cb; devcb_write_line m_out_inh_cb; }; class device_a2bus_card_interface; // ======================> a2bus_device class a2bus_device : public device_t, public a2bus_interface { public: // construction/destruction a2bus_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); a2bus_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, const char *shortname, const char *source); // inline configuration static void static_set_cputag(device_t &device, const char *tag); void add_a2bus_card(int slot, device_a2bus_card_interface *card); device_a2bus_card_interface *get_a2bus_card(int slot); void set_irq_line(int state); void set_nmi_line(int state); void set_inh_slotnum(int slot); DECLARE_WRITE_LINE_MEMBER( irq_w ); DECLARE_WRITE_LINE_MEMBER( nmi_w ); protected: // device-level overrides virtual void device_start(); virtual void device_reset(); virtual void device_config_complete(); // internal state cpu_device *m_maincpu; devcb_resolved_write_line m_out_irq_func; devcb_resolved_write_line m_out_nmi_func; devcb_resolved_write_line m_out_inh_func; device_a2bus_card_interface *m_device_list[8]; const char *m_cputag; }; // device type definition extern const device_type A2BUS; // ======================> device_a2bus_card_interface // class representing interface-specific live a2bus card class device_a2bus_card_interface : public device_slot_card_interface { friend class a2bus_device; public: // construction/destruction device_a2bus_card_interface(const machine_config &mconfig, device_t &device); virtual ~device_a2bus_card_interface(); virtual UINT8 read_c0nx(address_space &space, UINT8 offset) { printf("a2bus: unhandled read at C0n%x\n", offset); return 0; } // C0nX - /DEVSEL virtual void write_c0nx(address_space &space, UINT8 offset, UINT8 data) { printf("a2bus: unhandled write %02x to C0n%x\n", data, offset); } virtual UINT8 read_cnxx(address_space &space, UINT8 offset) { return 0; } // CnXX - /IOSEL virtual void write_cnxx(address_space &space, UINT8 offset, UINT8 data) { printf("a2bus: unhandled write %02x to Cn%02x\n", data, offset); } virtual UINT8 read_c800(address_space &space, UINT16 offset) { return 0; } // C800 - /IOSTB virtual void write_c800(address_space &space, UINT16 offset, UINT8 data) { printf("a2bus: unhandled write %02x to %04x\n", data, offset + 0xc800); } virtual bool take_c800() { return true; } // override and return false if your card doesn't take over the c800 space virtual UINT8 read_inh_rom(address_space &space, UINT16 offset) { return 0; } virtual void write_inh_rom(address_space &space, UINT16 offset, UINT8 data) { } device_a2bus_card_interface *next() const { return m_next; } void set_a2bus_device(); UINT32 get_slotromspace() { return 0xc000 | (m_slot<<8); } // return Cn00 address for this slot UINT32 get_slotiospace() { return 0xc080 + (m_slot<<4); } // return C0n0 address for this slot void raise_slot_irq() { m_a2bus->set_irq_line(ASSERT_LINE); } void lower_slot_irq() { m_a2bus->set_irq_line(CLEAR_LINE); } void raise_slot_nmi() { m_a2bus->set_nmi_line(ASSERT_LINE); } void lower_slot_nmi() { m_a2bus->set_nmi_line(CLEAR_LINE); } void raise_slot_inh() { m_a2bus->set_inh_slotnum(m_slot); } void lower_slot_inh() { m_a2bus->set_inh_slotnum(INH_SLOT_INVALID); } // inline configuration static void static_set_a2bus_tag(device_t &device, const char *tag, const char *slottag); public: a2bus_device *m_a2bus; const char *m_a2bus_tag, *m_a2bus_slottag; int m_slot; device_a2bus_card_interface *m_next; }; #endif /* __A2BUS_H__ */