// license:BSD-3-Clause // copyright-holders:R. Belmont /*************************************************************************** a2bus.h - Apple II slot bus and card emulation by R. Belmont ***************************************************************************/ #pragma once #ifndef __A2BUS_H__ #define __A2BUS_H__ #include "emu.h" // /INH special addresses #define INH_START_INVALID 0xffff; #define INH_END_INVALID 0x0000; // /INH types #define INH_NONE 0x00 #define INH_READ 0x01 #define INH_WRITE 0x02 //************************************************************************** // INTERFACE CONFIGURATION MACROS //************************************************************************** #define MCFG_A2BUS_CPU(_cputag) \ a2bus_device::static_set_cputag(*device, _cputag); #define MCFG_A2BUS_OUT_IRQ_CB(_devcb) \ devcb = &a2bus_device::set_out_irq_callback(*device, DEVCB_##_devcb); #define MCFG_A2BUS_OUT_NMI_CB(_devcb) \ devcb = &a2bus_device::set_out_nmi_callback(*device, DEVCB_##_devcb); #define MCFG_A2BUS_OUT_INH_CB(_devcb) \ devcb = &a2bus_device::set_out_inh_callback(*device, DEVCB_##_devcb); #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); //************************************************************************** // 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, std::string tag, device_t *owner, UINT32 clock); a2bus_slot_device(const machine_config &mconfig, device_type type, const char *name, std::string tag, device_t *owner, UINT32 clock, const char *shortname, const char *source); // device-level overrides virtual void device_start() override; // inline configuration static void static_set_a2bus_slot(device_t &device, std::string tag, std::string slottag); protected: // configuration std::string m_a2bus_tag; std::string m_a2bus_slottag; }; // device type definition extern const device_type A2BUS_SLOT; class device_a2bus_card_interface; // ======================> a2bus_device class a2bus_device : public device_t { // multi-card devices need to access m_device_list, so they get friend'ed here. friend class a2bus_mcms2_device; public: // construction/destruction a2bus_device(const machine_config &mconfig, std::string tag, device_t *owner, UINT32 clock); a2bus_device(const machine_config &mconfig, device_type type, const char *name, std::string tag, device_t *owner, UINT32 clock, const char *shortname, const char *source); // inline configuration static void static_set_cputag(device_t &device, std::string tag); template static devcb_base &set_out_irq_callback(device_t &device, _Object object) { return downcast(device).m_out_irq_cb.set_callback(object); } template static devcb_base &set_out_nmi_callback(device_t &device, _Object object) { return downcast(device).m_out_nmi_cb.set_callback(object); } template static devcb_base &set_out_inh_callback(device_t &device, _Object object) { return downcast(device).m_out_inh_cb.set_callback(object); } void add_a2bus_card(int slot, device_a2bus_card_interface *card); device_a2bus_card_interface *get_a2bus_card(int slot); UINT8 get_a2bus_irq_mask(); UINT8 get_a2bus_nmi_mask(); void set_irq_line(int state, int slot); void set_nmi_line(int state, int slot); void set_maincpu_halt(int state); void recalc_inh(int slot); UINT8 dma_r(address_space &space, UINT16 offset); void dma_w(address_space &space, UINT16 offset, UINT8 data); UINT8 dma_nospace_r(UINT16 offset); void dma_nospace_w(UINT16 offset, UINT8 data); DECLARE_WRITE_LINE_MEMBER( irq_w ); DECLARE_WRITE_LINE_MEMBER( nmi_w ); protected: // device-level overrides virtual void device_start() override; virtual void device_reset() override; // internal state cpu_device *m_maincpu; address_space *m_maincpu_space; devcb_write_line m_out_irq_cb; devcb_write_line m_out_nmi_cb; devcb_write8 m_out_inh_cb; device_a2bus_card_interface *m_device_list[8]; std::string m_cputag; UINT8 m_slot_irq_mask; UINT8 m_slot_nmi_mask; }; // 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) { m_device.logerror("a2bus: unhandled read at C0n%x\n", offset); return 0; } // C0nX - /DEVSEL virtual void write_c0nx(address_space &space, UINT8 offset, UINT8 data) { m_device.logerror("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) { m_device.logerror("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) {m_device.logerror("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) { } virtual UINT16 inh_start() { return INH_START_INVALID; } virtual UINT16 inh_end() { return INH_END_INVALID; } virtual int inh_type() { return INH_NONE; } 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, m_slot); } void lower_slot_irq() { m_a2bus->set_irq_line(CLEAR_LINE, m_slot); } void raise_slot_nmi() { m_a2bus->set_nmi_line(ASSERT_LINE, m_slot); } void lower_slot_nmi() { m_a2bus->set_nmi_line(CLEAR_LINE, m_slot); } void recalc_slot_inh() { m_a2bus->recalc_inh(m_slot); } void set_maincpu_halt(int state) { m_a2bus->set_maincpu_halt(state); } // pass through the original address space if any for debugger protection // when debugging e.g. coprocessor cards (Z80 SoftCard etc). UINT8 slot_dma_read(address_space &space, UINT16 offset) { return m_a2bus->dma_r(space, offset); } void slot_dma_write(address_space &space, UINT16 offset, UINT8 data) { m_a2bus->dma_w(space, offset, data); } // these versions forego that protection for when the DMA isn't coming from a debuggable CPU device UINT8 slot_dma_read_no_space(UINT16 offset) { return m_a2bus->dma_nospace_r(offset); } void slot_dma_write_no_space(UINT16 offset, UINT8 data) { m_a2bus->dma_nospace_w(offset, data); } // inline configuration static void static_set_a2bus_tag(device_t &device, std::string tag, std::string slottag); public: a2bus_device *m_a2bus; std::string m_a2bus_tag; std::string m_a2bus_slottag; int m_slot; device_a2bus_card_interface *m_next; }; #endif /* __A2BUS_H__ */