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-rw-r--r--src/mess/machine/a2bus.h166
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diff --git a/src/mess/machine/a2bus.h b/src/mess/machine/a2bus.h
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+/***************************************************************************
+
+ 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, _def_inp) \
+ MCFG_DEVICE_ADD(_tag, A2BUS_SLOT, 0) \
+ MCFG_DEVICE_SLOT_INTERFACE(_slot_intf, _def_slot, _def_inp, 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);
+
+ // 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);
+ // 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
+ device_t *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__ */