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-rw-r--r--src/devices/bus/a2bus/a2bus.h197
1 files changed, 197 insertions, 0 deletions
diff --git a/src/devices/bus/a2bus/a2bus.h b/src/devices/bus/a2bus/a2bus.h
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+++ b/src/devices/bus/a2bus/a2bus.h
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+// 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, 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;
+
+
+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, 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);
+ template<class _Object> static devcb_base &set_out_irq_callback(device_t &device, _Object object) { return downcast<a2bus_device &>(device).m_out_irq_cb.set_callback(object); }
+ template<class _Object> static devcb_base &set_out_nmi_callback(device_t &device, _Object object) { return downcast<a2bus_device &>(device).m_out_nmi_cb.set_callback(object); }
+ template<class _Object> static devcb_base &set_out_inh_callback(device_t &device, _Object object) { return downcast<a2bus_device &>(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();
+ virtual void device_reset();
+
+ // 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];
+ const char *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) { logerror("a2bus: unhandled read at C0n%x\n", offset); return 0; } // C0nX - /DEVSEL
+ virtual void write_c0nx(address_space &space, UINT8 offset, UINT8 data) { 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) { 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) { 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, 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__ */