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Diffstat (limited to 'src/devices/bus/a2bus/a2bus.h')
-rw-r--r-- | src/devices/bus/a2bus/a2bus.h | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/src/devices/bus/a2bus/a2bus.h b/src/devices/bus/a2bus/a2bus.h new file mode 100644 index 00000000000..90ab602607d --- /dev/null +++ b/src/devices/bus/a2bus/a2bus.h @@ -0,0 +1,197 @@ +// 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__ */ |