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-rw-r--r--src/devices/bus/nasbus/nasbus.cpp165
1 files changed, 165 insertions, 0 deletions
diff --git a/src/devices/bus/nasbus/nasbus.cpp b/src/devices/bus/nasbus/nasbus.cpp
new file mode 100644
index 00000000000..739ef9decdf
--- /dev/null
+++ b/src/devices/bus/nasbus/nasbus.cpp
@@ -0,0 +1,165 @@
+// license:GPL-2.0+
+// copyright-holders:Dirk Best
+/***************************************************************************
+
+ Nascom NASBUS
+
+ 77-pin slot
+
+***************************************************************************/
+
+#include "nasbus.h"
+
+
+//**************************************************************************
+// NASBUS SLOT DEVICE
+//**************************************************************************
+
+const device_type NASBUS_SLOT = &device_creator<nasbus_slot_device>;
+
+//-------------------------------------------------
+// nasbus_slot_device - constructor
+//-------------------------------------------------
+
+nasbus_slot_device::nasbus_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+ device_t(mconfig, NASBUS_SLOT, "NASBUS Slot", tag, owner, clock, "nasbus_slot", __FILE__),
+ device_slot_interface(mconfig, *this),
+ m_nasbus_tag(NULL)
+{
+}
+
+nasbus_slot_device::nasbus_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_t(mconfig, type, name, tag, owner, clock, shortname, source),
+ device_slot_interface(mconfig, *this),
+ m_nasbus_tag(NULL)
+{
+}
+
+void nasbus_slot_device::set_nasbus_slot(device_t &device, device_t *owner, const char *nasbus_tag)
+{
+ nasbus_slot_device &nasbus_card = dynamic_cast<nasbus_slot_device &>(device);
+ nasbus_card.m_owner = owner;
+ nasbus_card.m_nasbus_tag = nasbus_tag;
+}
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void nasbus_slot_device::device_start()
+{
+ device_nasbus_card_interface *dev = dynamic_cast<device_nasbus_card_interface *>(get_card_device());
+
+ if (dev)
+ {
+ nasbus_device *m_nasbus = downcast<nasbus_device *>(m_owner->subdevice(m_nasbus_tag));
+ m_nasbus->add_card(dev);
+ }
+}
+
+
+//**************************************************************************
+// NASBUS DEVICE
+//**************************************************************************
+
+const device_type NASBUS = &device_creator<nasbus_device>;
+
+//-------------------------------------------------
+// nasbus_device - constructor
+//-------------------------------------------------
+
+nasbus_device::nasbus_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+ device_t(mconfig, NASBUS_SLOT, "NASBUS Backplane", tag, owner, clock, "nasbus", __FILE__),
+ m_program(NULL),
+ m_io(NULL),
+ m_ram_disable_handler(*this)
+{
+}
+
+//-------------------------------------------------
+// nasbus_device - destructor
+//-------------------------------------------------
+
+nasbus_device::~nasbus_device()
+{
+ m_dev.detach_all();
+}
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void nasbus_device::device_start()
+{
+ // resolve callbacks
+ m_ram_disable_handler.resolve_safe();
+}
+
+//-------------------------------------------------
+// device_reset - device-specific reset
+//-------------------------------------------------
+
+void nasbus_device::device_reset()
+{
+}
+
+//-------------------------------------------------
+// add_card - add new card to our bus
+//-------------------------------------------------
+
+void nasbus_device::add_card(device_nasbus_card_interface *card)
+{
+ card->set_nasbus_device(this);
+ m_dev.append(*card);
+}
+
+//-------------------------------------------------
+// set_program_space - set address space we are attached to
+//-------------------------------------------------
+
+void nasbus_device::set_program_space(address_space *program)
+{
+ m_program = program;
+}
+
+//-------------------------------------------------
+// set_io_space - set address space we are attached to
+//-------------------------------------------------
+
+void nasbus_device::set_io_space(address_space *io)
+{
+ m_io = io;
+}
+
+// callbacks from slot device to the host
+WRITE_LINE_MEMBER( nasbus_device::ram_disable_w ) { m_ram_disable_handler(state); }
+
+
+//**************************************************************************
+// CARTRIDGE INTERFACE
+//**************************************************************************
+
+//-------------------------------------------------
+// device_nasbus_card_interface - constructor
+//-------------------------------------------------
+
+device_nasbus_card_interface::device_nasbus_card_interface(const machine_config &mconfig, device_t &device) :
+ device_slot_card_interface(mconfig, device),
+ m_next(NULL),
+ m_nasbus(NULL)
+{
+}
+
+//-------------------------------------------------
+// ~device_nasbus_card_interface - destructor
+//-------------------------------------------------
+
+device_nasbus_card_interface::~device_nasbus_card_interface()
+{
+}
+
+void device_nasbus_card_interface::set_nasbus_device(nasbus_device *nasbus)
+{
+ m_nasbus = nasbus;
+}