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-rw-r--r--src/devices/bus/astrocde/exp.c85
1 files changed, 85 insertions, 0 deletions
diff --git a/src/devices/bus/astrocde/exp.c b/src/devices/bus/astrocde/exp.c
new file mode 100644
index 00000000000..28017230f0d
--- /dev/null
+++ b/src/devices/bus/astrocde/exp.c
@@ -0,0 +1,85 @@
+// license:BSD-3-Clause
+// copyright-holders:Fabio Priuli
+/***********************************************************************************************************
+
+ Bally Astrocade Expansion port
+
+ ***********************************************************************************************************/
+
+
+#include "emu.h"
+#include "exp.h"
+
+//**************************************************************************
+// GLOBAL VARIABLES
+//**************************************************************************
+
+const device_type ASTROCADE_EXP_SLOT = &device_creator<astrocade_exp_device>;
+
+
+device_astrocade_card_interface::device_astrocade_card_interface(const machine_config &mconfig, device_t &device)
+ : device_slot_card_interface(mconfig, device)
+{
+}
+
+
+device_astrocade_card_interface::~device_astrocade_card_interface()
+{
+}
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// astrocade_exp_device - constructor
+//-------------------------------------------------
+astrocade_exp_device::astrocade_exp_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+ device_t(mconfig, ASTROCADE_EXP_SLOT, "Bally Astrocade expansion", tag, owner, clock, "astrocde_exp", __FILE__),
+ device_slot_interface(mconfig, *this),
+ m_card_mounted(false)
+{
+}
+
+
+//-------------------------------------------------
+// astrocade_exp_device - destructor
+//-------------------------------------------------
+
+astrocade_exp_device::~astrocade_exp_device()
+{
+}
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void astrocade_exp_device::device_start()
+{
+ m_card = dynamic_cast<device_astrocade_card_interface *>(get_card_device());
+ if (m_card)
+ m_card_mounted = true;
+}
+
+/*-------------------------------------------------
+ read
+ -------------------------------------------------*/
+
+READ8_MEMBER(astrocade_exp_device::read)
+{
+ if (m_card)
+ return m_card->read(space, offset);
+ else
+ return 0xff;
+}
+
+/*-------------------------------------------------
+ write
+ -------------------------------------------------*/
+
+WRITE8_MEMBER(astrocade_exp_device::write)
+{
+ if (m_card)
+ m_card->write(space, offset, data);
+}