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-rw-r--r--src/devices/bus/bbc/exp/exp.cpp183
1 files changed, 183 insertions, 0 deletions
diff --git a/src/devices/bus/bbc/exp/exp.cpp b/src/devices/bus/bbc/exp/exp.cpp
new file mode 100644
index 00000000000..d2a5cca3611
--- /dev/null
+++ b/src/devices/bus/bbc/exp/exp.cpp
@@ -0,0 +1,183 @@
+// license:BSD-3-Clause
+// copyright-holders:Nigel Barnes
+/**********************************************************************
+
+ BBC Master Compact Expansion slot emulation
+
+**********************************************************************/
+
+#include "emu.h"
+#include "exp.h"
+
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+DEFINE_DEVICE_TYPE(BBC_EXP_SLOT, bbc_exp_slot_device, "bbc_exp_slot", "BBC Master Compact Expansion port")
+
+
+
+//**************************************************************************
+// DEVICE BBC_EXP PORT INTERFACE
+//**************************************************************************
+
+//-------------------------------------------------
+// device_bbc_exp_interface - constructor
+//-------------------------------------------------
+
+device_bbc_exp_interface::device_bbc_exp_interface(const machine_config &mconfig, device_t &device)
+ : device_slot_card_interface(mconfig, device)
+{
+ m_slot = dynamic_cast<bbc_exp_slot_device *>(device.owner());
+}
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// bbc_exp_slot_device - constructor
+//-------------------------------------------------
+
+bbc_exp_slot_device::bbc_exp_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
+ device_t(mconfig, BBC_EXP_SLOT, tag, owner, clock),
+ device_slot_interface(mconfig, *this),
+ m_card(nullptr),
+ m_irq_handler(*this),
+ m_nmi_handler(*this),
+ m_cb1_handler(*this),
+ m_cb2_handler(*this)
+{
+}
+
+
+//-------------------------------------------------
+// device_validity_check -
+//-------------------------------------------------
+
+void bbc_exp_slot_device::device_validity_check(validity_checker &valid) const
+{
+ device_t *const carddev = get_card_device();
+ if (carddev && !dynamic_cast<device_bbc_exp_interface *>(carddev))
+ osd_printf_error("Card device %s (%s) does not implement device_bbc_exp_interface\n", carddev->tag(), carddev->name());
+}
+
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void bbc_exp_slot_device::device_start()
+{
+ device_t *const carddev = get_card_device();
+ m_card = dynamic_cast<device_bbc_exp_interface *>(carddev);
+ if (carddev && !m_card)
+ fatalerror("Card device %s (%s) does not implement device_bbc_exp_interface\n", carddev->tag(), carddev->name());
+
+ // resolve callbacks
+ m_irq_handler.resolve_safe();
+ m_nmi_handler.resolve_safe();
+
+ m_cb1_handler.resolve_safe();
+ m_cb2_handler.resolve_safe();
+}
+
+
+//-------------------------------------------------
+// device_reset - device-specific reset
+//-------------------------------------------------
+
+void bbc_exp_slot_device::device_reset()
+{
+}
+
+//-------------------------------------------------
+// read
+//-------------------------------------------------
+
+READ8_MEMBER(bbc_exp_slot_device::fred_r)
+{
+ if (m_card)
+ return m_card->fred_r(space, offset);
+ else
+ return 0xff;
+}
+
+READ8_MEMBER(bbc_exp_slot_device::jim_r)
+{
+ if (m_card)
+ return m_card->jim_r(space, offset);
+ else
+ return 0xff;
+}
+
+READ8_MEMBER(bbc_exp_slot_device::sheila_r)
+{
+ if (m_card)
+ return m_card->sheila_r(space, offset);
+ else
+ return 0xfe;
+}
+
+//-------------------------------------------------
+// write
+//-------------------------------------------------
+
+WRITE8_MEMBER(bbc_exp_slot_device::fred_w)
+{
+ if (m_card)
+ m_card->fred_w(space, offset, data);
+}
+
+WRITE8_MEMBER(bbc_exp_slot_device::jim_w)
+{
+ if (m_card)
+ m_card->jim_w(space, offset, data);
+}
+
+WRITE8_MEMBER(bbc_exp_slot_device::sheila_w)
+{
+ if (m_card)
+ m_card->sheila_w(space, offset, data);
+}
+
+//-------------------------------------------------
+// pb_r
+//-------------------------------------------------
+
+READ8_MEMBER(bbc_exp_slot_device::pb_r)
+{
+ if (m_card)
+ return 0x1f | m_card->pb_r(space, 0);
+ else
+ return 0xff;
+}
+
+
+//-------------------------------------------------
+// pb_w
+//-------------------------------------------------
+
+WRITE8_MEMBER(bbc_exp_slot_device::pb_w)
+{
+ if (m_card)
+ m_card->pb_w(space, 0, data);
+}
+
+//-------------------------------------------------
+// SLOT_INTERFACE( bbc_exp_devices )
+//-------------------------------------------------
+
+
+// slot devices
+//#include "autocue.h"
+#include "mertec.h"
+
+
+void bbc_exp_devices(device_slot_interface &device)
+{
+ //device.option_add("autocue", BBC_AUTOCUE); /* Autocue RAM disk board */
+ device.option_add("mertec", BBC_MERTEC); /* Mertec Compact Companion */
+}