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Diffstat (limited to 'src/devices/bus/acorn/system/econet.cpp')
-rw-r--r--src/devices/bus/acorn/system/econet.cpp88
1 files changed, 88 insertions, 0 deletions
diff --git a/src/devices/bus/acorn/system/econet.cpp b/src/devices/bus/acorn/system/econet.cpp
new file mode 100644
index 00000000000..01b4c6010be
--- /dev/null
+++ b/src/devices/bus/acorn/system/econet.cpp
@@ -0,0 +1,88 @@
+// license:BSD-3-Clause
+// copyright-holders:Nigel Barnes
+/**********************************************************************
+
+ Acorn Econet Interface
+
+ Part No. 200,024
+
+ http://chrisacorns.computinghistory.org.uk/8bit_Upgrades/Acorn_Econet.html
+
+**********************************************************************/
+
+#include "emu.h"
+#include "econet.h"
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+DEFINE_DEVICE_TYPE(ACORN_ECONET, acorn_econet_device, "acorn_econet", "Acorn Econet Interface")
+
+//-------------------------------------------------
+// device_add_mconfig - add device configuration
+//-------------------------------------------------
+
+MACHINE_CONFIG_START(acorn_econet_device::device_add_mconfig)
+ /* econet */
+ MCFG_DEVICE_ADD(m_adlc, MC6854, 0)
+ MCFG_MC6854_OUT_TXD_CB(WRITELINE(m_econet, econet_device, host_data_w))
+ MCFG_MC6854_OUT_IRQ_CB(WRITELINE(*this, acorn_econet_device, bus_irq_w))
+
+ ECONET(config, m_econet, 0);
+ m_econet->clk_wr_callback().set(m_adlc, FUNC(mc6854_device::txc_w));
+ m_econet->clk_wr_callback().append(m_adlc, FUNC(mc6854_device::rxc_w));
+ m_econet->data_wr_callback().set(m_adlc, FUNC(mc6854_device::set_rx));
+ MCFG_ECONET_SLOT_ADD("econet254", 254, econet_devices, nullptr)
+MACHINE_CONFIG_END
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// acorn_econet_device - constructor
+//-------------------------------------------------
+
+acorn_econet_device::acorn_econet_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
+ : device_t(mconfig, ACORN_ECONET, tag, owner, clock)
+ , device_acorn_bus_interface(mconfig, *this)
+ , m_adlc(*this, "mc6854")
+ , m_econet(*this, "econet")
+{
+}
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void acorn_econet_device::device_start()
+{
+}
+
+//-------------------------------------------------
+// device_reset - device-specific reset
+//-------------------------------------------------
+
+void acorn_econet_device::device_reset()
+{
+ set_acorn_bus_device();
+ address_space &space = m_bus->memspace();
+
+ space.install_readwrite_handler(0x1940, 0x1943, read8_delegate(FUNC(mc6854_device::read), m_adlc.target()), write8_delegate(FUNC(mc6854_device::write), m_adlc.target()));
+ space.install_read_handler(0x1944, 0x1944, read8_delegate(FUNC(acorn_econet_device::statid_r), this));
+}
+
+//**************************************************************************
+// IMPLEMENTATION
+//**************************************************************************
+
+READ8_MEMBER(acorn_econet_device::statid_r)
+{
+ return 0xfe;
+}
+
+WRITE_LINE_MEMBER(acorn_econet_device::bus_irq_w)
+{
+ m_bus->irq_w(state);
+}