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-rw-r--r--src/devices/bus/archimedes/podule/ether3.cpp122
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diff --git a/src/devices/bus/archimedes/podule/ether3.cpp b/src/devices/bus/archimedes/podule/ether3.cpp
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+++ b/src/devices/bus/archimedes/podule/ether3.cpp
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+// license:BSD-3-Clause
+// copyright-holders:Nigel Barnes
+/**********************************************************************
+
+ Acorn AEH54 10Base2 Ethernet Podule
+
+ http://chrisacorns.computinghistory.org.uk/32bit_UpgradesA2G/Acorn_AEH54_Ethernet.html
+
+ TODO:
+ - everything, this is skeleton with ROM.
+
+**********************************************************************/
+
+#include "emu.h"
+#include "ether3.h"
+
+
+namespace {
+
+class arc_ether3_aeh54_device :
+ public device_t,
+ public device_archimedes_podule_interface
+{
+public:
+ // construction/destruction
+ arc_ether3_aeh54_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock);
+
+ static constexpr feature_type unemulated_features() { return feature::COMMS; }
+
+protected:
+ // device-level overrides
+ virtual void device_start() override ATTR_COLD;
+ virtual void device_reset() override ATTR_COLD;
+
+ // optional information overrides
+ virtual void device_add_mconfig(machine_config &config) override ATTR_COLD;
+ virtual const tiny_rom_entry *device_rom_region() const override ATTR_COLD;
+
+ // device_archimedes_podule_interface overrides
+ virtual void ioc_map(address_map &map) override ATTR_COLD;
+
+private:
+ required_memory_region m_podule_rom;
+
+ u8 m_rom_page;
+};
+
+
+void arc_ether3_aeh54_device::ioc_map(address_map &map)
+{
+ map(0x0000, 0x3fff).lr8(NAME([this](offs_t offset) { return m_podule_rom->base()[offset | ((m_rom_page << 12) & 0x1f000)]; })).umask32(0x000000ff);
+ map(0x0000, 0x0000).lw8(NAME([this](u8 data) { m_rom_page = data; }));
+}
+
+
+//-------------------------------------------------
+// ROM( ether3_aeh54 )
+//-------------------------------------------------
+
+ROM_START( ether3_aeh54 )
+ ROM_REGION(0x20000, "podule_rom", 0)
+ ROM_LOAD("aun_client_rom.rom", 0x0000, 0x20000, CRC(8137b9eb) SHA1(103318a527ea5f9a3fe373bfb8f8d0ad3697617f))
+ROM_END
+
+const tiny_rom_entry *arc_ether3_aeh54_device::device_rom_region() const
+{
+ return ROM_NAME( ether3_aeh54 );
+}
+
+
+//-------------------------------------------------
+// device_add_mconfig - add device configuration
+//-------------------------------------------------
+
+void arc_ether3_aeh54_device::device_add_mconfig(machine_config &config)
+{
+}
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// arc_ether3_aeh54_device - constructor
+//-------------------------------------------------
+
+arc_ether3_aeh54_device::arc_ether3_aeh54_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
+ : device_t(mconfig, ARC_ETHER3_AEH54, tag, owner, clock)
+ , device_archimedes_podule_interface(mconfig, *this)
+ , m_podule_rom(*this, "podule_rom")
+ , m_rom_page(0)
+{
+}
+
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void arc_ether3_aeh54_device::device_start()
+{
+ save_item(NAME(m_rom_page));
+}
+
+//-------------------------------------------------
+// device_reset - device-specific reset
+//-------------------------------------------------
+
+void arc_ether3_aeh54_device::device_reset()
+{
+ m_rom_page = 0x00;
+}
+
+} // anonymous namespace
+
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+DEFINE_DEVICE_TYPE_PRIVATE(ARC_ETHER3_AEH54, device_archimedes_podule_interface, arc_ether3_aeh54_device, "arc_ether3_aeh54", "Acorn AEH54 10Base2 Ethernet Podule")