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Diffstat (limited to 'src/devices/bus/archimedes/podule/ethera.cpp')
-rw-r--r-- | src/devices/bus/archimedes/podule/ethera.cpp | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/src/devices/bus/archimedes/podule/ethera.cpp b/src/devices/bus/archimedes/podule/ethera.cpp new file mode 100644 index 00000000000..a9f0d08d770 --- /dev/null +++ b/src/devices/bus/archimedes/podule/ethera.cpp @@ -0,0 +1,123 @@ +// license:BSD-3-Clause +// copyright-holders:Nigel Barnes +/********************************************************************** + + ANT Ethernet 10base2 mini-podule + + http://chrisacorns.computinghistory.org.uk/32bit_UpgradesA2G/ANT_Ethernet10base2Mini.html + + TODO: + - everything, this is skeleton with ROM. + +**********************************************************************/ + +#include "emu.h" +#include "ethera.h" + + +namespace { + +class arc_ethera_device : + public device_t, + public device_archimedes_podule_interface +{ +public: + // construction/destruction + arc_ethera_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_ethera_device::ioc_map(address_map &map) +{ + map(0x0000, 0x0fff).lr8(NAME([this](offs_t offset) { return m_podule_rom->base()[offset | ((m_rom_page << 10) & 0x3f800)]; })).umask32(0x000000ff); + map(0x0000, 0x0000).lw8(NAME([this](u8 data) { m_rom_page = data; })); +} + + +//------------------------------------------------- +// ROM( ethera ) +//------------------------------------------------- + +ROM_START( ethera ) + ROM_REGION(0x40000, "podule_rom", 0) + ROM_LOAD("ethernet5.rom", 0x0000, 0x40000, CRC(7bb0f699) SHA1(c6c9c9630b6777f4d49824b051fcd16fcb21b8f3)) +ROM_END + +const tiny_rom_entry *arc_ethera_device::device_rom_region() const +{ + return ROM_NAME( ethera ); +} + + +//------------------------------------------------- +// device_add_mconfig - add device configuration +//------------------------------------------------- + +void arc_ethera_device::device_add_mconfig(machine_config &config) +{ + //NQ8005(config, "edlc", 20_MHz_XTAL); +} + + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +//------------------------------------------------- +// arc_ethera_device - constructor +//------------------------------------------------- + +arc_ethera_device::arc_ethera_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) + : device_t(mconfig, ARC_ETHERA, 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_ethera_device::device_start() +{ + save_item(NAME(m_rom_page)); +} + +//------------------------------------------------- +// device_reset - device-specific reset +//------------------------------------------------- + +void arc_ethera_device::device_reset() +{ + m_rom_page = 0x00; +} + +} // anonymous namespace + + +//************************************************************************** +// DEVICE DEFINITIONS +//************************************************************************** + +DEFINE_DEVICE_TYPE_PRIVATE(ARC_ETHERA, device_archimedes_podule_interface, arc_ethera_device, "arc_ethera", "ANT Ethernet 10base2 mini-podule") |