diff options
Diffstat (limited to 'src/devices/bus/archimedes/podule/ether3.cpp')
-rw-r--r-- | src/devices/bus/archimedes/podule/ether3.cpp | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/src/devices/bus/archimedes/podule/ether3.cpp b/src/devices/bus/archimedes/podule/ether3.cpp new file mode 100644 index 00000000000..74f1e368769 --- /dev/null +++ b/src/devices/bus/archimedes/podule/ether3.cpp @@ -0,0 +1,122 @@ +// 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") |