diff options
Diffstat (limited to 'src/devices/bus/archimedes/podule/scsi_ling.cpp')
-rw-r--r-- | src/devices/bus/archimedes/podule/scsi_ling.cpp | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/src/devices/bus/archimedes/podule/scsi_ling.cpp b/src/devices/bus/archimedes/podule/scsi_ling.cpp new file mode 100644 index 00000000000..0f9425f61e4 --- /dev/null +++ b/src/devices/bus/archimedes/podule/scsi_ling.cpp @@ -0,0 +1,149 @@ +// license:BSD-3-Clause +// copyright-holders:Nigel Barnes +/********************************************************************** + + Lingenuity SCSI Podule + + http://chrisacorns.computinghistory.org.uk/32bit_UpgradesH2Z/Lingenuity_SCSI.html + + TODO: + - everything, this is skeleton with ROM. + +**********************************************************************/ + +#include "emu.h" +#include "scsi_ling.h" +#include "machine/ncr5380.h" +#include "bus/nscsi/devices.h" + + +namespace { + +class arc_scsi_ling_device : + public device_t, + public device_archimedes_podule_interface +{ +public: + // construction/destruction + arc_scsi_ling_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock); + + static constexpr feature_type unemulated_features() { return feature::DISK; } + +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; + virtual void memc_map(address_map &map) override ATTR_COLD; + +private: + required_device<ncr5380_device> m_ncr5380; + required_memory_region m_podule_rom; + + u8 m_rom_page; +}; + + +void arc_scsi_ling_device::ioc_map(address_map &map) +{ + map(0x0000, 0x1fff).lr8(NAME([this](offs_t offset) { return m_podule_rom->base()[offset | ((m_rom_page << 11) & 0xf800)]; })).umask32(0x000000ff); + map(0x3800, 0x3800).lw8(NAME([this](u8 data) { m_rom_page = data; })); +} + +void arc_scsi_ling_device::memc_map(address_map &map) +{ + //map(0x2000, 0x20ff).m(m_ncr5380, FUNC(ncr5380_device::map)).umask32(0x000000ff); + map(0x2000, 0x20ff).lr8(NAME([this](offs_t offset) { logerror("r: offset %02x\n", offset >> 3); return m_ncr5380->read(offset >> 3); })).umask32(0x000000ff); + map(0x2000, 0x20ff).lw8(NAME([this](offs_t offset, u8 data) { logerror("w: offset %02x data %02x\n", offset >> 3, data); m_ncr5380->write(offset >> 3, data); })).umask32(0x000000ff); + map(0x2100, 0x2100).r(m_ncr5380, FUNC(ncr5380_device::dma_r)); + map(0x2100, 0x2100).w(m_ncr5380, FUNC(ncr5380_device::dma_w)); +} + + +//------------------------------------------------- +// ROM( scsi_ling ) +//------------------------------------------------- + +ROM_START( scsi_ling ) + ROM_REGION(0x10000, "podule_rom", 0) + ROM_LOAD("scsi_2.54.rom", 0x0000, 0x10000, CRC(32926220) SHA1(c05ea28f33afa98bd9d18bfe7dafee0a5fe7f2f4)) +ROM_END + +const tiny_rom_entry *arc_scsi_ling_device::device_rom_region() const +{ + return ROM_NAME( scsi_ling ); +} + + +//------------------------------------------------- +// device_add_mconfig - add device configuration +//------------------------------------------------- + +void arc_scsi_ling_device::device_add_mconfig(machine_config &config) +{ + NSCSI_BUS(config, "scsi"); + NSCSI_CONNECTOR(config, "scsi:0", default_scsi_devices, "harddisk", false); + NSCSI_CONNECTOR(config, "scsi:1", default_scsi_devices, nullptr, false); + NSCSI_CONNECTOR(config, "scsi:2", default_scsi_devices, nullptr, false); + NSCSI_CONNECTOR(config, "scsi:3", default_scsi_devices, nullptr, false); + NSCSI_CONNECTOR(config, "scsi:4", default_scsi_devices, nullptr, false); + NSCSI_CONNECTOR(config, "scsi:5", default_scsi_devices, nullptr, false); + NSCSI_CONNECTOR(config, "scsi:6", default_scsi_devices, nullptr, false); + NSCSI_CONNECTOR(config, "scsi:7").option_set("ncr5380", NCR5380) + .machine_config([this](device_t *device) + { + downcast<ncr5380_device &>(*device).irq_handler().set([this](int state) { set_pirq(state); }); + }); +} + + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +//------------------------------------------------- +// arc_scsi_ling_device - constructor +//------------------------------------------------- + +arc_scsi_ling_device::arc_scsi_ling_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) + : device_t(mconfig, ARC_SCSI_LING, tag, owner, clock) + , device_archimedes_podule_interface(mconfig, *this) + , m_ncr5380(*this, "scsi:7:ncr5380") + , m_podule_rom(*this, "podule_rom") + , m_rom_page(0) +{ +} + + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void arc_scsi_ling_device::device_start() +{ + save_item(NAME(m_rom_page)); +} + +//------------------------------------------------- +// device_reset - device-specific reset +//------------------------------------------------- + +void arc_scsi_ling_device::device_reset() +{ + m_rom_page = 0x00; +} + +} // anonymous namespace + + +//************************************************************************** +// DEVICE DEFINITIONS +//************************************************************************** + +DEFINE_DEVICE_TYPE_PRIVATE(ARC_SCSI_LING, device_archimedes_podule_interface, arc_scsi_ling_device, "arc_scsi_ling", "Lingenuity SCSI Podule") |