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Diffstat (limited to 'src/devices/bus/archimedes/podule/scsi_ling.cpp')
-rw-r--r--src/devices/bus/archimedes/podule/scsi_ling.cpp149
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
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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")