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Diffstat (limited to 'src/devices/bus/archimedes/podule/scsi_vti.cpp')
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diff --git a/src/devices/bus/archimedes/podule/scsi_vti.cpp b/src/devices/bus/archimedes/podule/scsi_vti.cpp
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+++ b/src/devices/bus/archimedes/podule/scsi_vti.cpp
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+// license:BSD-3-Clause
+// copyright-holders:Nigel Barnes
+/**********************************************************************
+
+ VTI User Port and SCSI Podule
+
+ http://chrisacorns.computinghistory.org.uk/32bit_UpgradesH2Z/VTI_userportSCSI.html
+
+ TODO:
+ - map the EEPROM
+ - fix User Port module
+
+**********************************************************************/
+
+#include "emu.h"
+#include "scsi_vti.h"
+#include "machine/6522via.h"
+#include "machine/eepromser.h"
+#include "machine/ncr53c90.h"
+#include "bus/bbc/userport/userport.h"
+#include "bus/nscsi/devices.h"
+
+
+namespace {
+
+class arc_scsi_vti_device :
+ public device_t,
+ public device_archimedes_podule_interface
+{
+public:
+ // construction/destruction
+ arc_scsi_vti_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock);
+
+ static constexpr feature_type imperfect_features() { return feature::DISK; }
+
+protected:
+ // device-level overrides
+ virtual void device_start() override;
+ virtual void device_reset() override;
+
+ // optional information overrides
+ virtual void device_add_mconfig(machine_config &config) override;
+ virtual const tiny_rom_entry *device_rom_region() const override;
+
+ // device_archimedes_podule_interface overrides
+ virtual void ioc_map(address_map &map) override;
+ virtual void memc_map(address_map &map) override;
+
+private:
+ required_device<ncr53c94_device> m_fas216;
+ required_device<eeprom_serial_93cxx_device> m_eeprom;
+ required_memory_region m_podule_rom;
+
+ u8 m_rom_page;
+ u8 m_drq_status;
+};
+
+
+void arc_scsi_vti_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(0x3d00, 0x3d3f).rw("via", FUNC(via6522_device::read), FUNC(via6522_device::write)).umask32(0x000000ff);
+}
+
+void arc_scsi_vti_device::memc_map(address_map &map)
+{
+ map(0x2000, 0x21ff).lr8(NAME([this](offs_t offset) { return m_fas216->read(offset >> 3); })).umask32(0x000000ff);
+ map(0x2000, 0x21ff).lw8(NAME([this](offs_t offset, u8 data) { m_fas216->write(offset >> 3, data); })).umask32(0x000000ff);
+ map(0x2200, 0x2203).rw(m_fas216, FUNC(ncr53c94_device::dma16_r), FUNC(ncr53c94_device::dma16_w)).umask32(0x0000ffff);
+ map(0x2600, 0x2600).lr8(NAME([this]() { return m_drq_status; }));
+}
+
+
+//-------------------------------------------------
+// ROM( scsi_vti )
+//-------------------------------------------------
+
+ROM_START( scsi_vti )
+ ROM_REGION(0x10000, "podule_rom", 0)
+ ROM_LOAD("vti_up_powerrom.bin", 0x0000, 0x10000, CRC(7ec5854c) SHA1(eb20b1369964cfaee156ba1fc3636997407cc7ba))
+ROM_END
+
+const tiny_rom_entry *arc_scsi_vti_device::device_rom_region() const
+{
+ return ROM_NAME( scsi_vti );
+}
+
+
+//-------------------------------------------------
+// device_add_mconfig - add device configuration
+//-------------------------------------------------
+
+void arc_scsi_vti_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("fas216", NCR53CF94).clock(24.576_MHz_XTAL) // FAS216
+ .machine_config([this](device_t *device)
+ {
+ ncr53c94_device &fas216(downcast<ncr53c94_device &>(*device));
+ fas216.set_busmd(ncr53c94_device::busmd_t::BUSMD_1);
+ fas216.irq_handler_cb().set([this](int state) { set_pirq(state); });
+ fas216.drq_handler_cb().set([this](int state) { m_drq_status = state; });
+ });
+
+ EEPROM_93C06_16BIT(config, m_eeprom); // 2600 b0
+
+ via6522_device &via(MOS6522(config, "via", DERIVED_CLOCK(1, 4)));
+ via.irq_handler().set([this](int state) { set_pirq(state); });
+ via.writepa_handler().set([this](u8 data) { m_rom_page = data; });
+ via.readpb_handler().set("userport", FUNC(bbc_userport_slot_device::pb_r));
+ via.writepb_handler().set("userport", FUNC(bbc_userport_slot_device::pb_w));
+ via.cb1_handler().set("userport", FUNC(bbc_userport_slot_device::write_cb1));
+ via.cb2_handler().set("userport", FUNC(bbc_userport_slot_device::write_cb2));
+
+ bbc_userport_slot_device &userport(BBC_USERPORT_SLOT(config, "userport", bbc_userport_devices, nullptr));
+ userport.cb1_handler().set("via", FUNC(via6522_device::write_cb1));
+ userport.cb2_handler().set("via", FUNC(via6522_device::write_cb2));
+}
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// arc_scsi_vti_device - constructor
+//-------------------------------------------------
+
+arc_scsi_vti_device::arc_scsi_vti_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
+ : device_t(mconfig, ARC_SCSI_VTI, tag, owner, clock)
+ , device_archimedes_podule_interface(mconfig, *this)
+ , m_fas216(*this, "scsi:7:fas216")
+ , m_eeprom(*this, "eeprom")
+ , m_podule_rom(*this, "podule_rom")
+ , m_rom_page(0)
+ , m_drq_status(0)
+{
+}
+
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void arc_scsi_vti_device::device_start()
+{
+ save_item(NAME(m_rom_page));
+}
+
+//-------------------------------------------------
+// device_reset - device-specific reset
+//-------------------------------------------------
+
+void arc_scsi_vti_device::device_reset()
+{
+ m_rom_page = 0x00;
+}
+
+} // anonymous namespace
+
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+DEFINE_DEVICE_TYPE_PRIVATE(ARC_SCSI_VTI, device_archimedes_podule_interface, arc_scsi_vti_device, "arc_scsi_vti", "VTI User Port and SCSI Podule")