diff options
Diffstat (limited to 'src/devices/bus/archimedes/podule/scsi_vti.cpp')
-rw-r--r-- | src/devices/bus/archimedes/podule/scsi_vti.cpp | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/src/devices/bus/archimedes/podule/scsi_vti.cpp b/src/devices/bus/archimedes/podule/scsi_vti.cpp new file mode 100644 index 00000000000..f0239dfeeb0 --- /dev/null +++ b/src/devices/bus/archimedes/podule/scsi_vti.cpp @@ -0,0 +1,173 @@ +// 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/ncr5390.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") |