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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/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, const XTAL &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, const XTAL &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")
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