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Diffstat (limited to 'src/devices/bus/spectrum/nemoide.cpp')
-rw-r--r-- | src/devices/bus/spectrum/nemoide.cpp | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/src/devices/bus/spectrum/nemoide.cpp b/src/devices/bus/spectrum/nemoide.cpp new file mode 100644 index 00000000000..75c83bc31fe --- /dev/null +++ b/src/devices/bus/spectrum/nemoide.cpp @@ -0,0 +1,85 @@ +// license:BSD-3-Clause +// copyright-holders:Andrei I. Holub + +#include "emu.h" +#include "nemoide.h" + +#include "bus/ata/ataintf.h" +#include "bus/ata/atapicdr.h" +#include "bus/ata/hdd.h" + +namespace bus::spectrum::zxbus { + +namespace { + +class nemoide_device : public device_t, public device_zxbus_card_interface +{ +public: + nemoide_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) + : device_t(mconfig, ZXBUS_NEMOIDE, tag, owner, clock) + , device_zxbus_card_interface(mconfig, *this) + , m_ata(*this, "ata") + { } + +protected: + virtual void device_add_mconfig(machine_config &config) override ATTR_COLD; + virtual void device_start() override ATTR_COLD; + +private: + void map_io(address_map &map) ATTR_COLD; + + u8 ata_r(offs_t offset); + void ata_w(offs_t offset, u8 data); + + required_device<ata_interface_device> m_ata; + + u8 m_ata_data_latch; +}; + +u8 nemoide_device::ata_r(offs_t offset) +{ + const u16 data = m_ata->cs0_r((offset >> 5) & 7); + if (!machine().side_effects_disabled()) + m_ata_data_latch = data >> 8; + + return data & 0xff; +} + +void nemoide_device::ata_w(offs_t offset, u8 data) +{ + const u16 ata_data = (m_ata_data_latch << 8) | data; + m_ata->cs0_w((offset >> 5) & 7, ata_data); +} + +void nemoide_device::map_io(address_map &map) +{ + map(0x0011, 0x0011).mirror(0xff00).lrw8(NAME([this]() { return m_ata_data_latch; }) + , NAME([this](offs_t offset, u8 data) { m_ata_data_latch = data; })); + map(0x0010, 0x0010).select(0xffe0).rw(FUNC(nemoide_device::ata_r), FUNC(nemoide_device::ata_w)); + map(0x00c8, 0x00c8).mirror(0xff00).lrw8(NAME([this]() { return m_ata->cs1_r(6); }) + , NAME([this](offs_t offset, u8 data) { m_ata->cs1_w(6, data); })); +} + +static void nemoide_ata_devices(device_slot_interface &device) +{ + device.option_add("hdd", IDE_HARDDISK); + device.option_add("cdrom", ATAPI_CDROM); +} + +void nemoide_device::device_add_mconfig(machine_config &config) +{ + ATA_INTERFACE(config, m_ata).options(nemoide_ata_devices, "hdd", "hdd", false); +} + +void nemoide_device::device_start() +{ + save_item(NAME(m_ata_data_latch)); + + m_zxbus->install_device(0x0000, 0xffff, *this, &nemoide_device::map_io); +} + +} // anonymous namespace + +} // namespace bus::spectrum::zxbus + +DEFINE_DEVICE_TYPE_PRIVATE(ZXBUS_NEMOIDE, device_zxbus_card_interface, bus::spectrum::zxbus::nemoide_device, "zxbus_nemoide", "Nemo IDE Controller") |