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- этимология
protected mode - перевод на Английский
OPERATIONAL MODE OF X86-COMPATIBLE CENTRAL PROCESSING UNITS
Pmode; Protected Virtual Address Mode; Protected Mode; Protected virtual address mode; Protected-mode; 286 protected mode
.png?width=200 "An Intel 80386 microprocessor")
Найдено результатов: 719
protected mode
общая лексика
защищённый режим
в микропроцессорах Intel 80286 и старше - режим адресации, при которой процессор имеет доступ ко всей расширенной памяти. В защищённом режиме сегментный регистр содержит не адрес начала сегмента, а индекс в таблице описателей сегментов. Кроме адреса начала сегмента каждая запись в этой таблице содержит флаги защиты памяти, позволяющие запретить в неё запись и чтение. Отсюда возникло и название режима
антоним
Смотрите также
protected mode
защищенный режим
DOS Protected Mode Interface
API FOR MS-DOS ALLOWING PROGRAMS TO ACCESS PROTECTED MODE ON 386 (AND LATER) CPUS
DPMI Committee; DPMIXXX0; True DPMI; DPMI 0.9; DPMI 1.0; DOS API translation; DOS Protected Mode Interface 1.0; DOS Protected Mode Interface 0.9; DPMI client; DPMI server; DPMI host; Virtual DPMI host; Real DPMI host; DPMI kernel; DPMI 0.04; DOS Protected Mode Interface 0.04; DOS Protected Mode Interface Specification pre-release 0.04; MS-DOS Extensions for DPMI Hosts; DPMI DOS API; MS-DOS Extensions for DPMI Hosts Version Pre-Release 0.02; QDPMI$$$; MS-DOS extensions to the DPMI specification; DOS extensions to the DPMI specification; DPMI MS-DOS extensions; DPMI DOS extensions; MS-DOS extensions (DPMI); DOS extensions (DPMI); MS-DOS Extensions (DPMI); MSDPMI; DPMI.INI; Called interrupt 21 from protected mode; DPMI (DOS extender); Disk Operating System Protected Mode Interface
см. DPMI
offline mode
SETTING AVAILABLE ON MANY ELECTRONIC DEVICES
Flight Mode; Offline Mode; Flight mode; Airplane Mode; Plane mode; Aeroplane mode; Aeroplane Mode
общая лексика
автономный [режим]
режим работы периферийного устройства, при котором между ним и компьютером нет связи. Используется во время обслуживания, тестирования и конфигурирования
компьютер, не подсоединенный к локальной сети
offline mode
SETTING AVAILABLE ON MANY ELECTRONIC DEVICES
Flight Mode; Offline Mode; Flight mode; Airplane Mode; Plane mode; Aeroplane mode; Aeroplane Mode
автономный режим
conservancy
![Strict nature reserve [[Belianske Tatras]] in Slovakia](https://commons.wikimedia.org/wiki/Special:FilePath/Belianske Tatry.JPG?width=200 "Strict nature reserve [[Belianske Tatras]] in Slovakia")
![Prohibited activities and safety instructions at a state park in [[Oregon]]](https://commons.wikimedia.org/wiki/Special:FilePath/Safety instructions on Lone Ranch Beach.JPG?width=200 "Prohibited activities and safety instructions at a state park in [[Oregon]]")
![Tammela]], [[Tavastia Proper]], [[Finland]]](https://commons.wikimedia.org/wiki/Special:FilePath/Venesillanlahtea Kuivajärvellä Tammelassa.jpg?width=200 "Tammela]], [[Tavastia Proper]], [[Finland]]")
AREA WHICH RECEIVES PROTECTION BECAUSE OF ITS RECOGNIZED NATURAL, ECOLOGICAL, OR CULTURAL VALUES
Conservation area; Conservation Area; Protected areas; Conservation district; Soil and water conservation district; Conservation Areas; Wildlife area; Soil and Water Conservation District; Protected landscape; Soil conservation district; Natural resources district; Resource conservation district; Resources district; Conservation village; Protected landscape areas; Protected Landscape; Protected Area; Protected Seascape; Protected Areas; Protected seascape; Conservancy; Terrestrial protected area; Wildlife conservancy; Campaign for Nature; Protected land; Protected lands
сущ.
охрана природы; рациональное природопользование.
protected area
AREA WHICH RECEIVES PROTECTION BECAUSE OF ITS RECOGNIZED NATURAL, ECOLOGICAL, OR CULTURAL VALUES
Conservation area; Conservation Area; Protected areas; Conservation district; Soil and water conservation district; Conservation Areas; Wildlife area; Soil and Water Conservation District; Protected landscape; Soil conservation district; Natural resources district; Resource conservation district; Resources district; Conservation village; Protected landscape areas; Protected Landscape; Protected Area; Protected Seascape; Protected Areas; Protected seascape; Conservancy; Terrestrial protected area; Wildlife conservancy; Campaign for Nature; Protected land; Protected lands
защищенная зона
protected area
AREA WHICH RECEIVES PROTECTION BECAUSE OF ITS RECOGNIZED NATURAL, ECOLOGICAL, OR CULTURAL VALUES
Conservation area; Conservation Area; Protected areas; Conservation district; Soil and water conservation district; Conservation Areas; Wildlife area; Soil and Water Conservation District; Protected landscape; Soil conservation district; Natural resources district; Resource conservation district; Resources district; Conservation village; Protected landscape areas; Protected Landscape; Protected Area; Protected Seascape; Protected Areas; Protected seascape; Conservancy; Terrestrial protected area; Wildlife conservancy; Campaign for Nature; Protected land; Protected lands
общая лексика
защищённая область
область действия системы безопасности
строительное дело
защищённая (от пожара) зона, противопожарная зона
Смотрите также
wildlife area
AREA WHICH RECEIVES PROTECTION BECAUSE OF ITS RECOGNIZED NATURAL, ECOLOGICAL, OR CULTURAL VALUES
Conservation area; Conservation Area; Protected areas; Conservation district; Soil and water conservation district; Conservation Areas; Wildlife area; Soil and Water Conservation District; Protected landscape; Soil conservation district; Natural resources district; Resource conservation district; Resources district; Conservation village; Protected landscape areas; Protected Landscape; Protected Area; Protected Seascape; Protected Areas; Protected seascape; Conservancy; Terrestrial protected area; Wildlife conservancy; Campaign for Nature; Protected land; Protected lands
общая лексика
долгосрочный заказник дикой природы
conservancy
AREA WHICH RECEIVES PROTECTION BECAUSE OF ITS RECOGNIZED NATURAL, ECOLOGICAL, OR CULTURAL VALUES
Conservation area; Conservation Area; Protected areas; Conservation district; Soil and water conservation district; Conservation Areas; Wildlife area; Soil and Water Conservation District; Protected landscape; Soil conservation district; Natural resources district; Resource conservation district; Resources district; Conservation village; Protected landscape areas; Protected Landscape; Protected Area; Protected Seascape; Protected Areas; Protected seascape; Conservancy; Terrestrial protected area; Wildlife conservancy; Campaign for Nature; Protected land; Protected lands
conservancy noun 1) охрана рек и лесов; охрана природы 2) комитет по охране рек и лесов 3) attr. - conservancy area
Определение
protected mode
An operating mode of Intel 80x86 processors. The opposite
of real mode. The Intel 8088, Intel 8086, Intel 80188
and Intel 80186 had only real mode, processors beginning
with the Intel 80286 feature a second mode called protected
mode.
In real mode, addresses are generated by adding an address
offset to the value of a segment register shifted left four
bits. As the segment register and address offset are 16 bits
long this results in a 20-bit address. This is the origin of
the one megabyte (2^20) limit in real mode.
There are 4 segment registers on processors before the {Intel
80386}. The 80386 introduced two more segment registers.
Which segment register is used depends on the instruction, on
the addressing mode and of an optional instruction prefix
which selects the segment register explicitly.
In protected mode, the segment registers contain an index into
a table of segment descriptors. Each segment descriptor
contains the start address of the segment, to which the offset
is added to generate the address. In addition, the segment
descriptor contains memory protection information. This
includes an offset limit and bits for write and read
permission. This allows the processor to prevent memory
accesses to certain data. The operating system can use this
to protect different processes' memory from each other, hence
the name "protected mode".
While the standard register set belongs to the CPU, the
segment registers lie "at the boundary" between the CPU and
MMU. Each time a new value is loaded into a segment register
while in protected mode, the corresponding descriptor is
loaded into a descriptor cache in the (Segment-)MMU. On
processors before the Pentium this takes longer than just
loading the segment register in real mode. Addresses
generated by the CPU (which are segment offsets) are passed to
the MMU to be checked against the limit in the segment
descriptor and are there added to the segment base address in
the descriptor to form a linear address.
On a 80386 or later, the linear address is further processed
by the paged MMU before the result (the physical address)
appears on the chip's address pins. The 80286 doesn't have a
paged MMU so the linear address is output directly as the
physical address.
The paged MMU allows for arbitrary remapping of four klilobyte
memory blocks (pages) through a translation table stored in
memory. A few entries of this table are cached in the MMU's
Translation Lookaside Buffer to avoid excessive memory
accesses.
After processor reset, all processors start in real mode.
Protected mode has to be enabled by software. On the 80286
there exists no documented way back to real mode apart from
resetting the processor. Later processors allow switching
back to real mode by software.
Software which has been written or compiled to run in
protected mode must only use segment register values given to
it by the operating system. Unfortunately, most application
code for MS-DOS, written before the 286, will fail in
protected mode because it assumes real mode addressing and
writes arbitrary values to segment registers, e.g. in order to
perform address calculations.
Such use of segment registers is only really necessary with
data structures that are larger than 64 kilobytes and thus
don't fit into a single segment. This is usually dealt with
by the huge memory model in compilers. In this model,
compilers generate address arithmetic involving segment
registers. A solution which is portable to protected mode
with almost the same efficiency would involve using a table of
segments instead of calculating new segment register values ad
hoc.
To ease the transition to protected mode, Intel 80386 and
later processors provide "virtual 86 mode".
(1995-03-29)
Википедия
Protected mode
In computing, protected mode, also called protected virtual address mode, is an operational mode of x86-compatible central processing units (CPUs). It allows system software to use features such as virtual memory, paging and safe multi-tasking designed to increase an operating system's control over application software.
When a processor that supports x86 protected mode is powered on, it begins executing instructions in real mode, in order to maintain backward compatibility with earlier x86 processors. Protected mode may only be entered after the system software sets up one descriptor table and enables the Protection Enable (PE) bit in the control register 0 (CR0).
Protected mode was first added to the x86 architecture in 1982, with the release of Intel's 80286 (286) processor, and later extended with the release of the 80386 (386) in 1985. Due to the enhancements added by protected mode, it has become widely adopted and has become the foundation for all subsequent enhancements to the x86 architecture, although many of those enhancements, such as added instructions and new registers, also brought benefits to the real mode.
