MS-Dos/Microsoft-Disk
Operating System
Is the operating system for computers,
issued by Microsoft there is eight major
versions starting from
1981 that stopped development in 2000
and was gradually replaced
by different versions of Windows.
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History of development of
the system
Been developed MS DOS system based on a former 86-DOS and
accepted in the name of QDOS (Quick and Dirty Operating
System), QDOS system was developed by a company Seattle
Computer Products) and a company (Digital Research , Inc) is
the copyright owner of this program and has been put in a
number of devices the computer, such as primary personal or
Z80 CP / m, the IBM has entered the development of personal
computers which were company APPLE acquired it through a
device previously developed by Microstation and wanted IBM to
get a simple operating system compatible with the
requirements of personal computers, which it intends to
produce.
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The functionality of
MS - Dos
1-Begin the process of boot (run) computer and
a range of tests to make sure existential
computer equipment and the safety of
electrical wiring up the various units together.
2- Acceptance and implementation of operating
orders and orders the computer that is
entered through the keyboard, which is
responsible for controlling all parts of the
computer.
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The functionality of
MS - Dos
3- Conversion and transfer data and instructions
between main memory and floppy discs.
4- Enable the user to obtain additional copies of
the files and transferring them from floppy
disk to another or between the floppy disc and
hard drive.
5-Transfer instructions and data to the printer
Company Microsoft - one of the most software
before
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The functionality of
MS - Dos

Company Microsoft - one of the most software
companies for producing computer in the world the production of several versions of the operating
system MS-DOS, and despite the existence of
different versions but no significant differences
between them and can say that the various
versions of MS-DOS and one at the base of the
hand the potential of moving from version to
another and usually the new version did not abolish
the version before.
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Versions of MS Dos
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MS-DOS 1.0 version first and basic operating system and is
derived from the system 86-DOS.
MS-DOS 1.25( DS) Double Sides MS-DOS 1.25 and has
allowed to deal with the floppy disk with a two-sided (DS)
Double Sides
MS-DOS. MS-DOS 2.0 and the new improvements were added
to regulate the hard drive.
MS-DOS 3.0 ATTRIB MS-DOS 3.0 and enable the use of highdensity disks and added new commands such as his command
ATTRIB
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Versions of MS Dos
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MS-DOS 3.1 MS-DOS 3.1 and allowed to deal with local
networks
MS-DOS 3.2 MS-DOS 3.2 provided to deal with drive-sized
3.5-inch
MS-DOS 3.3 MS-DOS 3.3 provided to deal with drive-sized
3.5-inch high-density and added a new command
MS-DOS 4.0 DOS SHELL MEM MS-DOS 4.0 added the
possibility of dealing with DOS SHELL ordered MEM and
allowed to deal with a larger number of files
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version of MS-DOS 5.0 and
the fundamental changes

Was in version MS-DOS 5.0 enhancements to the program
DOS SHELL and the coordinated use new texts have also been
added many improvements to take advantage of memory and
deal with additional memory, and added a new command to
recover deleted files or restore disk to its previous state
before the restructuring, have also been added facilities in
dealing with the command line is to get help information
about any command or command storage and retrieval of
past or modified easily
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versions of MS-DOS 6.0 6.22

Been in the newer versions of MS Dos add
improvements to the previous version of MS-DOS 5.0
and has added a Microsoft many improvements to
take advantage of Aalmakrp and deal with additional
memory, and have added a new command such as
SCANDISK and is used to repair the hard drive crashes
and ordered DELTREE, which is used to clear the subindexes all content.
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operating system
components
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ROM BIOS: and it is the portion in the permanent memory RESIDENT ROM and
function to the supervision of the basic operations and the vital need computer and
this part works independently from the rest of the operating system in the sense
that its work by simply pressing the power key, and the rest of the DOS files not
found and must be downloaded before it becomes possible to work on the device,
and in fact that some of the ROM programs that you download the remaining part
to the memory RAM.
DISK RESIDENT : The section cylinder DISK RESIDENT: they constitute the
main part of the operating system and can be divided is also a two-tiered:
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:System Files) Part is loaded in the working memory RAM and permanently represented
by three files called system files (System Files) and this is a necessary part to start a
computer.
Part is loaded in the working memory RAM when you need it and not delete them as
soon as the deal with files, programs, and represent the orders of the "MS DOS
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::Design BY ::
ALI HANI ABU ALI
120090102
MAHMOD AL-SHRAFI
120090277
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