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Shaadi.com Matrimonials
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DOS: Disk Operating System - Page 1
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BUFFERS
It allows you to set the number of buffer that MS DOS allocates in memory
at a time we start the system.
SYNTAX : buffers = n(,m)(/x)
Where “n” is the number of buffers from 1 to 99. If (/x) I specified the
maximum number of disk buffers are 10,000 or the largest number of
buffers that can fit in memory, which even is less. “m” is the maximum
number of sectors that are read or write data in one input or output
operation by default it is one. A disk buffer is a block of memory that
MS DOS uses to whole data when reading or writing for a application such
as word processor, number between 10 and 20 provided the best
performance. If you want to create 20 buffers then write the CONFIG.SYS
file as buffer = 20
FILE COMMAND
Sets of maximum allowed number of currently open files. By default it is 8
maximum numbers is 255. If you exceed the maximum number of open files
during processing. MS DOS displays the message “Too Many Files Opened”.
For example.
FILES : 25 indicated that maximum of 25 files can be opened at once.
COUNTRY COMMAND
Country allows MS DOS to use the international time, date, currency,
case conversion and decimal separators.
SYNTAX : country xxx [,{yyy}{;(drive) filename}]
Where “xxx” is a country code, “yyy” is the code page for the country
file name is a file name containing country information. By default
United States settings are assumed. If you don’t specify, filename
command identifies to MS DOS which country character set. The following
table list each country supported by MS DOS the tables also lists the
code Pages that may use a specific country code. |
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Country |
Country Code |
Page Code |
| US |
001 |
437,850 |
| French |
002 |
863,850 |
| America
|
003 |
437,850 |
| Netherlands |
031 |
437,850 |
| Belgium |
032 |
437,850 |
DEVICE COMMAND
It installs device drivers.
SYNTAX : Device = drive/path/file
Many peripherals device and some application required that a special
controlling software program called a device driver be loaded in
memory for example like ANSI.SYS, DISPLAY.SYS, RAMDRIVER.SYS –
initializes a ram disk by conversion, many device drivers has file
extension .SYS, .DOS include a number of device driver for example
device = ANSI.SYS. It loads the extended keyboard and screen driver.
Some peripheral device drivers are contained in executable file and
that may be invoked from the DOS prompt.
SHELL COMMAND
It installs an alternate command.com file and changes the
environment size.
SYNTAX : Shell [drive/path] command.com [/switch]
DOS looks for command.com in the root directory to the drive use to
load the operation system use the shell command to indicate the
different location for command.com for example you might put
command.com on ram disk to increase performance speed and reduce
disk changes on system .For example: Shell =d:\>command.com.It load
the copy
Of command.com on “D” drive.
LAST DRIVE
It specifies the largest logical drive letter to be
used by the system
SYNTAX : Last drive – drive where drive parameter is a letter from A
to Z color are not used in this syntax. For example last drive = “H”
if set the maximum of 8 logical drive letters.
INSTALL COMMAND
It loads, terminates – and – stay – resident
software (TSR).
SYNTAX : Install = [drive/path] file exe TSR programs are normally
loaded by mean of
Executable file at the DOS prompt. The install command let you load
TSR program at the earliest point in the power on process. The file
extension .Com or .Exe is required for DOS external command may be
loaded in this way are FASTOPEN.EXE, SHARE.EXE it installs the share
command from the file located on the c:\DOS sub directory.
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INTERNAL COMMAND
Internal commands are in built of MS DOS that is the
meaning of these commands is in the command interpreter file COMMAND.COM
To use them, no extra file is required.
EXTERNAL COMMAND
External commands are separate files residing on the disk and when
executed behave like commands extension of these commands files is
either “.Com” or “.Exe” or “.Bat”. The MS DOS users create the bat
files.
TOO MANY REDIRECTIONS
You have redirect data output to a device that doesn’t exist or have
attempted to redirected data that has already redirected.
TOO MANY OPEN FILES You have
exceeded the maximum number of allocated open files in your system;
increase the maximum with the file command.
SPECIFIED DRIVE DOES NOT EXIST ON IS NON
REMOVABLE
You have invoked a command intended for use on floppy
drives referencing a hard disk drive letter doesn’t exist.
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