Mathematics for computing

1.  Number System
2.  Data Representation
3.  Boolean Algebra
4. Logic Gates And Circuits

CMD Examples

C:\Document and settings\vai279>cd.. Exit from vai279

C:\Document and settings\>cd.. Exit from vai279

C:\>f: Create New folder (Micheal)

F:\>cd Micheal Go to Micheal

F:\Micheal>cd.. Exit from Micheal

F:\> rd Micheal Delete Micheal

F:\> md Jackson Create New folder (Jackson)

CMD

ASSOC	Displays or modifies extension assocications
ATTRIB	Displays or changes file attributes
CACLS	Displays or modifies access contol list ACLS files
CD	Displays name of or chnges current directory
CHCP	Displays or set the active code page number
CHDIR	Displays or modifies the cheking of disk at boot time
CHKNTFS	Displays or Altres the comprison of files on NTFS partions
DATE	Displays or set the date
DIR	Displays a list of file old subdirectories in a directory
ECHO	Displays maseges, or turn command ochoins on or off
FTYPE	Displays or file type used in file extenson associations
MORE	Displays out put one screen at a time
PATH	Displays or set a search  path for exectable file
SET	Displays, set or removie windows enviroment  varibles
TIME	Displays or set the system time
VOL	Displays a disk volume lable and serial number

DOSE

• Dose is a disk operating system. Dose cheater user interface.

• You can open the dose in windows XP Bellow-

    Start- Programs files- Accessories- Command Prompt
                   or
    Stard- Run- CMD-ok

BIOS

• Although every personal computer user the same essential sub-assemblies; Each submissively is designed a bit differently.Variations in hardware make it difficult to use a single stranded operating system in stead of tailoring an operating system and applications to specifies computers. A basic input output system (BIOS) is added on ROM IC's provided an interface between the raw PC hardware and the standardized operating system BIOS gives an OS access to a stranded set of function. 

• The firmware in ROM contains programs witch initialize various LSI chips for performing input output operations. These routines can be accessed by any operating system or utilities when ever an I/O operation has to be performed. This relives the OS and utility program from the complex takes of dealing with the input/output controllers.

EPROM

This is a memory chip whose contenst are normaly fixed. However the chip may have its contens erased by the action of ultra violet light and may then be programmed.

Disk Cach

Disk cache is a pation of a computer's RAM set aside for temporarily holding information read from disk. It holds information that either has recently been requested from disk or has precariously been written to disk.