Micro Op SYS (DOS)

1
Micro Op SYS (DOS)

• Chapters 1, 2, 3, 5, 6, 7

2
Hardware

• Four Categories
• CPU (Central Processing Unit)
• Primary Storage (RAM)
• Input/Output Devices
• Keyboard
• Mouse
• Monitor
• Printer
• Secondary Storage (Drives)

3
SOFTWARE

• Two Categories
• System Software
• Operating Systems
• DOS, Win3.x, Win9x, WinNT, Win2000, WinXp,
  Win2003, Unix, Linux, MAC, OS2, Longhorn
• Utility Support Programs
• Norton, Macafe, etc.

4
SOFTWARE (cont)

• Application Software
• Eight Categories
• Word Processing
• Spreadsheet
• Database Management
• Communications
• Mathematical Molding
• Graphics
• Games
• Software Development Tools

5
Drive Layout

• Fragmentation
• Master Boot Record (MBR)
• File Allocation Table (FAT)
• Root Directory
• Directory
• Sub-Directory

6
(No Transcript)
7
DOS

• File Naming Convention
• D\Test\filename.ext
• drive path filename extension
• Filename ? Max of 8 characters
• Extension ? Max of 3 characters
• Example
• A\test\dos\project.doc

8
Extensions

• Executable files
• BAT batch file
• COM program file lt64KB
• EXE program file gt64KB
• Text files
• BAK Backup text file
• BAS BASIC file
• DAT Data File
• DBF dBase file
• DOC Documentation file
• HLP Help file
• INI Initialization file
• PRN Printer file
• SYS System ASCII file
• TXT Text file

• Other files
• DEF Program setup file
• FON Font file
• GIF Graphics image file
• OVL Overlay file
• PIF Program information file
• SYS System binary file
• TIF TIFF graphic image file
• WKI Lotus 1-2-3 worksheet file
• WPG WordPerfect graphic file
• XLS Excel file

9
Wildcards

• Two types
• Asterisk ()
• Representing a group of one or more characters
• Question Mark (?)
• Representing only a single character
• Used a lot with the DIR command for narrower
  searching

10
DOS Commands

• Internal
• Frequently used and/or relatively small DOS
  commands loaded into RAM when the system is
  booted
• External
• Reside on the DOS disk
• Must be copied into RAM each time they are
  executed

11
Some DOS Commands

• DATE
• TIME
• HELP
• Help DATE
• Date /?
• Format
• Switches
• /S make bootable
• /V add a volume label
• /Q quick format
• /F floppy disk size
• /U - unconditional

12
Internal DOS Commands

• Frequently used and/or relatively small DOS
  commands loaded into RAM when the system is booted

13
DOS Commands

• CLS
• REN
• VER

14
DOS Commands (cont)

• COPY
• copy filename.ext afilename.ext
• Can use wildcards
• Copy . a.
• DEL
• del filename.ext
• Can use wildcards
• del .

15
DOS Commands (cont)

• TYPE
• Allows you to view the contains inside of a file
  without having to open another program

16
External DOS Commands

• Reside on the DOS disk
• Must be copied into RAM each time they are
  executed

17
DOS Commands

• LABEL
• CHKDSK (after DOS6.2 SCANDISK)
• DISKCOPY
• Must be the same size
• UNDELETE

18
DOS Commands (cont)

• ATTRIB
• attrib A H R S afilename.ext
• attrib a.
• XCOPY
• Similar to COPY but allows you to include
  subdirectories
• /s must be used to copy subdirectories

19
DOS Disk Commands

• CD or CHDIR
• MD or MKDIR
• RD or RMDIR

20
DOS Disk Commands (cont)

• TREE
• DELTREE
• PROMPT

21
DOS Disk Commands (cont)

• MOVE
• PROMPT
• t system time
• d system date
• n default drive
• g the gt character
• _ - new line command (to skip a line)
• p default disk and current directory

22
DOS Disk Commands (cont)

• PATH
• Path c\c\dosa\