Micro Op SYS (DOS)
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Transcript of Micro Op SYS (DOS)
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Micro Op SYS (DOS)
Chapters 1, 2, 3, 5, 6, 7
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Hardware
• Four Categories– CPU (Central Processing Unit)– Primary Storage (RAM)– Input/Output Devices
• Keyboard• Mouse• Monitor• Printer
– Secondary Storage (Drives)
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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.
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SOFTWARE (cont)
– Application Software• Eight Categories
– Word Processing– Spreadsheet– Database Management– Communications– Mathematical Molding– Graphics– Games– Software Development Tools
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Drive Layout
• Fragmentation• Master Boot Record (MBR)• File Allocation Table (FAT)• Root Directory• Directory• Sub-Directory
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DOS
• File Naming ConventionD:\Test\filename.ext[drive] [path] [filename] [extension]Filename → Max of 8 charactersExtension → Max of 3 characters
Example:A:\test\dos\project.doc
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Extensions• Executable files
– BAT – batch file– COM – program file <64KB– EXE – program file >64KB
• 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
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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
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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
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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
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Internal DOS Commands
• Frequently used and/or relatively small DOS commands loaded into RAM when the system is booted
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DOS Commands
• CLS
• REN
• VER
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DOS Commands (cont)
• COPY– copy filename.ext a:filename.ext– Can use wildcards
• Copy *.* a:*.*
• DEL– del filename.ext– Can use wildcards
• del *.*
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DOS Commands (cont)
• TYPE– Allows you to view the contains inside of a file
without having to open another program
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External DOS Commands
• Reside on the DOS disk• Must be copied into RAM each time they
are executed
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DOS Commands
• LABEL
• CHKDSK (after DOS6.2 SCANDISK)
• DISKCOPY– Must be the same size
• UNDELETE
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DOS Commands (cont)
• ATTRIB– attrib ±A ±H ±R ±S a:filename.ext– attrib a:*.*
• XCOPY– Similar to COPY but allows you to include
subdirectories– /s must be used to copy subdirectories
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DOS Disk Commands
• CD or CHDIR
• MD or MKDIR
• RD or RMDIR
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DOS Disk Commands (cont)
• TREE
• DELTREE
• PROMPT
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DOS Disk Commands (cont)
• MOVE
• PROMPT– $t – system time– $d – system date– $n – default drive– $g – the > character– $_ - “new line” command (to skip a line)– $p – default disk and current directory
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DOS Disk Commands (cont)
• PATH– Path c:\;c:\dos;a:\