Pocket DOS

PocketDOS is a powerful virtual PC software environment for your pocket computer that allows you to run a DOS operating system and have instant access to many DOS applications* on your pocket computer, whilst simultaneously allowing the use of the pocket computer's native applications. PocketDOS also allows DOS applications to access serial ports, built-in modems, infrared ports, bluetooth devices, removable storage disks, touchscreens and shared network resources, and allows file sharing between the pocket computer's native applications and DOS applications.

Classic DOS Games

Ever wanted to play your favorite computer games again? Download the best MS-DOS games for free from this site. Over 500 DOS freeware/shareware games, with download-able games, reviews, screen-shots, links, free email, and much more!

To Download visit:

• DOS games online
• DOS Games
• DOS Games Archive
  

ROM-DOS

Fully compatible DOS, runs from disk or ROM.
ROM-DOS was originally developed to run from ROMs in handheld computers and other embedded systems, but it also runs from a floppy or fixed disk. The main download package contains versions 6.22 and 7.1. Both are compatible with other DOSes that have similar version numbers, but with added features: Full support for FAT32/LBA hard disks and Long File Names (up to 260 chars), ZModem file transfer, TCP/IP stack, and much more. Free for personal use.
Runs on Intel 80186+, NEC V-series, and other compatible CPUs. ROM-DOS can be used as the base for Win3.x/9x, and as the secondary command processor under any Windows.

Directory Management

1.) Creating Directories

c:\>MD apple

2.) Changing Directories

c:\>CD apple

3.) Deleting a directory

c:\>RD apple

4.) Delete directory with all its contents

c:\>Deltree Images

5.) Displaying the directories

c:\>DIR

c:\>DIR c:\WS

c:\>DIR A:

6.) Viewing directory widthwise

c:\>DIR/w

7.) Viewing the list of selected items using switches

Switch Functions

/on ---> a......z order

/o-n ---> z.....a order

/oe ---> extension in z....a order

/od ---> according to date oldest first, latest last

/o-d ---> latest first, oldest last

/os ---> small files first according to file size

/o-s ---> Decreasing files size order

/ad ---> See only sub-directories

9.) Copying the directories

c:\>XCOPY \WS\Letters\Personal A:

c:\>XCOPY A: B:

c:\>XCOPY A:\C:\New

10.) Copying sub-directories

c:\>XCOPY c:\Back A:\ /s/e

11.) Changing directory name

c:\>XCOPY\ACCT New\ACCT= old

c:\>DEL\ACCT/New\*.*

c:\>RD\ACCT/New

DOS File Management

1.) Creating a file
c:\>copy con filename
type here the content of the file
e.g
c:\> copy con telephonedir
this is a text file.
it contains all telephone numbers.
Then press F6 to exit.

2.) Deleting a file
c:\>DEL a:\employee\myfile.bak
c:\WS>DEL assignment.doc

3.) Deleting a group of files
c:\>DEL *.jpg

4.) Displaying the file (using TYPE or PRINT)
c:\>TYPE assignment.doc
c:\>PRINT c:\WS\FINANCE.doc

5.) See list of files inside any directory
c:\>DIR c:\LOTUS
c:\>DIR
/P- Page wise sorted
/W- width wise
/AD- see sub-directories
c:\>DIR/P

6.) Copy files to floppy disk
c:\>copy c:\Lotus\123.exe
c:\>copy auto.bat A:

7.) Copying a group of files
c:\>copy A: A *.bak

8.) Changing file name & then copy
c:\>copy fast.dbf c:\quick.dbf

9.) Combining text files
c:\>copy News1.txt+News2.txt+News3.txt News.txt

10.) Copying and printing the file
c:\>copy A: office.Prn LPT1

11.) Moving the files
c:\>Move c:\surbhi\*.* c:\kapil

12.) Undelete file
c:\>undelete c:\ws\apple.doc

DOS Commands

1.) Version
C:\>ver

2.) Help
C:\>topic name/?

3.) To pause command in-between
press ctrl+s or pause

4.) To stop any command
ctrl+c or ctrl+pause

5.) Change drive
c:\>a:
output- a:\>

6.) Tree structure
c:\Back>tree

7.) Change directory
c:\>cd\ws\doc
output- c:\ws\doc>

8.) To get out from one directory
c:\ws\doc>cd..

9.) To reach root directory
c:\ws\doc>cd\

10.) To get date & time
c:\>Time
c:\>date

11.) Clear screen
c:\>cls

DOS Basic Concepts

DOS- Software that operates the computer system.

• Purpose- File management, Disk management


• When we switch ON the system, DOS automatically loads on RAM if it is working as operating system.


• It is saved in the file named "COMMAND.COM" .


• Its supporting programs are saved in some hidden file i.e. IO.SYS & MSDOS.SYS. The group of these programs are known as bootable program. When it loads on memory. That process is known as 'booting'.

Functions of DOS

• operates computer hardware


• Configuration setting- setting of all the hardware components, after that microprocessor able to establish connection


• Directory management- make directory on disk


• File management- make, read, write, copy, print, rename, delete file


• Disk management- manage free space on disk, format disk etc.

Working of DOS :
a.) Boot Record- The record read by ROM first in booting process.
b.) IO.SYS- It simply resets all devices and disk.
c.) MSDOS.SYS- It links all the application programs with io.sys.
d.) COMMAND.COM- Also known as command processor. It reads the commands and do work according to that.

If error occurs in booting process :
Error- Bad or missing command interpreter
It means there is no bootable program present in disk.

Priority :
1. Floppy
2. Hard disk
3. USB drive

File naming :
" firstname.extension"
e.g. sun.text (text file)
Rules for naming a file:
1.) Can use
a) A,B,C,.........,Z & a,b,c,.........,z
b) 0,1,2,........,9
c) @, #, $, %, (, )
2.) Can't use
a) Blank space, "," (comma), Backspace, "."
b) Reserve words- AUX, COM1, COM2, COM3, COM4, LPT1, LPT2, LPT3, NUL, PRN
c) Punctuation marks- ^, *, =, +, [, ], :, ", \,, /, ?, <, >

File extension :
.exe- executable file
.com- command file
.sys- sytem file
.bat- batch file
.bak- backup file
.doc- document file
.dbf- database file
.wk3- worksheet file