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MS-DOS
MS-DOS is a 16-bit operating system for IBM PC-compatibles. It was developed and sold by Microsoft in the early 90s. Although no longer in common use, it is still used to load some diagnostic and repair utilities even on modern computers.
500 Questions
What is the Ms-DOS Structure?
Asked by Informationhub
Disks are always divided up into tracks and sectors, as shown in figure. To access any particular block of data, the program first moves to the correct track, then has you wait while the spinning disk moves the correct sector under the head.
Is DOS a graphical operating system?
Asked by Wiki User
DOS is a CLI (Command Line Interface) Operating System..
How did MS-DOS originally get its start?
Asked by Wiki User
History of DOS.
DOS has become the accepted name for the line of operating systems whose names have included QDOS, 86-DOS, IBM Personal Computer DOS, and MS-DOS. At its peak, DOS was by far the most widely used computer program in the world. While at one time "DOS" was a generic term for "Disk Operating System", this is no longer the case, at least within the personal computer industry. ("OS" is now the generic term.)
Although DOS became popular by tagging along with the success of the IBM Personal Computer, its origin actually goes back to an earlier generation of microcomputers. The first widely used microcomputers were built around a chassis called the S-100 Bus. This began with the introduction of the Altair 8800 by Micro Instrumentation and Telemetry Systems in 1975. The motherboard of the Altair had no active components on it - just a row of 100-pin connectors. The connectors would accept a 5" x 10" circuit board that added a specific function to the computer. The microprocessor itself would be on the CPU card; additional cards would have memory (RAM) and interfaces to a Tele Type or keyboard and video display.
In 1978, Seattle Computer Products (SCP) of Tukwila, Washington, was a manufacturer of S-100 memory cards. One of their customers was the only computer store in Seattle at the time, The Retail Computer Store. The store's repair technician, Tim Paterson, was a full-time student at the University of Washington and user of an IMSAI 8080 microcomputer since 1976. When the owner of SCP, Rod Brock, came by the store to make deliveries and take orders, Paterson complained about some problems they were having with the product. After Paterson graduated that June, he went directly to work for SCP to fix those problems. Paterson was the only full-time engineer at SCP, and all design was turned over to him.
In July of 1978, Intel released their new 8086 microprocessor. Brock sent Paterson to an Intel seminar to find out what it was all about. Up until that time, almost all S-100 computers used the Intel 8080 microprocessor or the newer and faster Zilog Z80. Both were 8-bit microprocessors, and could run the same software. The 8086 was a 16-bit microprocessor with the potential to be much faster, although existing 8-bit software would not run on it.
Brock gave Paterson the go-ahead to begin designing an 8086 CPU card for the S-100 Bus, and the first prototypes were working in May, 1979. SCP contacted Microsoft to see about getting 16-bit software for their new computer. As it turned out, Microsoft was fully underway developing software for the 8086, and they were ready to test it on real hardware. Microsoft had moved from Albuquerque, New Mexico, to Bellevue, Washington in early 1979, just a 30-minute drive from SCP's offices. Paterson packed up the prototype and set to work with Bob O'Rear at Microsoft to bring up Stand-Alone Disk BASIC on it.
SCP began shipping their 8086 computer system in November 1979 with Microsoft Stand-Alone Disk BASIC as the only software to run on it. Although BASIC was a suitable programming language for hobbyists to use on their own machines, very little commercial software was written with it. In order to get a software base for their machine that would make it truly useful, SCP needed a general-purpose operating system for it.
Among 8-bit computers, the CP/M operating system from Digital Research had become the standard. Digital Research was known to be working on a 16-bit version for the 8086 microprocessor, CP/M-86, and had expressed interest in using a prototype of the SCP 8086 CPU card to aid in their development (SCP declined). CP/M-86 was expected to be available by the end of 1979.
By April of 1980, CP/M-86 had not yet arrived and SCP was very concerned. Sales of the 8086 computer system were minimal, since only developers or hobbyists who wanted to be on the leading edge would be interested in computer with no real software.
Paterson proposed to Brock that SCP take control of the situation by writing their own operating system instead of relying on someone else. Paterson had graduated with a Bachelor of Science in Computer Science, Magna Cum Laude. Although he had gone directly to work for SCP after graduation, he also dabbled in graduate school. The coursework included a class in operating systems, and he wrote a multi-tasking operating system for the Z80 microprocessor as a term project. He felt qualified to write an operating system for the 8086, and thought he could make it better than CP/M. Paterson proposed a two-phase software development project: first, a quick and dirty operating system, to fill the immediate need for SCP's 8086 computer; second (and never realized), a much more refined operating system available in both a single-user and multi-user version. Again, Brock gave Paterson the go-ahead.
Paterson's primary objective in the design of DOS was to make it as easy as possible for software developers to write applications for it. To achieve this, Paterson sought to make the Application Program Interface (API) compatible with CP/M. While a given 8-bit program written for CP/M could not be directly run on the 16-bit 8086, it was possible for that program's author to translate it in a semi-automated process so that it would. CP/M compatibility of the API was key to making the translated program run correctly. Also, it was hoped that the familiarity of the CP/M-style API would make it easier for developers to learn to write programs for DOS.
The secondary objective in the design of DOS was to make it fast and efficient, so it was written entirely in 8086 assembly language. Paterson was particularly concerned about the way files were organized on disk; he felt that the format used by CP/M was a significant bottleneck. After evaluating techniques used by Unix, ISIS, UCSD P-System, and others, he settled on a variation of the system used by Microsoft Stand-Alone Disk BASIC. It used a File Allocation Table (FAT), which was extremely compact. To Paterson, it seemed quite suitable for the 1.2 MB floppy disks of the day, and could handle disks up to 64 MB, if microcomputers ever needed anything of that size!
Over the months from April through July, 1980, Paterson was able to spend about half his time working on QDOS, the Quick and Dirty Operating System. It began shipping with the 8086 computer system in August. SCP approached Microsoft about adapting their software to run under DOS, who said it was possible - for a price.
Shortly afterward, Microsoft came back to SCP with a different proposal. Microsoft offered to market DOS for SCP, and they already had the first customer lined up, although they couldn't reveal who it was. They made a deal: Microsoft would pay SCP $10,000 for the right to market DOS, and $15,000 for each OEM customer. The per-customer figure was half of what SCP figured was the going rate for a flat-fee license, which was a common arrangement at the time. So SCP came away with $25,000 in cash, and Microsoft had obtained an operating system for their secret customer, IBM.
Microsoft had been with working with IBM on their personal computer project since the outset. Microsoft originally sent IBM to Digital Research for the operating system, but IBM felt rebuffed when Digital Research would not sign a non-disclosure agreement. So Microsoft offered them an alternative by striking the deal with SCP for DOS.
In July of 1981, the month before the IBM Personal Computer was announced, Microsoft offered to buy DOS (now called 86-DOS) from SCP instead of continuing to pay a $15,000 per-customer royalty. This would give Microsoft flexibility in pricing, and return SCP back to its roots as a hardware company. Microsoft paid $50,000, plus a license for SCP to include DOS with their computer systems. Five years later, Microsoft and a struggling SCP fought a legal battle over the specifics of that DOS license; in the end, it was settled by Microsoft buying the license back for a reported $925,000. Thus Microsoft's payments to SCP for DOS ended up totaling an even $1,000,000.
In the early days of the IBM PC, DOS was viewed as IBM's proprietary operating system. Microsoft set out to change that in 1982 by trying to interest their OEM customers - who were primarily buying Microsoft's programming languages - to sign up for DOS as well (now called MS-DOS), in direct competition with CP/M-86. Although Microsoft had previously committed to developing CP/M-86 versions of their products, they were eventually able to convert every customer to DOS versions instead - in one case, by simply giving DOS away. That saved them considerable development effort, and at the same time made CP/M-86 less attractive since it didn't run any of Microsoft's software.
Microsoft's marketing combined with the success of the IBM PC and compatibles made DOS a runaway hit for 15 years. Microsoft kept improving and evolving it, often by including in DOS features that had been available in programs from third parties. The beginning of the end came in 1995 with Microsoft's release of Windows 95, which had the function of DOS built in. Microsoft stopped updating DOS after that, as part of a strategy to move from the 16-bit DOS world to a new 32-bit world of Windows 95 and Windows NT.
What is the last version of MS-DOS?
Asked by Bspkumar
The latest that existed by itself was MS-DOS 6.22. For a while, however, Windows was partially integrated with DOS, so these MS-DOS versions could be extracted. Windows 95 revision 1 identified as MS-DOS 7; Win 95 rev 2 and Win 98 were MS-DOS 7.1 (which had support for the FAT32 file system), and Windows ME had MS-DOS 8. You can extract the DOS from Win 9x (not ME) by modifying the file MSDOS.SYS, changing the line saying "bootgui=1" to "bootgui=0" and setting the config.sys SHELL statement to the command.com that came with Windows. Someone has done this and packaged it; google "MS-DOS 7.10" and you will find it.
Also, any time you format a disk in Windows newer than ME, you get the option to make a MS-DOS startup disk. This is MS-DOS 8. By making such a disk and using the utilities from MS-DOS 6.22, you can have a working MS-DOS 8. The VER command will still report the Windows version you used.
- MS-DOS 1.x
- Version 1.0 (Retail) - August 1981
- Version 1.1 (Retail)
- Version 1.12 (Retail)
- Version 1.25 (Retail) - August 1982
- MS-DOS 2.x
- Version 2.0 (Retail) - March 1983
- Version 2.1 (Retail)
- Version 2.11 (Retail)
- Version 2.2 (Retail)
- Version 2.21 (Retail)
- MS-DOS 3.x
- Version 3.0 (Retail) - For IBM PC AT
- Version 3.1 (Retail) - For Networks
- Version 3.2 (Retail) - April 1986
- Version 3.21 (Retail) - April 1987
- Version 3.25 (Retail)
- Version 3.3 (Retail)
- Version 3.3a (Retail)
- Version 3.3r (Retail)
- Version 3.31 (Retail)
- Version 3.35 (Retail)
- MS-DOS 4.x
- Version 4.0 (Retail) - July 1988
- Version 4.01 (Retail) - November 1988
- MS-DOS 5.x
- Version 5.0 (Beta 1) - June 1991
- Version 5.0 (Retail)
- Version 5.0a (Retail)
- MS-DOS 6.x
- Version 6.0 (Retail) - August 1993
- Version 6.1 (Retail)
- Version 6.2b (RTM)
- Version 6.2 (Retail) - November 1993
- Version 6.21 (Retail) - March 1994
- Version 6.22 (Retail) - April 1994
- MS-DOS 7.x
- Version 7.0 (Beta)
- Version 7.1 (Retail)
How do you open a program in command prompt?
Asked by Wiki User
You don't directly write programs on the command prompt, but you can use programs to run commands off the command prompt. They're called batch files (or command files .cmd) There are a few guides for proper syntax in batch files, as well as ways to use the many commands. A lot of them can be found by typing "help" into the command prompt.
Batch files are simple scripts that do easy tasks, such as opening files, copying directories, and deleting files. You can make menus on them and open selective files upon startup too.
They don't even need to be compiled. Just use a text editor (Notepad or
another program designed for scripting) and write the commands with correct syntax. It's simple and runs line-by-line. Save it as a file with a .bat file name extension, or as a .cmd extension. The files are written in Microsoft DOS format.
At the command prompt you can use what command to control how user accounts can access files and folders?
Asked by JAYRAD1
cacls
In ms dos which command can sort files in a directory list?
Asked by Wiki User
dir
Lists all files and directories in the directory that you are currently in.
dir /ad
List only the directories in the current directory. If you need to move into one of the directories listed use the CD command.
dir /s
Lists the files in the directory that you are in and all sub directories after that directory, if you are at root "C:\>" and type this command this will list to you every file and directory on the C: drive of the computer.
dir /p
If the directory has a lot of files and you cannot read all the files as they scroll by, you can use this command and it will display all files one page at a time.
dir /w
If you don't need the info on the date / time and other information on the files, you can use this command to list just the files and directories going horizontally, taking as little as space needed.
dir /s /w /p
This would list all the files and directories in the current directory and the sub directories after that, in wide format and one page at a time.
dir /on
List the files in alphabetical order by the names of the files.
dir /o-n
List the files in reverse alphabetical order by the names of the files.
dir \ /s |find "i" |more
A nice command to list all directories on the hard drive, one screen page at a time, and see the number of files in each directory and the amount of space each occupies.
dir > myfile.txt
Takes the output of dir and re-routes it to the file myfile.txt instead of outputting it to the screen.
What is the DOS command to change the name of a file?
Asked by Wiki User
we may use << ( redirection) operator it will append the data of file........
What is the importance of DOS in Windows?
Asked by Wiki User
dos environment has importance because it provides a set of cammands that enable the users to interface to acess or manipulate information on their disk, as well as simly interact with their computer.
What are the features of MS-DOS?
Asked by Wiki User
the characteristics are
1-it is very easy to use
2-it has single user operating system
3-it works only in micro computer
4-ut supports batch processing system
5-it supports verity of software
6-provides commands line interface to the user
7-some important terms associated with some importance.
What is the command to list all files in a directory?
Asked by Wiki User
ls (ie lower case LS)
In DOS: dir
If there are many files in the directory, type, "dir/p/o" ...this will stop the listing when the page fills up and list them in alphabetical order... press any key to continue to the next page of listed files.
If you're only interested in the name of the files (not the date/size etc.) you can add /B
What replaced MS DOS?
Asked by Wiki User
Nothing replaced it, MS-DOS is a command line interface Operating System, it is still used by Windows Operating Systems to this date, but access to it by the user has been severely limited if not completely blocked, to protect the computer from severe user error at the command line level.
What is generally used for web browsing email and word processing on the go?
Asked by Wiki User
Netbooks
How much did a DOS system cost?
Asked by Wiki User
DOS computers are no longer sold on the mainstream market. Dell sells some barebones computers bundled with FreeDOS, due to licensing restrictions, but most of the hardware would be unusable in DOS.
Quite frankly, you can probably buy an old, used computer with the hardware to run most DOS programs for about 10 bucks. Any Pentium II or Pentium III with an ISA slot (for a SoundBlaster card) should be good enough to run most applications that are not timing-dependent. On a commercial scale, you would almost certainly want to get a contract with an embedded systems design company to build "new" DOS computers.
How do you delete zoosk messenger?
Asked by Wiki User
To remove your profile from Zoosk, please deactivate your account. Click on "settings" on Zoosk, and then click on "Account". Finally, scroll to the bottom of the page and click on the link that says "Deactivate your Zoosk account".
What are internal and external commands of DOS?
Asked by Wiki User
Internal DOS commands are those provided internally by cmd.exe:
BREAK, CD/CHDIR, CHCP, CLS, COPY, CTTY, DATE, DEL/ERASE, DIR, EXIT, LOADHIGH, LOCK, MD/MKDIR, PATH, PROMPT, RD/RMDIR, SET, TIME, TRUENAME, TYPE, UNLOCK, VER, VOL, VERIFY.
External commands are those provided by separate executables.
Basic and important versions of dos?
Asked by Wiki User
- MS-DOS 1.x
- Version 1.0 (Retail) - August 1981
- Version 1.1 (Retail)
- Version 1.12 (Retail)
- Version 1.25 (Retail) - August 1982
- MS-DOS 2.x
- Version 2.0 (Retail) - March 1983
- Version 2.1 (Retail)
- Version 2.11 (Retail)
- Version 2.2 (Retail)
- Version 2.21 (Retail)
- MS-DOS 3.x
- Version 3.0 (Retail) - For IBM PC AT
- Version 3.1 (Retail) - For Networks
- Version 3.2 (Retail) - April 1986
- Version 3.21 (Retail) - April 1987
- Version 3.25 (Retail)
- Version 3.3 (Retail)
- Version 3.3a (Retail)
- Version 3.3r (Retail)
- Version 3.31 (Retail)
- Version 3.35 (Retail)
- MS-DOS 4.x
- Version 4.0 (Retail) - July 1988
- Version 4.01 (Retail) - November 1988
- MS-DOS 5.x
- Version 5.0 (Beta 1) - June 1991
- Version 5.0 (Retail)
- Version 5.0a (Retail)
- MS-DOS 6.x
- Version 6.0 (Retail) - August 1993
- Version 6.1 (Retail)
- Version 6.2b (RTM)
- Version 6.2 (Retail) - November 1993
- Version 6.21 (Retail) - March 1994
- Version 6.22 (Retail) - April 1994
- MS-DOS 7.x
- Version 7.0 (Beta)
- Version 7.1 (Retail)
Which is a single user operating system?
Asked by Wiki User
A single-user operating system is a type of operating system (OS) that is developed and intended for use on a computer or similar machine that will only have a single user at any given time. This is the most common type of OS used on a home computer, as well as on computers in offices and other work environments. There are two general types of single-user operating system: single task and multitasking systems. Though a single-user operating system can be connected to other systems through a network, it is still truly only used by a single person and is different than a multi-user OS. A single-user operating system that is a single task system is developed for use with a computer or electronic device that will only run one application at a time. This type of OS is typically used on devices such as wireless phones and two-way messaging devices. A single task, single-user operating system can only run one program or application at a time, and so is not as useful for a computer or other device intended to run multiple programs at once.
How do you use telnet?
Asked by Wiki User
If you use the Windows OS check out this link from Microsoft.
http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/telnet_commands.mspx?mfr=true
Telnet: TELNET (TELetype NETwork) is a network protocol used on the Internet or local area network (LAN) connections. It was developed in 1969 and standardized as IETF STD 8, one of the first Internet standards.
Follow some step:-
Step # 1: First, open a command prompt. To open a command prompt window, click Start, Run and then type in cmd and press Enter. You can also press the +R to open the Run prompt and then type in cmd in the open text box.
Step # 2: You need to know a remote mail server. If you are still in school or working, there is the excellent opportunity to use your University mail server or your company's mail server for this.
type in telnet RemoteMailServer 25 at the command prompt. The Remote mail server here in this command is the mail server of your school or company. It is usually mailhost..edu or compmail..com or something on those lines. When you press enter, you are shown a quick prompt that you are connecting to the remote mail server.
Step # 3: Introduce yourself to the mail server. Play around a bit.
type in helo mailhost at the command prompt. The mail server responds back with something like this
250 RemoteMailHost. Hello , pleased to meet you.
Step # 4: You can now enter your email address.
type in mail from: your email id @ blah.com
The mail server responds back with a 250 … sender ok
Step # 5: You can now enter your receipient's email address
type in rcpt to: recipient email id @ blah.com
The mail server responds back with a "Recipient OK" message
Step # 6: Now, you are ready to type in the body of the email message.
type in data and press enter.
Now, type your message and then finally press Enter. To end your message type in a single period "." . Your message is now in the queue
Step # 7: To complete and finish the process, type in quit and press enter. The mail server responds with a "Bye" after which you see a "Connection to host lost" message displayed.
Can you run ms-dos in Windows 98?
Asked by Wiki User
Not all but most DOS software can run on Windows 98..
How do you read Sam file?
Asked by Wiki User
sam file is located inside C:\ windows system 32 config folder ypu have to stop the file process by booting window with mini xp download hirenboot and burn it boot windows and install hiren boot (it is not an operating system its just like a layer over window ( no need to worry installing it) and then access sam file C:\ windows\system\32\config\sam open it on notepad
