Computing.Net > Forums > Programming > what exactly is msdos.sys?

Computer Problems? Computing.Net has over 1,000,000 posts about all things technology related! Over 90% answered within 24 hours! Click here to start participating now! Also, be sure to check out the New User Guide.

what exactly is msdos.sys?

Reply to Message Icon

Name: hugabug
Date: October 18, 2004 at 21:03:35 Pacific
OS: na
CPU/Ram: na
Comment:

what exactly is msdos.sys & what does it do?



Sponsored Link
Ads by Google

Response Number 1
Name: hugabug
Date: October 18, 2004 at 21:05:22 Pacific
Reply:

I forgot another q.... what does msdos.sys have to do with windows at bootup?


0

Response Number 2
Name: Mechanix2Go
Date: October 19, 2004 at 02:26:25 Pacific
Reply:

Actually the OS matters.

The short answer is that when DOS boots, it loads io.sys msdos.sys and command.com, which are the OS.

Windows 3.x - 9x won't run without it.

NT is a different beast.

9x and, let's say, w2k, can look very much alike.

They're not.

M2


0

Response Number 3
Name: StuartS
Date: October 19, 2004 at 18:17:57 Pacific
Reply:

Depends which version of Windows you are talking about. MS-DOS.SYS along with IO.sys is/was one of the basic files for MS-DOS. Windows 3.1 was just a GUI running on top of DOS.

Windows 9X still runs on top of DOS and still uses MS-DOS.sys but now it is just a text file with information to tell the boot loader how to load Windows.

Windows NT/2000/XP don't use and don't need MS-DOS.sys at all as they do not run on top of DOS. They just have a DOS emulator built in.

Windows XP still puts IO.SYS and MS-DOS.sys in the root folder but they are empty files. What they are there for I have no idea because deleting them doesn't do any harm.

Stuart


0

Sponsored Link
Ads by Google
Reply to Message Icon

Related Posts

See More


How to make a batch file ... Oracle password



Post Locked

This post is quite old and has been locked from receiving new replies. Please create a new posting instead.


Go to Programming Forum Home


Sponsored links

Ads by Google


Results for: what exactly is msdos.sys?

what exactly is a managed code?? www.computing.net/answers/programming/what-exactly-is-a-managed-code/13332.html

what exactly is an assembly in dotn www.computing.net/answers/programming/what-exactly-is-an-assembly-in-dotn/14037.html

Flash - What is it? www.computing.net/answers/programming/flash-what-is-it/11437.html