Clearing the screen

[JamesParsons]

I need a simple function to clear the screen of inputs and outputs. something that works like MS-DOS CLS command does anyone know how to implement one. I need to do it in either assembly or C/C++. Also it would be nice to know what it is doing so if you give me code can it be commented?

[iansjack]

So you have a screen that is full of characters, which presumes that you can print a character. And you want to fill it with blanks - space characters. And you can't see how to do that?

I think you should try something simpler than OS development.

[bluemoon]

I need a simple function to clear the screen of inputs and outputs.

If that screen is also capable of input, is that some kind of multi-touch screen?

something that works like MS-DOS CLS command does anyone know how to implement one.

Yes, I think many people know how to implement one, but instead of MS-DOS CLS it's probably a terminal emulator instead.

I need to do it in either assembly or C/C++. Also it would be nice to know what it is doing so if you give me code can it be commented?

No. Your requirement is ambiguous (do you want to clear the VGA, or virtual terminal buffer, or something exotic?) How does your OS deal with the target device (VGA or virtual), Give us a brief description of your OS (real mode, protected mode, design model, etc), Dos you want a clear-screen function used by kernel/driver, or solely for debugging purpose, or you actually want an CLS application that can be called by shell?

Furthermore, the chance that somebody bored enough to spend his own time doing your work is infinitesimally small; but if you show us what effort you have done you can probably get more help - it's just easier for you and the helper.

With none information given, the best you could get maybe:

Code: Select all

memset ( p, 0, 80*25*2 );

[JamesParsons]

I think iansjack is right. I've been around this forum asking stupid questions. The problem is this OS-Dev stuff takes a lot of general Computer Knowledge and a basic understanding of how the entire computer works. I've been doing general programming for a while not focusing on other computer topics. I'm going to do something simpler than OS-Dev. I'm going back to writing general software.


ps. is there some way I can remove these posts

[xenos]

ps. is there some way I can remove these posts

I need a simple function to clear the screen of inputs and outputs.

Same problem again?

So you have a screen that is full of characters, which presumes that you can print a character. And you want to fill it with blanks - space characters. And you can't see how to do that?

[JamesParsons]

all I can find on the programmers hardware database is specification on a bunch of ARM processors. At that I have to click the random page to get to anything with content

[Brynet-Inc]

all I can find on the programmers hardware database is specification on a bunch of ARM processors. At that I have to click the random page to get to anything with content

It's his forum signature.

EDIT: Removed 2015: Imageshack replaced all links with spam.

[JamesParsons]

oh I was being a little slow for a moment