Re: writing to the screen

[patrick dey <parviz_linux2@yahoo.com>]

Hi james,

thanks for your reply.

I want to do this in C. I'm not sure if you are
familiar with this, but in dos there was a way to
allocate part of memory which belong to Video card and
after allocation, anything that you write in that part
of memory would appear on your screen.
I was wondering if there is a way like that in Linux??

regards,
Patrik
--- james@spunkysoftware.com wrote:
> If you're using assmbly language, you can call C
> functions to write to the
> screen, arguments are pushed onto the stack from
> right to left, and you add
> 4 to esp for every argument you pushed onto the
> stack, and if the function
> returns a value it will be in eax for you.
> 
> Here is an example snippet for NASM:
> 
> fmt    db    "%s",0
> message    db    "A Message From printf...",10,0
> 
> ...
> 
> push dword message
> push dword fmt
> call printf
> add esp, 8
> 
> 
> You don't need the format string in this example
> though.
> 
> 
> ----- Original Message -----
> From: "patrick dey" <parviz_linux2@yahoo.com>
> To: <kernelnewbies@nl.linux.org>
> Sent: Friday, July 13, 2001 1:25 PM
> Subject: writing to the screen
> 
> 
> > Hi all,
> >
> > could some one please tell me how to write to
> screen.
> > I just started low level programming with linux.
> > any usefull links??
> >
> > thanks
> >
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