how can I modify this programme?
 

The following programme runs succefully under ms-dos
but it can't run under linux(red hat 7.2)

is there some code that can perform the same function,and ,
of course,can run succeful under linux!



#include<stdio.h>

typedef struct texel_struct{
unsigned char ch;
unsigned char attr;
}texel;

typedef texel screen_array[25][80];
screen_array far * screen_ptr = (screen_array far *)0xb8000000L ;
#define screen (*screen_ptr)

main()
{
clrscr();
screen[0][0].ch = 'a';
screen[0][0].attr = 0x58;
getchar();
}


Thanks in advance!

I barely remember something about far keyword being no longer supported in new versions of gcc compilers (dont know which ones) maybe has something to do with that

Hano

Thanks!
 

Thank you Hano!

do you know
how can I assign memory address to pointer directly?

something like this:

char * ptr = 0x80000000;

Thanks in advance!

fundamentals in linux says about user mode & kernel mode,
you are not previlaged to refer addresses other than address of that process in linux user mode.
You can try it inside kernel module ( just for test for which i am not too sure).(i think this as home work for me too).

if all you want to do is clear the screen..

create function

cls()
{
for(i=0; i<=25; ++i)
printf("\n");
}

thats how I do it in C

cls()
{
for(i=0; i<=25; ++i)
cout >> "newline"
}

I obviously dont know C++ syntax, but that is a shot at it..

then whenever you need to clear screen, call cls();

winter

Thanks all.

I will try all of the ways that you offered!