C Program to write to the memory

kushalkoolwal · 05-30-2008, 03:01 PM

I am trying to write a very simple C program in which I am trying to write to the memory on my computer in DOS. I have the following pseudo-code:

Code:

#include <stdio.h>

#define ADDRESSOFMEMORY 0xe0000 //address of memory
#define SIZEOFMEMORY 0x4000  //size of meory

int main(char** argv,int argc)
{ 
    int memoffset;
    short * memory;
    short data=0x1111;

<<SOME FUNCTION TO ACCESS THE MEMORY JUST LIKE MMAP fuction in Linux>>
memory=<<Access the memorymap>>


//Write fuction

   for(memoffset=0x0;memoffset<0x16;memoffset+=2)  
    {
	memory[memoffset]=data;   
    }

Any ideas how can I do this?

indienick · 05-30-2008, 03:59 PM

I thought mmap() was part of the C standard library, but it turns out, it's only for POSIX-compliant systems.

Check out this link: http://guideme.itgo.com/atozofc/. I don't know if it will help you, but from glancing over the first page, it seems like it might answer your question.

seraphim172 · 05-30-2008, 04:30 PM

What DOS version do you use? Most GNU tools are or have been available for DOS systems as well, so it shouldn't be a big deal to add GCC and a POSIX-compliant C library to your system.
(GCC for DOS was called DGCPP or something like that - it's been a long time...)

Linux Archive

kushalkoolwal · 05-30-2008, 05:11 PM

Quote:

Originally Posted by seraphim172

What DOS version do you use? Most GNU tools are or have been available for DOS systems as well, so it shouldn't be a big deal to add GCC and a POSIX-compliant C library to your system.
(GCC for DOS was called DGCPP or something like that - it's been a long time...)

I am using DOs 6.22. ACtually I have the C program written in Linux (GNU C) and I need to convert the program so that it can run on DOS. Hence I posted this question to the forum.