Thread: asm problem

Hi!

I compile this code:

Code:

#include <stdio.h>
typedef unsigned int word;
typedef unsigned char byte;

static byte ch;

int main()
{
    ch = 'a';
    // izpise crko 'a' na zaslon.
    asm(".intel_syntax noprefix
         mov ah, 0xA
	 mov al, [ch]
	 mov bh, 0x0
         mov bl, 0x0
         mov cx, 0x01
	 int 10");
    return(0);
}

This should print one 'a' on the screen. But instead of that it segfault. Why?

1. Linux isn't likely to be using BIOS interrupts

Somewhere I spotted kernel interrupt 80, what can it do and where can i get detailed info about it?

hi
try to use system calls. just move the required data to registers and call "int 0x80". That's all....
see the unistd.h file for the system call numbers.
They make life easier

visit http://linuxassembly.org for asm usage under UNIX systems.