struct reg86u r;

	r.u.w.ax = SET_VBE_MODE; // VBE call, function 02 -- set VBE mode
	r.u.w.bx = 1<<14 | 0x105; // set bit 14: linear framebuffer
	r.u.b.intno = 0x10;

	if( sys_int86(&r) != OK ) {
	printf("set_vbe_mode: sys_int86() failed \n");return NULL;
	}

	//vg_exit();

	vbe_mode_info_t vmi_p;
	if(vbe_get_mode_info(mode,&vmi_p)!=0){
		printf("vbe return failed");return NULL;
	}

	//vg_exit();

	h_res = vmi_p.XResolution;
	v_res = vmi_p.YResolution;
	bits_per_pixel = vmi_p.BitsPerPixel;

	vg_exit();

	struct mem_range mr;

	//vg_exit();

	unsigned int vram_base = VRAM_PHYS_ADDR; /*VRAM’s physical addresss*/
	unsigned int vram_size = v_res * h_res * (bits_per_pixel /8); /*VRAM’s size, but you can use the frame-buffer size, instead*/

	//vg_exit();

	/*Allow memory mapping*/
	mr.mr_base = (phys_bytes) vram_base;
	mr.mr_limit = mr.mr_base + vram_size;

	//vg_exit();

	int ans;
	if (OK != (ans = sys_privctl(SELF, SYS_PRIV_ADD_MEM, &mr)))
		panic("sys_privctl (ADD_MEM) failed: %d\n", r);

	//vg_exit();

	/*Map memory*/

	video_mem = vm_map_phys(SELF, (void *) mr.mr_base, vram_size);
	if (video_mem == MAP_FAILED)
		panic("couldn’t map video memory");


	vg_exit(); //este vg_exit não faz sair

	return video_mem;