cursor.c

来自「一个非常优秀的操作系统源代码」· C语言 代码 · 共 49 行

/* Gemini Nucleus
 *
 * $Id: cursor.c,v 1.1.1.1 2000/03/24 17:46:31 verdich Exp $
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA. 
 */

#include <pio.h>

int 
cursor_set(int x, int y)
{
  int offset = (y * 80) + x;

  outb(0x3d4, 0x0f);
  outb(0x3d5, offset & 0xff);
  outb(0x3d4, 0x0e);
  outb(0x3d5, offset >> 8);
  return 0;
}

int 
cursor_get(int *x, int *y)
{
  int offset;

  outb(0x3d4, 0x0e);
  offset = inb(0x3d5);
  offset <<= 8;
  outb(0x3d4, 0x0f);
  offset += inb(0x3d5);
  *x = offset % 80;
  *y = offset / 80;
  return 0;
}