source: rtems/c/src/lib/libbsp/i386/pc386/console/videoAsm.S @ debbc9e

/*
 * videoAsm.S  - This file contains code for displaying cursor on the console
 *
 * Copyright (C) 1998  valette@crf.canon.fr
 *
 * This code is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This code 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 * $Id$
 */

        .file "videoAsm.s"

#include <crt.h>

        .text
        .align 4
        .globl  wr_cursor       /* Move cursor position */

/*
 *      void wr_cursor(newPosition, ioBaseAddr)
 */

wr_cursor:      pushl   %ecx
                movl    8(%esp), %ecx           /* Get new cursor position */
                movb    $CC_CURSHIGH, %al       /* Cursor high location */
                movl    12(%esp), %edx          /* Get IO base address */
                outb    (%dx)
                incw    %dx                     /* Program Data register */
                movb    %ch, %al
                outb    (%dx)                   /* Update high location cursor */
                decw    %dx                     /* Program Index Register */
                movb    $CC_CURSLOW, %al        /* Cursor low location */
                outb    (%dx)
                incw    %dx                     /* Program Data Register */
                movb    %cl, %al
                outb    (%dx)                   /* Update low location cursor */
                popl    %ecx
                ret