Subversion Repositories openrisc_2011-10-31

/*

 * 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: videoAsm.S,v 1.2 2001-09-27 11:59:48 chris Exp $

 */

        .file "videoAsm.s"

#include 

        .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