diff options
Diffstat (limited to 'c/src/lib/libbsp/i386/pc386/console/videoAsm.S')
| -rw-r--r-- | c/src/lib/libbsp/i386/pc386/console/videoAsm.S | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/i386/pc386/console/videoAsm.S b/c/src/lib/libbsp/i386/pc386/console/videoAsm.S new file mode 100644 index 0000000000..a8f5cb3156 --- /dev/null +++ b/c/src/lib/libbsp/i386/pc386/console/videoAsm.S @@ -0,0 +1,51 @@ +/* + * 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 + |