3 * Copyright (C) 1998-2002 Brian Palmer <brianp@sginet.com>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
27 EXTERN(_ChainLoadBiosBootSectorCode)
30 call x86_64_SwitchToReal
33 /* Set the boot drive */
36 /* Load segment registers */
46 // ljmpl $0x0000,$0x7C00
52 call x86_64_SwitchToReal
59 // Set the word at location 40:72 to 1234h
60 mov word ptr [si], 0x1234
62 // and jump to location FFFF:0 in ROM
63 // ljmpl $0xFFFF,$0x0000