/[grub]/grub/stage1/stage1.S
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revision 1.31 by okuji, Mon Nov 12 06:57:29 2001 UTC revision 1.32 by okuji, Wed Dec 19 11:37:17 2001 UTC
# Line 1  Line 1 
1  /* -*-Asm-*- */  /* -*-Asm-*- */
2  /*  /*
3   *  GRUB  --  GRand Unified Bootloader   *  GRUB  --  GRand Unified Bootloader
4   *  Copyright (C) 1999,2000   Free Software Foundation, Inc.   *  Copyright (C) 1999,2000,2001   Free Software Foundation, Inc.
5   *   *
6   *  This program is free software; you can redistribute it and/or modify   *  This program is free software; you can redistribute it and/or modify
7   *  it under the terms of the GNU General Public License as published by   *  it under the terms of the GNU General Public License as published by
# Line 148  real_start: Line 148  real_start:
148          movw    $0x55aa, %bx          movw    $0x55aa, %bx
149          int     $0x13          int     $0x13
150    
151            /*
152             *  %dl may have been clobbered by INT 13, AH=41H.
153             *  This happens, for example, with AST BIOS 1.04.
154             */
155            popw    %dx
156            pushw   %dx
157    
158          /* use CHS if fails */          /* use CHS if fails */
159          jc      chs_mode          jc      chs_mode
160          cmpw    $0xaa55, %bx          cmpw    $0xaa55, %bx

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