5a7a27df70
git-svn-id: https://svn.code.sf.net/p/freedos/svn/kernel/trunk@538 6ac86273-5f31-0410-b378-82cca8765d1b
58 lines
1.7 KiB
NASM
58 lines
1.7 KiB
NASM
;
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; File:
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; getvec.asm
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; Description:
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; get an interrupt vector - simple version
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;
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; Copyright (c) 1995
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; Pasquale J. Villani
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; All Rights Reserved
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;
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; This file is part of DOS-C.
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;
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; DOS-C is free software; you can redistribute it and/or
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; modify it under the terms of the GNU General Public License
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; as published by the Free Software Foundation; either version
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; 2, or (at your option) any later version.
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;
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; DOS-C is distributed in the hope that it will be useful, but
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; WITHOUT ANY WARRANTY; without even the implied warranty of
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; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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; the GNU General Public License for more details.
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;
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; You should have received a copy of the GNU General Public
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; License along with DOS-C; see the file COPYING. If not,
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; write to the Free Software Foundation, 675 Mass Ave,
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; Cambridge, MA 02139, USA.
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;
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; $Header$
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;
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%include "..\kernel\segs.inc"
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segment HMA_TEXT
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global _getvec
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_getvec:
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mov bx,sp
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mov ax,[ss:bx+2]
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;
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; assembler version - ax = vector number
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; returns vector in dx:ax
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;
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global getvec
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getvec:
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shl ax,1 ; Multiply by 4
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shl ax,1
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xor dx,dx ; and set segment to 0
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mov es,dx
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mov bx,ax
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pushf ; Push flags
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cli ; Disable interrupts
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mov ax,[es:bx]
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mov dx,[es:bx+2]
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popf ; Pop flags
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ret
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