f2184025da
git-svn-id: https://svn.code.sf.net/p/freedos/svn/kernel/trunk@167 6ac86273-5f31-0410-b378-82cca8765d1b
103 lines
2.8 KiB
NASM
103 lines
2.8 KiB
NASM
;
|
|
; File:
|
|
; getvec.asm
|
|
; Description:
|
|
; get an interrupt vector - simple version
|
|
;
|
|
; Copyright (c) 1995
|
|
; Pasquale J. Villani
|
|
; All Rights Reserved
|
|
;
|
|
; This file is part of DOS-C.
|
|
;
|
|
; DOS-C is free software; you can redistribute it and/or
|
|
; modify it under the terms of the GNU General Public License
|
|
; as published by the Free Software Foundation; either version
|
|
; 2, or (at your option) any later version.
|
|
;
|
|
; DOS-C 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 General Public License for more details.
|
|
;
|
|
; You should have received a copy of the GNU General Public
|
|
; License along with DOS-C; see the file COPYING. If not,
|
|
; write to the Free Software Foundation, 675 Mass Ave,
|
|
; Cambridge, MA 02139, USA.
|
|
;
|
|
; $Logfile: C:/dos-c/src/drivers/getvec.asv $
|
|
;
|
|
; $Header$
|
|
;
|
|
; $Log$
|
|
; Revision 1.4 2001/03/21 02:56:25 bartoldeman
|
|
; See history.txt for changes. Bug fixes and HMA support are the main ones.
|
|
;
|
|
; Revision 1.3 2000/05/25 20:56:19 jimtabor
|
|
; Fixed project history
|
|
;
|
|
; Revision 1.2 2000/05/11 03:56:20 jimtabor
|
|
; Clean up and Release
|
|
;
|
|
; Revision 1.1.1.1 2000/05/06 19:34:53 jhall1
|
|
; The FreeDOS Kernel. A DOS kernel that aims to be 100% compatible with
|
|
; MS-DOS. Distributed under the GNU GPL.
|
|
;
|
|
; Revision 1.3 1999/08/10 17:21:08 jprice
|
|
; ror4 2011-01 patch
|
|
;
|
|
; Revision 1.2 1999/03/29 17:08:31 jprice
|
|
; ror4 changes
|
|
;
|
|
; Revision 1.1.1.1 1999/03/29 15:40:27 jprice
|
|
; New version without IPL.SYS
|
|
;
|
|
; Revision 1.2 1999/01/22 04:16:39 jprice
|
|
; Formating
|
|
;
|
|
; Revision 1.1.1.1 1999/01/20 05:51:00 jprice
|
|
; Imported sources
|
|
;
|
|
;
|
|
; Rev 1.2 29 Aug 1996 13:07:10 patv
|
|
;Bug fixes for v0.91b
|
|
;
|
|
; Rev 1.1 01 Sep 1995 18:50:40 patv
|
|
;Initial GPL release.
|
|
;
|
|
; Rev 1.0 02 Jul 1995 8:00:36 patv
|
|
;Initial revision.
|
|
;
|
|
|
|
%include "..\kernel\segs.inc"
|
|
|
|
segment HMA_TEXT
|
|
|
|
global _getvec
|
|
_getvec:
|
|
push bp
|
|
mov bp,sp
|
|
mov ax,[bp+4]
|
|
call getvec
|
|
pop bp
|
|
ret
|
|
|
|
;
|
|
; assembler version - ax = vector number
|
|
; returns vector in dx:ax
|
|
;
|
|
|
|
global getvec
|
|
getvec:
|
|
shl ax,1 ; Multiply by 4
|
|
shl ax,1
|
|
xor dx,dx ; and set segment to 0
|
|
mov es,dx
|
|
mov bx,ax
|
|
pushf ; Push flags
|
|
cli ; Disable interrupts
|
|
mov ax,[es:bx]
|
|
mov dx,[es:bx+2]
|
|
popf ; Pop flags
|
|
ret
|