wrpcclk.asm

来自「开源DOS的C代码源程序」· 汇编 代码 · 共 50 行

;
; File:
;                         wrpcclk.asm
; Description:
;                  WritePCClock - sysclock support
;
;                       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.
;
; $Header: /cvsroot/freedos/kernel/drivers/wrpcclk.asm,v 1.12 2004/04/09 13:47:19 bartoldeman Exp $
;
        %include "../kernel/segs.inc"

segment HMA_TEXT


;
;       VOID WritePCClock(Ticks)
;       ULONG Ticks;
;
                global  WRITEPCCLOCK
WRITEPCCLOCK:
;               Ticks = 4
		pop	ax			; return address
		pop	dx
		pop	cx			; Ticks
		push	ax			; restore stack
                mov     ah,1
                int     1ah
                ret