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/* timer_isr()
*
* This routine provides the ISR for the timer. The timer is set up
* to generate an interrupt at maximum intervals.
*
* Input parameters: NONE
*
* Output parameters: NONE
*
* COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
* On-Line Applications Research Corporation (OAR).
* All rights assigned to U.S. Government, 1994.
*
* This material may be reproduced by or for the U.S. Government pursuant
* to the copyright license under the clause at DFARS 252.227-7013. This
* notice must appear in all copies of this file and its derivatives.
*
* $Id$
*/
#include "asm.h"
BEGIN_CODE
EXTERN(_Ttimer_val)
PUBLIC(timerisr)
SYM (timerisr):
addl $1,_Ttimer_val # another tick
push edx
push eax
movw $0x20,dx
mov edx,eax
outb al,(dx) # touch interrupt controller
pop eax
pop edx
iret
END_CODE
END
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