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/* timer_isr()
*
* This routine provides the ISR for the Z8036 timer on the MVME136
* board. The timer is set up to generate an interrupt at maximum
* intervals.
*
* Input parameters: NONE
*
* Output parameters: NONE
*
* COPYRIGHT (c) 1989-1998.
* On-Line Applications Research Corporation (OAR).
* Copyright assigned to U.S. Government, 1994.
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.OARcorp.com/rtems/license.html.
*
* $Id$
*/
#include "asm.h"
BEGIN_CODE
EXTERN (Ttimer_val)
PUBLIC (timerisr)
SYM (timerisr):
addl $250, SYM (Ttimer_val) # another 250 microseconds
pushl eax
movb 0xa0,al /* signal generic End Of Interrupt (EOI) to slave PIC */
outb al, $0x20
movb $0x20, al
outb al, $0x20 /* signal generic EOI to Master PIC */
popl eax
iret
END_CODE
END
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