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author | Joel Sherrill <joel.sherrill@OARcorp.com> | 1995-07-12 19:47:25 +0000 |
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committer | Joel Sherrill <joel.sherrill@OARcorp.com> | 1995-07-12 19:47:25 +0000 |
commit | 637df35f96d8023056369fcf2c9943419f1a1b74 (patch) | |
tree | a12bd461bf892ccaff6c67571432f0535eb03e96 /c/src/lib/libbsp/i386/go32/timer/timerisr.s | |
parent | added David Glessner's 68302 work. (diff) | |
download | rtems-637df35f96d8023056369fcf2c9943419f1a1b74.tar.bz2 |
Ada95, gnat, go32
Diffstat (limited to 'c/src/lib/libbsp/i386/go32/timer/timerisr.s')
-rw-r--r-- | c/src/lib/libbsp/i386/go32/timer/timerisr.s | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/i386/go32/timer/timerisr.s b/c/src/lib/libbsp/i386/go32/timer/timerisr.s new file mode 100644 index 0000000000..d68c3a7940 --- /dev/null +++ b/c/src/lib/libbsp/i386/go32/timer/timerisr.s @@ -0,0 +1,39 @@ +# 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) + +SYM (_timerisr): + addl $250,_Ttimer_val # another 250 microseconds + push edx + push eax + movw $0x20,dx + mov edx,eax + outb al,(dx) # touch interrupt controller + pop eax + pop edx + iret + +END_CODE +END |