Timer 0

For a data acquisition program, what would be the effects of reprogramming 
the timer 0 (change the countdown value) and the corresponding interrupt 
vector address to point to my hardware handler routine from within a RT 
thread?  I would do this for a few seconds and then return it to its prior 
settings.  This is what I used to do in a DOS program for very good 
interrupt timing.  I also disabled all other interrupts for those critical 
seconds, and read the CMOS clock and updated the system time of day clock 
when finished.

Ed Lankford


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