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* gotc.bat    : batch file for use TC 2.0
* gomsc.bat   : batch file for use MSC 5.0/6.0 
* demo91.prj  : project file for TC++3.0 or BC++ 3.1
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  DEMO91
   Demonstration for use Timer functions.
   use CountDownTimer channel 0 for LED ON/OFF
   function used:
     TimerOpen --> begin to use I-7188 timer
     TimerClose --> stop to use timer
     CountDownTimerStart  --> start to countdown a time interval
     CountDownTimerReadValue -->to decide if time is up.
   Use CountDownTimer to count 500ms(0.5s) to turn LED ON or OFF.
   press 'q' to quit program.