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* gotc.bat    : batch file for use TC 2.0
* gomsc.bat   : batch file for use MSC 5.0/6.0 
* demo7.prj   : project file for TC++3.0 or BC++ 3.1
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1. the miniBIOS will reset the watchdog timer after the 7188 first power on
2. the program use EnableWDT to tell miniBIOS --> stop reset watchdog timer
3. then this program will reset watchdog timer
4. the user can press any key to stop reset watchdog timer
5. the watchdog timer is fixed at 1.6 sec --> after 1.6 sec the 7188 will reset
6. if the user PRESS ANY KEY before 1.6 sec --> this program use DisableWDT
   to tell ROM-DOS to reset watchdog timer again --> 7188 will not reset
7. in the rormal condition, the program will
   1. EnableWDT()
   2. continue reset watchdog timer by RefreshWDT()
   3. before program stop, DisableWDT()