I caught the bug,

There was nothing wrong with the calculations in my code. It was the micro 89c51 that was causing error.

In fact it was 89c51 marked with 12PC on it means that it would work upto 12 MHz and I was using 12 MHz crystal with it meaning I was running the micro at the edge of its limit.

1- Therefore it was loosing time with original calculations. I modified the Original Code to remove the error,now say ----- Code-A.

2- Then I ran the error fixed Code-A with same crystal but with 2051 micro with 24PC stamped on it and it started gaining time. So I again modified the code to fix the error, now say ----- Code-B.

Result:

Code-B = Original Code with calculations using 12 MHz crystal.

Any Comments, please.

Babar/