Chen Xiao Fan wrote:
> I do not think PR1 will change once you load a literal value
> into it. PR1 is the Period Register. TMR1 is the Timer 1
> register and it will count up in timer mode with a rate
> depending on the pre-scaler.
>
> >From the manual:
> "The 16-bit timer has the ability to generate an interrupt
> on period match. When the timer count matches the
> period register, the T1IF bit is asserted and an interrupt
> will be generated, if enabled. The T1IF bit must be
> cleared in software. The timer interrupt flag T1IF is
> located in the IFS0 control register in the Interrupt
> Controller."
>   
.
Gosh, how dumb can I get!  It is perfectly obvious.  Just check the T1IF 
bit!  In self-defense, I did RTFM, but missed the implication.  Getting 
old, too much coffee, not enough sleep.  Thank you very much,  Xiao Fan. 

John
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