Timer0 Configuration:
                - Timer0 Mode = 16-bit
 
                - Clock Source = FOSC/4
                    (250 kHz)
 
                - Synchronous operation
 
                - Prescaler = 1:1
 
                - Postscaler = 1:2 (T0OUTPS =
                        
1) 
            
In this case the TMR0_out toggles every two rollovers of TMR0H:TMR0L. i.e.
            (0xFFFF)*2*(1/250kHz) = 524.28 ms