Timer0 and Stopwatch Mplab6

[Max]

Use pic16f84, clock 4Mhz and TIMER0
I must obtain interrupt every 1 msec

using stopwatch of mplab sim and controlling BREAKPOINT (inside interrupt TIMER0) i obtain interrupt every 1.030 mSec
there are 30 microsecond ones more

you can help?
thanks


#define TIMER_TICK 131 // 1 ms a 4.00 MHz

int8 centomilli, unsecondo, unminuto;

#int_TIMER0
TIMER0_isr()
{
set_timer0(TIMER_TICK); // ricarica timer0
centomilli--; //****** SET BREAKPOINT for MPLAB SIM
}


void main()
{

setup_timer_0(RTCC_INTERNAL|RTCC_DIV_8);
set_timer0(TIMER_TICK);
enable_interrupts(INT_TIMER0);
enable_interrupts(global);

set_tris_B(0b11111111);
set_tris_A(0b00000000);
centomilli = 100;
unsecondo = 10;
unminuto = 60;

while(1)
{
.....
.....
}

[Ttelmah]