Pozdrav,
prodjose svi silni praznici i ja konacno nadjoh vremena da poradim na ovom problemu.Ovako stoji stanje,nasao sam skoro gotov program,malo sam ga samo preradio i izgleda da skoro pa radi.Evo prvo programa pa da napisem čemu je još ostao problem:

/*Header******************************************************/

unsigned short cnt; // Define variable cnt

void interrupt() {
cnt++ ; // Interrupt causes cnt to be incremented by 1
PIR1.TMR1IF = 0; // Reset bit TMR1IF
TMR1H = 0x80; // TMR1H and TMR1L timer registers are returned
TMR1L = 0x00; // their initial values
}

void main() {

GPIO = 0b000000; // Initial value of port B bits
TRISIO = 0; // Port B pins are configured as outputs
T1CON = 1; // Set timer TMR1
PIR1.TMR1IF = 0; // Reset bit TMR1IF
TMR1H = 0x80; // Set initial value for timer TMR1
TMR1L = 0x00;
PIE1.TMR1IE = 1; // Enable interrupt on overflow
cnt = 0; // Reset variable cnt
INTCON = 0xC0; // Enable interrupt (bits GIE and PEIE)

do { // Endless loop
if (cnt == 76) { // Change port B state after 76 interrupts
GPIO = ~GPIO; // Number in port B is inverted
cnt = 0; // Reset variable cnt
}
} while (1);
}

Menjanjem TMR1H i TMR1L s ne desava ništa!?Tajmer broji stalno maksimalnih 65535 impulsa sa eksternog oscilatora.Koristim kvarc od 8MHz.Menjanjem broja interapta dobijam promenu...