LPC2106 Timer 0 with interrupt

#include "LPC2000.h"

void sys_init();
__attribute__ ((interrupt)) void timer0 (void);

int main()
{

    sys_init();

    T0_TCR = 0x03;            //Reset counter and prescaler
    T0_PR = 0x30;                 //Load Prescaler register for 1usec tick, formula --> toHex(1msec/(1/pclk))
    T0_IR = 0x01;             //Reset timer0 interrupt
    T0_MCR = 0x03;                        //interrupt and reset on MR0
    T0_MR0 = 0x01;                        //match to 1 TC iterations
    VICVectCntl0 = 0x00000024;            //use it for Timer 0 Interrupt
    VICVectAddr0 = (unsigned)timer0;      //set interrupt vector 0
    VICIntEnable = 0x00000010;            //enable TIMER0 interrupt
    T0_TCR = 0x01;                        //enable Timer0

    GPIO0_IODIR = 0x0F;
    GPIO0_IOCLR = 0x0F;
    while(1);
}

__attribute__ ((interrupt)) void timer0 (void)
{
    T0_IR = 0x01;               //clear interrupt
    VICVectAddr = 0;            //end of interrupt - dummy write
}


//-------------------------------------------------
void sys_init()
{
    /* System Init */
    /* Init PLL */
    SCB_PLLCFG = 0x22;                 //Msel*fosc,  Msel = 3, Psel = 2, fosc = 16MHz

    SCB_PLLFEED = 0xAA; SCB_PLLFEED = 0x55;

    SCB_PLLCON = 0x01;                         // Enable PLL
    SCB_PLLFEED = 0xAA; SCB_PLLFEED = 0x55;

    while ( !(SCB_PLLSTAT & 0x0400) );         // Wait for PLL to lock

    SCB_PLLCON = 0x03;                                // Connect PLL as clock source
    SCB_PLLFEED = 0xAA; SCB_PLLFEED = 0x55;

    /* Init MAM & Flash memory fetch */
    MAM_MAMCR=0x2;                                    // MAM = flash
    MAM_MAMTIM=0x4;

    SCB_VPBDIV =0x01; //pclk = cclk
}