time delay calculations

Dear All,

I am used to program ARM7 LPC2148 IC by Keil (Version -4) in 12 MHz, pls find the below delay,

So fro that how can i Calculate the time delay (used by 12MHz in Keil software).

void delay_1()
{ int d,d1; for(d1=0;d1<100;d1++) for(d=0;d<65000;d++);
}

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