void display() interrupt 1

[Amit Kumar]

void display() interrupt 1        //Function to display the number using seven segmnet multiplexing. For more details refer seven segment multiplexing.

{

TL0=0x36;        //Reloading Timer0

TH0=0xf6;

P2=0xFF;

dig_ctrl_1 = dig_ctrl_3 = dig_ctrl_2 = dig_ctrl_4 = 0;

dig_disp++;

dig_disp=dig_disp%4;

dig_disp is meant for what. It is variable, i understand it. But this variable is for what? & why it is written dig_disp=dig_disp%4;