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Using interrupts is really fun. The interrupts give the absoulte power to the programer. The bios routine can directly be executed. things like accesing the flopy in low leve and reading sector by sector. Reading the time from bios CMOS.
in order to execute a interrupt and get the result u need to do following steps. first define union REGS inregs,outregs pass the subroutine value through the inregs
invoke an interrupt with the int86 command and get the result in out regsthis is the procedure to run any interrupt subroutine.
As i already explained how to use intrepput routine in BIOS now here is example to get the time from the CMOS
12345678910111213141516#include<dos.h><br />#include<stdio.h><br />void main()<br />{<br />int size[10],i=0;<br />union REGS inregs,outregs;<br />inregs.h.ah=0x02;<br />int86(0x1A,&inregs,&outregs);<br />size[0]=outregs.h.ch;<br />size[1]=outregs.h.cl;<br />size[2]=outregs.h.dh;<br />size[3]=outregs.h.dl;<br />printf("n%d",size);<br />for(i=1;i<=3;i++)<br />printf(":%d",size);<br />}
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