Octagon PC-510, User Manual

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20-2
User-defined jumper PC-510 user’s manual
Comments: This function returns the jumper settings.
Programming example:
/* The following example program reads the user defined
jumper */
unsigned char jumpers;
asm {
mov ax,0fb0bh
mov dx,0ffffh
int 17h
mov jumpers, al
}
if(jumpers & 1)
/* look at bit 2*/
printf("User jumper U installed\n);
else
printf("User jumper U not installed\n);
/* note: jumper 2 not available on all boards */
if (jumpers & 2)
printf("User jumper U2 installed\n);
else
printf("User jumper U2 not installed\n);