/* hexbin - convert two hex digits to binary byte value */
	hexbin: proc(s) returns(fixed(15));
	dcl
	    s        char(8) varying,
	    v        fixed(15),
	    i        fixed(7);
	
	%replace
	    HEXDIGITS  by '123456789ABCDEF';

	v = 0;
	    do i = 1 to length(s);
	    v = v * 16 + index(HEXDIGITS, substr(s,i,1));
	    end;
	return(v);
	end hexbin;