Fri, 28 Jul 1995 18:05:50 +0200 added rotate_tac
nipkow [Fri, 28 Jul 1995 18:05:50 +0200] rev 1212
added rotate_tac
(0) -1000 -300 -100 -30 -10 -1 +1 +10 +30 +100 +300 +1000 +3000 +10000 +30000 tip