3 ms·See also http://world.std.com/~jlr/doom/doom_eng.htm http://world.std.com/~jlr/doom/doom_eng.htmby mtraven 15y agoSee also http://world.std.com/~jlr/doom/doom_eng.htm http://world.std.com/~jlr/doom/doom_eng.htm