Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 6/24/83; site masscomp.UUCP Path: utzoo!watmath!clyde!masscomp!trb From: trb@masscomp.UUCP Newsgroups: net.unix-wizards Subject: Re: magic numbers Message-ID: <215@masscomp.UUCP> Date: Mon, 5-Mar-84 18:10:38 EST Article-I.D.: masscomp.215 Posted: Mon Mar 5 18:10:38 1984 Date-Received: Tue, 6-Mar-84 03:24:57 EST References: <2639@alice.UUCP> Organization: MASSCOMP, Littleton, MA Lines: 9 I just think that it was really nice that whoever put in the #! feature used the magic number 20443 for editable executables. They used the old 407 format for binary executables because it would have been hard to type and noisy to print out (407 is ^G^A). Seriously, 407 was a PDP11 Branch .+7 instruction, which was executed to jump over the a.out header. Andy Tannenbaum Masscomp Inc Westford MA (617) 692-6200 x274