Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10 5/3/83; site umcp-cs.UUCP Path: utzoo!watmath!clyde!floyd!harpo!seismo!rlgvax!cvl!umcp-cs!stevek From: stevek@umcp-cs.UUCP Newsgroups: net.micro Subject: Re: PDP-8 xregs Message-ID: <5389@umcp-cs.UUCP> Date: Thu, 23-Feb-84 12:03:54 EST Article-I.D.: umcp-cs.5389 Posted: Thu Feb 23 12:03:54 1984 Date-Received: Fri, 24-Feb-84 02:36:07 EST References: <560@druxp.UUCP> Organization: Univ. of Maryland, Computer Science Dept. Lines: 14 The PDP-8 has 8 page zero auto-inc registers but DG expanded? this feature? on the NOVA to 8 page zero auto-inc AND 8 page zero auto-dec registers. Sigh! if they (DG) had only made it possible to use them so that they mappped to the same locations ... then we could use them as stack pointers - an indirect thru 20-27 would auto-inc and 30-37 would auto-dec . Voila stack pointers. This message brought to you via a NOVA 830, 192kbytes ,RDOS system. Stephen Kogge University of Maryland Department of Computer Science