Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84 exptools; site ihnet.UUCP Path: utzoo!watmath!clyde!burl!ulysses!mhuxr!ihnp4!ihnet!tjr From: tjr@ihnet.UUCP (Tom Roberts) Newsgroups: net.graphics Subject: x3.64 vs x3.110 (NAPLPS) Message-ID: <210@ihnet.UUCP> Date: Mon, 11-Mar-85 13:35:48 EST Article-I.D.: ihnet.210 Posted: Mon Mar 11 13:35:48 1985 Date-Received: Tue, 12-Mar-85 22:11:22 EST Distribution: net Organization: AT&T Bell Laboratories Lines: 19 I am building an MC68000-based terminal, and would like to implement both a standard ASCII terminal (X3.64), and a graphics terminal (NAPLPS, X3.110). Does anyone know how to do this? The problem is that these standards conflict in their usage of several control-codes and escape-sequences. X3.110 mentions an escape-sequence to select X3.110 mode, but the important character-value is MISSING (to be assigned by ISO). Does anyone know what it is? Is there a similar sequence to select X3.64 mode? A related question: What is the best way to implement device- specific operations (e.g. program downloads)? In X3.110, lower-level protocol layers (e.g. the session layer) could handle this. Also, there are several control characters which are reserved for device-specific actions - they could be used as introducers. Which is preferable? Tom Roberts ihnp4!ihnet!tjr