Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 6/24/83; site dalcs.UUCP Path: utzoo!watmath!clyde!floyd!harpo!decvax!dartvax!dalcs!z005 From: z005@dalcs.UUCP (Neil Erskine) Newsgroups: net.info-terms Subject: Re: VT100 Compatible Terminals Message-ID: <614@dalcs.UUCP> Date: Fri, 17-Feb-84 07:30:37 EST Article-I.D.: dalcs.614 Posted: Fri Feb 17 07:30:37 1984 Date-Received: Tue, 21-Feb-84 07:42:06 EST Organization: Dalhousie U, Halifax N.S. Lines: 21 While on the subject of the VT100 (essentially ANSI standard) terminals, and brain damage, does anyone out there understand why the decision was made to allow individual setting of the attribute bits through the Select Graphic Renditon sequence (ESC [ Ps;...;Ps m), and did not make a provision for individually clearing them? The only way to clear an individual attribute is to clear all of them and reset those that are still desired. This might be fine for DEC type software, where generally every- one knows what is going on everywhere, but in an environment that runs through termcap, with fields for turn on attribute, turn off attribute, it is not possible to accomplish some things. The specific case that annoyed me was the my inability to cause sysline to output entirely in half intensity by placing an "enter half intensity" in the goto status line sequence, and "exit half intensity" in the leave status line sequence. The time appears in half intensity, but when it leaves a blank space to separate fields, the half intensity bit is lost. A logical magic mushroom! Is anyone out there familiar with the committee that arrived at this standard, and if so what went wrong!