Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!rutgers!pyrnj!dasys1!pechter From: pechter@dasys1.UUCP (Bill Pechter) Newsgroups: comp.terminals Subject: Re: Mysterious VT100 behaviors Keywords: vt100 undocumented behavior information wanted Message-ID: <6249@dasys1.UUCP> Date: 4 Sep 88 13:18:10 GMT References: <13801@agate.BERKELEY.EDU> Reply-To: pechter@dasys1.UUCP (Bill Pechter) Organization: Datamerica Systems, NYC Lines: 28 In article <13801@agate.BERKELEY.EDU> koonce@math.berkeley.edu writes: >When testing out a vt100 emulator program, a friend of mine discovered >that EVE running under VMS expects it to interpret ^Z [ ... q as an >LED command. This is undocumented, and runs contrary to the documentation >I have. Does anyone have more information about this or any other undocumented "features" of the vt100 series? There'a a number of undocumented "features" on the VT100 - some of which are real nasty microcode bugs in the firmware. The [a;b;c;d q series which are used for the leds are a bear. There's a pattern that turns on the LOCAL (or was it ON LINE) led regardless of whether the terminal was on line. Another turned on the bell continuously, another was a high speed autorepeat. Hit a key and it filled the screen. I believe DECUS had someone write an article about this for the Vax Pageswapper SIG publication. I'd love a copy if anyone has it. We used to send the bell one around at DEC as a "letter bomb" -- send the sequence to someone to read and BOOM. Mail now filters the sequences! -- Bill Pechter {sun!hoptoad,cmcl2!phri}!dasys1!pechter USnail 103 Governors Road, Lakewood, NJ 08701 AT&T 201-370-0709 Evenings