Aucbvax.6296 fa.info-terms utcsrgv!utzoo!decvax!ucbvax!info-terms Thu Feb 25 07:55:30 1982 Quirk in Ann Arbor Ambassadors >From z@CCA-UNIX Thu Feb 25 07:53:07 1982 There is an interesting bug in earlier versions of the Ann Arbor Ambassador which can cause some rather strange symptoms. The META key on these terminals normally turns on the eighth bit in every character transmitted. The problem occurs if you happen to be holding down the META key at the same time the terminal transmits an automatic XOFF for flow control. What happens is that the eighth bit gets turned on in the flow control character. For me, this problem occurred using my EMACS on Unix. The result was that Unix saw this character with the eighth bit on and didn't recognize it as a flow control character, so it continued to transmit characters and the display got messed up. Meanwhile, Unix passed the character on to EMACS, which executed it as a command ("join lines"). Checking our other Ambassadors, it turned out that some had this problem while others didn't. I talked to Ann Arbor, and they knew of the problem, and said that it was fixed in later versions of the terminal's PROM. To find out what version you have, type T[c. If the number that appears in the monitor line is 01;11, you have the earlier, buggy version; if the number if 01;13, you have the later, fixed version. Ann Arbor said they would sell me the newer PROM for $300 each. After a little discussion, they agreed to exchange new ones for the old ones, as long as we shipped them the old ones first. They would not ship us the new ones before receiving the old ones. ----------------------------------------------------------------- gopher://quux.org/ conversion by John Goerzen of http://communication.ucsd.edu/A-News/ This Usenet Oldnews Archive article may be copied and distributed freely, provided: 1. There is no money collected for the text(s) of the articles. 2. The following notice remains appended to each copy: The Usenet Oldnews Archive: Compilation Copyright (C) 1981, 1996 Bruce Jones, Henry Spencer, David Wiseman.