Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84; site ulysses.UUCP Path: utzoo!linus!decvax!decwrl!ucbvax!ulysses!pajb From: pajb@ulysses.UUCP (Paul Bennett) Newsgroups: net.emacs Subject: Re: termcap cs string Message-ID: <1133@ulysses.UUCP> Date: Mon, 4-Nov-85 09:49:08 EST Article-I.D.: ulysses.1133 Posted: Mon Nov 4 09:49:08 1985 Date-Received: Tue, 5-Nov-85 21:59:54 EST Organization: AT&T Bell Laboratories, Murray Hill Lines: 41 In article aks@umcp-cd.UUCP writes ........... >Also, Zenith has a newer terminal, the H/Z-49, which allows flow control to >be completely disabled; however, this will require padding at appropriate >points, but also a proportional amount to the number of normal chars output, >effectively reducing the baud rate (we use 9600 baud). Doesn't flow control cause the same thing ? I mean that's how it works, by temporariliy reducing the data rate, so the terminal can catch up. I've run GNUemacs on hp's and a Teletype 5620 running layers and standalone. By experimenting for about 10 minutes, I got the padding for the hp's just right - it now doesn't send a XOFF at all while running GNU emacs. I don't want to turn it off, because then it doesn't work with the rest of Unix properly. I can see NO difference in the effective baud/display rate, I have a VERY useful incremental search on the keys where it has always been (and which is mnemonic, too), and I have no problem with screen updates. I run at 9600 baud. Nowhere in the ASCII standard, or RS-232 for that matter, are DC1/DC3 defined as flow control characters. To use them for such is to implement a flow control scheme that is NOT transparent to the domain of possible transmission values. This is bad design. A flow control scheme which allows all possible values to pass unheeded is to be preferred. One such a scheme can be implemented by judicious use of padding - another is to make use of hardware flow control. This is of course the ideal, and is in line with RS-232. -- Paul. UUCP: {decvax,allegra,vax135,ucbvax}!ulysses!circe!pajb DDD: (201) 582 7346 USPS: AT&T Bell Labs, Room 5E-103, Murray Hill, NJ 07974 .. I don't care WHO you are, you're not walking on the water while I'M fishing.