fst@mcgp1.UUCP (Skip Tavakkolian) (10/03/88)
I seem to have problems disabling xon-xoff flow control on DecServer 200 for use with emacs. Even though the port is configured for no flow control, I still get random ^S/^Q sequence which seem to be originating from the DecServers. Does anyone have this problem? can it be fixed? DecServers are hooked to a VAX runing Ultrix 2.2. Many Thanks. -- Fariborz ``Skip'' Tavakkolian UUCP ...!uw-beaver!tikal!mcgp1!fst UNIX is a registered trademark of AT&T
dieter@nmt.edu (The Demented Teddy Bear) (10/11/88)
In article <1599@mcgp1.UUCP>, fst@mcgp1 (Skip Tavakkolian) writes: >I seem to have problems disabling xon-xoff flow control on DecServer 200 >for use with emacs. Even though the port is configured for no flow control, >I still get random ^S/^Q sequence which seem to be originating from the >DecServers. Does anyone have this problem? can it be fixed? DecServers >are hooked to a VAX runing Ultrix 2.2. Once the flow control gets turned off, it generally stays off. I'm more suspicious of whatever terminal you are using. Going by the hard- ware you've described, it seems likely that you have a VT-xxx. These beasts *like* XON-XOFF flow-control. Try going into SETUP mode and setting flow-control to NONE. Some caveats: On a VT-220, you have to tell it to emulate a VT-100 and send the VT-100 identifier, otherwise you might get reset to VT-220 mode (VMS will do this, as an example). Poof! no more escape key. Also, at 9600 baud, you will get trash when scrolling via ^N every once in a while. ^L will fix, but it is annoying. I couldn't get a satisfactory combination of flow-control and usability out of a VT-220, DecServer 200, uVax II, and VMS. Maybe your mileage will vary. Come to think of it, there might not have been enough wires to handle true hardware flow control on that line. Try it and see. Dieter -- Welcome to the island. You are number six. ...cmcl2!lanl!unm-la!unmvax!nmtsun!dieter dieter%nmt@relay.cs.net dieter@nmt.edu
fst@mcgp1.UUCP (Skip Tavakkolian) (10/15/88)
In article <1282@nmtsun.nmt.edu>, dieter@nmt.edu (The Demented Teddy Bear) writes: > In article <1599@mcgp1.UUCP>, fst@mcgp1 (Skip Tavakkolian) writes: > >I seem to have problems disabling xon-xoff flow control on DecServer 200 > >for use with emacs. Even though the port is configured for no flow control, > >I still get random ^S/^Q sequence which seem to be originating from the > >DecServers. Does anyone have this problem? can it be fixed? DecServers > >are hooked to a VAX runing Ultrix 2.2. > > Once the flow control gets turned off, it generally stays off. I'm > more suspicious of whatever terminal you are using. Going by the hard- > ware you've described, it seems likely that you have a VT-xxx. These > beasts *like* XON-XOFF flow-control. Try going into SETUP mode and > setting flow-control to NONE. [deleted] > > Dieter > -- > Welcome to the island. You are number six. > ...cmcl2!lanl!unm-la!unmvax!nmtsun!dieter > dieter%nmt@relay.cs.net > dieter@nmt.edu I should have done this in my original (above) posting. Here is the complete picture: ------ ------- -------- --------- | AT&T | | AT&T | | DEC | | DEC | | 630 |<---->|DATAKIT|<-->| DS200 |<---->| VAX8250 | | | ^ | | ^ | | ^ | | ------ | ------- | -------- | --------- | | | +------+------+ Ethernet | DKXON=OFF, DVXON=OFF (Datakit setting, no XON/XOFF) Decserver 200 setting are set for no flow control. I am sure Datakit is not the cause since I have UUCP and Blit protocol running on it. That leaves my terminal and DS200/VAX. I am sure the problem is not at the terminal, since I have set it not to generate XON/XOFF. (I do lose data on the 630 when there is a long output; I have tested this against a 3B2-600.) So this leaves the piece of garbage DS200 and how it talks to the VAX. Many thanks. -- Fariborz ``Skip'' Tavakkolian UUCP ...!uw-beaver!tikal!mcgp1!fst UNIX is a registered trademark of AT&T