ds3100/uws 2.x xon/xoff LAT problem

[Matt Thomas]

In article <J1&##+ at rpi.edu>, todd at unix.ecs.rpi.edu (R. Lindsay Todd) writes:
> In article <229 at asihub.AUTOSYS.COM> dan at asihub.AUTOSYS.COM (Dan
O'Neill) writes:
> >
> >	When connecting to a DS3100 from a LAT (local area terminal
> >	server), xon and xoff are not handled correctly.
> >
> >	The C-X C-S (save file command) will stop output to the
> >	terminal until C-Q is pressed.
> >
> >	This problem does not occur on a DS5400 under Ultrix 3.1-C-0
> >	Rev 42.

You've installed the 3.1C mandatory patches, right?  That has the fix
for flow control (as well as all the other currently-available fixes).

> >Is there any possible fix for this?  Is it something that will be
> >fixed under UWS 4.0 for the DS3100?

It is fixed in V4.0.

> This is also a problem with VAXen running Ultrix 3.1/UWS 2.[12].  I called
> DEC just a couple weeks ago about this problem; the best they could do was
> submit an SPR.  Perhaps there is a patch for RISC machines only?

There is a patch available for this problem (and has been for >3 months) for
both RISC and VAX.  Contact your CSC.

> Oh yes -- the DECperson I talked to (Atlanta CSC) had to submit a QAR for
> Ultrix 4.0/RISC, since it was a problem there too; hopefully it will be fixed
> before this is released!

As I said, it is fixed in V4.0.  In V4.0 or with the patches, flow control
is enabled by having ^S/^Q as the start and stop characters and having
IXON set.
If either is false, then the session is in passall mode.  If ICANON,
ISIG, ICRNL,
IUCLC, IGNCR, INLCR are all clear then the port is in pasthru mode otherwise
the session is in normal, interactive mode.

BTW, if you use kermit, compile it in SystemV (make sys3) mode. 
Otherwise it will
put the session into passall mode (it disables the stopc and startc characters)
and you won't get reliable transfers.  In System V mode, it will
termio(4) which
will interact with LAT properly.  
-- 
Matt Thomas                     Internet:   thomas at decwrl.dec.com
DECnet-ULTRIX Development       UUCP:       ...!decwrl!thomas
Digital Equipment Corporation   Disclaimer: This message reflects my own
Littleton, MA                               warped views, etc.