robert@hslrswi.UUCP (J. Robert Ward) (07/06/87)
Hello Net,
My Blit (actually a DMD-5620) terminal works just fine when connected
to one of the DMF-32 ports of our Vax-11/750 running 4.3BSD Unix.
However, when connected to one of the DHU-11 ports of a MicroVax-II,
also running 4.3BSD, it works in boring "normal terminal" mode but the
``layers'' program does not work at all.
The symptoms are as follows when layers is started up : I can create
windows as usual but the entire program hangs after one line of input
is typed to a shell.
Has anyone seen such behaviour before or anything similar ? I am
baffled that the same binary code works properly on one 4.3 system (the
Vax-11/750) but not the other 4.3 system (MicroVax-II). Is this
anything to do with hardware or what ? Does the DHU-11 behave in some
mysteriously different way to the DMF-32 ?
Any pointers or advice would be received most gratefully.
Cheers,
- Robert.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
J. Robert Ward, ___________
Hasler AG, Belpstrasse 23, CH-3000 Berne 14, Switzerland | _ |
| _| |_ |
Tel.: +41 31 632319 | |_ _| |
X.400: robert@hslrswi.hasler | |_| |
Bitnet: robert%hslrswi.UUCP@cernvax.BITNET |_________|
Uucp: ... {seismo,ukc, ... }!mcvax!cernvax!hslrswi!robert
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ron@topaz.rutgers.edu.UUCP (07/08/87)
The behaviour of Layers locking after the first window is created is almost always the lack of an eight bit data path between the CPU and the terminal. Check the terminal modes. If you have the new 5620 firmware, you can bypass this by turning encoding on in the host options setup menu. -Ron
muller@sdcc7.UUCP (07/08/87)
Sounds like extra flow control characters are being added. The dmf hardware supports a optional "auto xon/xoff" mode (which is NOT used in 4.3). Unless the 5620 runs in "lan encoding" mode, it would hang with this as the 8 bit data sent would trigger the "auto xoff" if the dhu boards has a similar mode and it was NOT turned off. (The layers software on 4.3 runs in raw mode for the packet driver). The other way it happens if the connection from the 5620 to the machine is through a "LAN network" (like UB Net One) which add "in-band" flow control to support end-to-end flow control on the network. Keith Muller University of California