[comp.sys.hp] HP 700/X terminal, R3 compat, but R4 ?~r

EYRING@cc.utah.edu (12/19/90)

We have an HP 700/X X window graphics terminal, its a 20 inch 256 colors
box.  We have a Sun 3/470 running 4.1 OS using Open Windows 2.0.  OW 2.0
is X11R4, but the software for the x server from HP is X11R3.  Every
since I got the fonts converted from sun format to .snf HP server format
and started working with the server full time, olwm, I have had odd results
from it.  It blows up occasionally.  First thought this was due to not
enough memory onboard the server, so we went from 1 to 2 Megs on the
700/X HP server.  That didn't solve the problem.  After continual use,
say 3 or 4 programs running interactively, and with occasional use.
The system will lock up and maybe a dissassembly window appears,
on the HP 700/X server,
    ...
    Illegal opcode at FFD6F2F0
    FFF42500:   ...
    FFF42600:   ...
    FFF42700:   ...
    FFF42800:   ...
    panic: halted
    ...

I have also looked at the HP 700/X memory statistics and seen the
Amount installed      2048 Kb     Number fragments         33
Free pool            99547 Kb     Largest fragment     197379 Kb
                     ^^^^                                ^^^^^
                     |-------------------------------------|
                                  |
                                  |= big problem here!


I can only think of 2 remaining problems left, since the mem upgrade
did not cure it.
1. X11R4 Sun client software is not compatible with HPs X11R3 server
   software.   Someone should know about this, its an easy one right?
   Could R4 calls to a R3 server make the mem manager screw up so badly?
2. The HP 700/X X window graphics terminal memory manager has a serious
   bug in it.
We ran mem diagnostics on the HP and everything passed.

Any insights or comments would be greatly appreciated.

>bob witmer
>Eyring Inc., Flight Simulation
>Salt Lake City, Utah
>eyring!rcw@snowbird.sun.com or eyring@cc.utah.edu