gordon@prls.UUCP (Gordon Vickers) (10/13/90)
I wrote an application program a few years ago that opens
device files (/dev/ttyxx's) and communicates with some primitive
data collection boxes via LADS lines.
Now that my VAX will finnally get moved to our corporate compus
it looks like I'll be able to connect to ethernet. It would be nice
if, at the same time, I connect my magic boxes to terminal servers
and do away with the LADS lines that currently connect my VAX with
each of our other buildings.
I am totally unfamiliar with the ethernet environment but I have
been told that I could probably connect my boxes to ports on terminal
servers and operate those ports in "reverse LAT" mode. If that is
true (and I hope it is), my next problem is figuring out how to
change my application program so it can communicate with this type
of port.
Hopefully, each of the terminal servers would be serviced by my
VAX and I could simply change device filenames in my application's
source code (Is that correct ?). It is very likely howerver, that
some of this ports will be on terminal servers serviced by other hosts.
I am currently using ULTRIX 3.2, soon to install 4.0 on a VAX 11/750.
My intent is to write portable code so I can more easily replace the VAX.
Any help, ideas, etc will be greatly welcomed.
Thank you;
Gordon Vickers 408/991-5370 {mips,pyramid|philabs}!prls!gordon
Signetics in Sunnyvale,Ca (USA)
Earth is a complex array of symbiotic relationships: Every extinction, whether
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