Re: [Simh] A couple of newbie SimH questions

2017-03-06 Thread Jacob Goense

On 2017-03-06 11:58, Warren Toomey wrote:
I've tried all of the SET CPU IDLE values and I can't find a value that 
lowers
the CPU usage below 100%. Is there a compile flag that I need to set? 
The

host system is Ubuntu 15.10 and Linux 4.2.0-42-generic.


I guess idle pattern detection missing or broken in simh for the 
particular

guest OS. I'll have a look.


and I can happily telnet in. Now I want to set up two SimH instances so
that one DZ line connects the two together. I've read the 
vax780_doc.doc

but I can't see how to configure an outbound connection.


This is much better document in the top comment section in
https://github.com/simh/simh/blob/master/sim_tmxr.c

A snippet below. Let me know if that doesn't help.

Line specific tcp listening ports are supported.  These are 
configured

using commands of the form:

sim> attach MUX Line=2,port{;notelnet}
Direct computer to computer connections (Virutal Null Modem cables) 
may

be established using the telnet protocol or via raw tcp sockets.

sim> attach MUX Line=2,Connect=host:port{;notelnet}
Computer to computer virtual connections can be one way (as 
illustrated
above) or symmetric.  A symmetric connection is configured by 
combining

a one way connection with a tcp listening port on the same line:
sim> attach MUX Line=2,Connect=host:port,listenport
When symmetric virtual connections are configured, incoming 
connections
on the specified listening port are checked to assure that they 
actually

come from the specified connection destination host system.
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[Simh] A couple of newbie SimH questions

2017-03-06 Thread Warren Toomey
Hi all, as part of the preparation for the Unix 50th anniversary in 2019,
I'm starting to get some Unix images up and running on SimH. What I want to
get done is to recreate some of the early networking, in particular uucp
and Usenet on top of it (with C-News).

I've built 4.2BSD and 4.3BSD images as per the instructions here:
http://gunkies.org/wiki/Installing_4.2_BSD_on_SIMH
http://gunkies.org/wiki/Installing_4.3_BSD_on_SIMH

and these run fine on SimH VAX 11/780 simulator V4.0-0 Beta git commit id: 
7c5792e9

I've tried all of the SET CPU IDLE values and I can't find a value that lowers
the CPU usage below 100%. Is there a compile flag that I need to set? The
host system is Ubuntu 15.10 and Linux 4.2.0-42-generic.

I've set up a DZ device with:
set dz lines=8
att dz 
set dz 7b

and I can happily telnet in. Now I want to set up two SimH instances so
that one DZ line connects the two together. I've read the vax780_doc.doc
but I can't see how to configure an outbound connection.

Many thanks for any tips and suggestions,
Warren


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