[Simh] telnet sim> console / remote controlling the sim via python

[Mark Pizzolato - Info Comm]

On Monday, September 21, 2015 at 11:41 AM, Mark Benson wrote:
> I have a vague recollection of seeing and/or using this feature, but it might
> have been an independent mod, but is there facility to access the
> sim> console via telnet? Everything else is telnet-able, it would make
> sense.
> 
> I would like to control the simulator via a python library and the
> simplest answer seemed, initially, to be telnet, unless someone else has
> a better bright idea for it?

The current simh codebase has a remote console capability.  

There are two modes of remote console:
1) An "extra console" mode where the remote console connection can enter some commands to the running simulator.  These commands are:

    EXAMINE
    DEPOSIT
    EVALUATE
    ATTACH
    DETACH
    ASSIGN
    DEASSIGN
    CONTINUE
    STEP
    PWD
    SAVE
    DIR
    LS
    ECHO
    SET
    SHOW
    HELP

2) A master console mode where the primary simh session input is delegated to a telnet connection.  In master mode, the following commands are supported:

    EXAMINE
    DEPOSIT
    EVALUATE
    ATTACH
    DETACH
    ASSIGN
    DEASSIGN
    CONTINUE
    STEP
    PWD
    SAVE
    CD
    DIR
    LS
    ECHO
    SET
    SHOW
    HELP
    EXIT
    QUIT
    RUN
    GO
    BOOT
    BREAK
    NOBREAK

An API exists which leverages the remote console capabilities to facilitate applications which want to initiate and monitor and control simulators.  See sim_frontpanel.h for the API definition and frontpanel/FrontPanelTest.c for a sample/test application which uses the API.

- Mark