[Simh] EXT :Re: Questions regarding future simulator development

[Hittner, David T (IS)]

Matt,

How does this serial solution address changing the removable media when your administrators need to connect to the sim> prompt from a continent away?
I would think that the solution really should be network-based rather than serial.

Dave

-----Original Message-----
From: simh-bounces at trailing-edge.com [mailto:simh-bounces at trailing-edge.com] On Behalf Of Matt
Sent: Wednesday, April 10, 2013 3:52 PM
To: simh at trailing-edge.com
Subject: EXT :Re: [Simh] Questions regarding future simulator development

On 10/04/2013 17:27, Christian Gauger-Cosgrove wrote:
> 1. Some way of interacting with devices while the simulator is still 
> running. What I mean would be some way of breaking to the "sim>"
> prompt without halting the simulated CPU. So one could do things like 
> swap disk packs, floppy diskettes and magnetic tapes without halting 
> the system. Kind of like the way the Hercules emulator let's you 
> affect the system on the fly.
>
My solution to this is to designate one of the serial ports to communicating with Simh. For example with the VAX simulator running VMS you could SET HOST/DTE TTn: which would give a sim> prompt and allow you to type a subset of the Simh commands. The advantage of this approach is that it does not require any special software to be installed on the guest system and does not require any additional threads on the host.
It's on my todo list, but I have many other Simh projects in progress at the moment so it may be a while before I can look at it.

Matt
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