[Simh] EXT :Re: C9.io

Fri Dec 1 15:51:31 EST 2017

The networking shouldn't be a problem since I only want to use my cellphone
as a telnet client.

On Dec 1, 2017 3:47 PM, "Timothe Litt" <litt at ieee.org> wrote:

Xeon etc is probably overkill.

Use a Raspberry Pi.  About 7W under load with a monitor, KB, mouse w/WiFi
active - you don't need a monitor, KB, or mouse once setup.  You can
disable the WiFi. (A couple more watts if you use a magnetic drive, which I
recommend).

One time cost is about $100 once you add a case, power supply & SD card to
the $35 board.

For a reasonable workload, that should suffice and is about as inexpensive
to run as you can get.  Pi 3 is a 64-bit ARM CPU @1.2 GHz CPU - with 1GB
memory, ethernet, WiFi, & bluetooth. (Some  OSs are only 32 bit at the
moment.)  You can easily scale up with multiple hosts - it takes quite a
number to reach the price of a Xeon.

If you stick with standard packages, security is pretty much one-time setup
& periodic package updates (which includes the kernel).  As it's cheap
enough to be dedicated to simulation, it's not a disaster if something bad
does happen - as long as anything else on your internal network distrusts
the Pi & its guests.  If you put the emulated OS on the public network,
that's a bigger exposure than the host OS.

If you just provide SSH access, I recommend disabling passwords and using
RSA keys only.  It frustrates the script kiddies, and you don't have to
worry about password quality.

Cloud hosting has its own pitfalls.  I'm not a fan.

Someone mentioned running on a cellphone.  That's tough if you want remote
access because as frequently documented here, WiFi implementations don't
get along with SimH's networking.

Have fun.

 On 01-Dec-17 15:09, Hittner, David T [US] (MS) wrote:

You could also look at running a super-efficient 24x7 server at home to
minimize your electric costs.

In my last computer build where I was trying to maximize performance with
minimal power use, I put together an E3 Xeon Server with ECC memory that
pulls an average of 35W running a SIMH VM with idle enabled.

It’s all based on buying power efficient equipment. It runs near noiseless
and cool also.

Intel Xeon E3-1275v3 3.5GHz 4C with Integrated graphics (which is fine for
a server). Max 84W.

32GB ECC memory (overkill for SIMH, but I do other things with the server
 :-)

500GB M.2 NVME SSD

1TB 2.5” HDD

5.25” BLU-Ray ODD

80+ Gold PSU

Windows 10 Pro OS (for host)

VMware Workstation for virtualization, although you could use the built in
Windows 10 Hyper-V virtualization for free

2.5” disk drives and SSDs pull a lot less power than their rotating 3.5”
equivalents. So does using Integrated graphics vs. discrete video cards if
the performance is OK.

Your point about having others manage the network security is pretty darn
valid though !!

Dave

*From:* Simh [mailto:simh-bounces at trailing-edge.com
<simh-bounces at trailing-edge.com>] *On Behalf Of *Joseph Oprysko
*Sent:* Friday, December 01, 2017 2:37 PM
*To:* Dan Gahlinger <dgahling at hotmail.com> <dgahling at hotmail.com>
*Cc:* simh <simh at trailing-edge.com> <simh at trailing-edge.com>
*Subject:* EXT :Re: [Simh] C9.io

Dan, it is easy peasy, but not quite free, as if you want 24/7 access to
the box, you have to keep the system running 24-7, so electricity costs.
Plus, I’m planning on having others log in as well, thus I don’t want to
open up my network like that. That’s why I’m looking for a free
hosted/Cloud solution. That way someone else can deal with the rest of the
network security. I do enough of that for work anyway, don’t want to have
to monitor my home network as thoroughly.

On Fri, Dec 1, 2017 at 1:12 PM Dan Gahlinger <dgahling at hotmail.com> wrote:

A Linux box running simh bridged with nat

Easy peasy and free

Get Outlook for iOS <https://aka.ms/o0ukef>
------------------------------

*From:* Simh <simh-bounces at trailing-edge.com> on behalf of Joseph Oprysko <
joprysko1 at gmail.com>
*Sent:* Friday, December 1, 2017 1:09:37 PM
*To:* Ray Jewhurst
*Cc:* simh
*Subject:* Re: [Simh] C9.io

Well, running from inside a house and making accessible from the outside is
easy. But most ot my computers at home generally don’t run 24/7.

Mainly what’s needed for what we both want to be able to do isn’t really a
shell account on a shared machine, but literally a dedicated VM instance,
but we need to be able to access that instance through a public IP address.

On a home network, a private IP Address (192.168.x.x, 172.x.x.x ‘actually I
don’t think it’s the whole 172 network’, or a 10.x.x.x) it’s easy enough to
setup port forwarding to make it accessible. But on the Cloud based VM’s, I
don’t know if there is a way to do it. Well, I know there ARE ways, usually
involves paying for the instance, an external address, and possibly the
amount of traffic.

Actually, I know Bluehost (is it still a thing?) used to  give you a VM
with public address in combination with their hosting/domain name service.
But I’m hoping to find one that will not cost me anything.

On Fri, Dec 1, 2017 at 12:21 PM Ray Jewhurst <raywjewhurst at gmail.com> wrote:

I have been trying to figure out a solution for something similar to that.
I want to be able to run a PDP-11 outside of my house for Fortran
development. I would be running it on my Android phone.

On Dec 1, 2017 12:11 PM, "Joseph Oprysko" <joprysko1 at gmail.com> wrote:

Does anyone know if I can use the Cloud9 IDE to host a simh System
emulation?

I know I’m able to build and execute it in the environment, but what I’d
really like to achieve is to have a system (or several) running on various
instances. And be able to connect to them from an external IP address, I
believe I am able to SSH into an instance, or access it through the web
based IDE.

An example might be better. Say I setup an HP system running Time-Share
Basic. Would I be able to telnet to the TSB instance from various computers?

Thank you,

Joe

-- 

Normal Person: Hey, it seems that you know a lot.
Geek: To be honest, it's due to all the surfing I do.
Normal Person: So you go surfing?
Normal Person: But I don't think that has anything to do with knowing a
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Geek: I think that's wrong on a fundamental level.
Normal Person: Huh? Huh? What?

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-- 

Normal Person: Hey, it seems that you know a lot.
Geek: To be honest, it's due to all the surfing I do.
Normal Person: So you go surfing?
Normal Person: But I don't think that has anything to do with knowing a
lot...
Geek: I think that's wrong on a fundamental level.
Normal Person: Huh? Huh? What?

-- 

Normal Person: Hey, it seems that you know a lot.
Geek: To be honest, it's due to all the surfing I do.
Normal Person: So you go surfing?
Normal Person: But I don't think that has anything to do with knowing a
lot...
Geek: I think that's wrong on a fundamental level.
Normal Person: Huh? Huh? What?

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