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OpenVMS Hobbyist Program | VAX Systems Forums | Emulated VAX Forum
Author SIMH on QNX
Kurt Svendsen

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Posts: 7
Location: Sydney, Australia
Joined: 21.02.09
Posted on March 06 2009 12:12
Just an uninformed observation.

These days delving deep underneath the hood is a distant memory, though I still have my IDSM somewhere safe, to wit, the esotericities are pretty much beyond me.

However it struck me in the past, when last thinking of such matters, that a port of SIMH to the QNX platform would be a *killer* combination:


Lean and mean.

Similarly with the Stromasys CHARON-VAX and CHARON-Alpha emulators.

Though in these days of mature roll your own GNU/Linux building, there are other options for rock solid reliable host building.

Informed or uninformed comment welcome smiley
Author RE: SIMH on QNX
Kurt Svendsen

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Posts: 7
Location: Sydney, Australia
Joined: 21.02.09
Posted on March 07 2009 11:13
All true enough.

However when you consider VMS, which can have an uptime of a decade, running on a hardware abstraction layer running on a host microsoft "BSOD'R'US" operating system, there is something dreadfully wrong with the picture.

Of course with tools such as "nLite" and your MS OS installation media you can make legit and relatively tight installation variants of MS OS, none the less, MS OS are still half baked at best, something out of the computing equivalent of Monty Python.

Running VMS on SIMH/CHAROn on MS OS, is akin to building a house on foundation pillars of mud-bricks.

It logically makes more sense to run the hardware abstraction layer on a host OS that is just as or more reliable than the guest OS.

So, in the example cited, QNX which is a RTOS for embedded systems, would be a natural pairing for SIMH and CHARON.

Of course with SIMH at least, one could build a small tight Linux distro, tuned specifically to running SIMH.

Why Stromasys doesn't support Linux and QNX as alternatives beggars the imagination, but that is by the by.

Best regards
Author RE: SIMH on QNX

Posts: 1
Joined: 31.05.10
Posted on May 31 2010 23:46
Stromasys does have a product for QNX, it's called FutureVAX, you will find a link here:


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August 04 2022
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