Re: EMC C code - Real Time DOS and Win 3.1

From: Jon Elson <jmelson@...>

> Well, it is not so simple, because EMC is not a single program, but a
> combination of several.

I never claimed it would be, but it could be done because it has been
done in the past.

> The final nail in the coffin of these OSs is that
> they offer NO PROTECTION to any program component! That
> means any mistake could cause the machine to run away! Very
> dangerous.

Linux can be unstable also, although the kernal has been greatly cleaned
up over the years. A true benefit of open source.

The problem with nailing this coffin is some customers insist on certain
tools and OSes being used, even if there is a better alternative.

P.S. I have started looking for a used laptop to run Linux/EMC on,
anybody
done this yet? I'll probably use steppers driven through the parallel
port
in some combination. The only problem could be is an X windows driver
for
a particular laptop combined with a non-standard parallel port. What is
the minimum umph the CPU needs to run EMC with steppers? I would assume
this would blow off the servo loops and unload quite a bit of CPU time.

Jim Eckman