Re: [CAD_CAM_EDM_DRO] Wanting to load up linux

thank you all ok so this may to small ok I will still
play with it can't hurt. I will keep looking for a
bigger P1 I have seen some for sale real cheep .What
would be the right size other that a 900 Athalon and a
one gig board LOL My brother just bought one back in
March Talking about fast WOW

Thanks group I think I may be bending a lot ears here
soon just laugh ok no YELLING ok

John


--- Jon Elson <jmelson@...> wrote:

>
>
> Tim Goldstein wrote:
>
> > There was a long discussion about a year ago about
> getting the real
> > time
> > extensions to work on a 486. Arnie (Anyone know
> what has happened to
> > him??)
> > did a bunch of research and suggested a number of
> modifications that
> > would
> > possibly make it work. Seems the problem is a 486
> handles the memory
> > much
> > differently than a Pentium class machine and the
> RT extensions were
> > written
> > assuming a Pentium. The summary is Linux will work
> fine on a 486, but
> > the
> > real time extensions will not so EMC is not
> usable.
>
> I don't think this is quite true. I think once you
> get the correct
> syntax to
> LILO to reserve the desired amount of memory for the
> shared memory
> region, and find the correct amount to reserve, it
> works OK.
> I think you specify the amount of memory in KB on a
> 486, and in
> MB on a pentium. The page size is different - 4KB
> on the Pentium,
> and maybe 1KB on the 486, I'm not sure. There are
> commands that
> set up segment registers for the shared memory
> region, and there
> might need to be changes in those commands so they
> map to the
> right address and number of pages. I think Arne
> sent some people
> the instructions on how to do this, or posted it to
> the drop box.
>
> Anyway, if this machine is equivalent to a 75 MHz
> Pentium, that might
> not be enough CPU power to do steppers, and would be
> marginal
> on a servo system. Xemc might do OK, but TkEMC is
> borderline
> on a 100 MHz Pentium.
>
> Jon
>
>

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