Re: EMC Help

> From: William Scalione <scalione@...>
> Ok, here are the results.
>
> Tried the P-166 chip in place of the cyrix with 32 Meg mem. - no help

I talked with Fred Proctor briefly about your problem and he said that if all
of your other parameters ('mem=' in lilo.conf and the base address specified
in the run and ini files) are correct (and I believe yours were), his best
guess was that something could've gone wrong with the rt patch or in the
kernel compile. He recommended doing exactly what you did in the next
sentence.

> Reloaded the whole works linux, rt stuff, emc using your?, Tim's?
> script.

Tim's! (giving credit where it is well deserved)

> EMC actually loaded. no more segmentation faults. finally.
> have not hooked up my machine to it yet, but it really runs.

Did you do this with the Intel cpu?

> Tried the cyrix chip again just for fun. - Damn those segmentation
> faults.
> maybe something in the way cyrix addresses memory?

So, your system worked after you brought it up with the Intel chip, but seg
faulted with the Cyrix processor and was then OK again when you put the Intel
chip back in?

If this is the case, I think that the BIOS on your motherboard isn't
configuring the special Cyrix control register(s) correctly for use with
Linux (or the tricky shared memory interface scheme used by rtlinux and EMC).
Perhaps something went wrong with the original kernel compile or some other
important thing got corrupted on disk... (I have to explain the initial
failure of the Intel cpu somehow!)

Anyway, I don't even like the sound of the ARR (Address Region Registers)
that are in the Cyrix cpu, but perhaps you could get it to work by further
patching your kernel with files from:

http://www.tux.org/~balsa/linux/cyrix/

Or, it may be that the Cyrix chip will never work with the shared memory
interface.

If it was me, I'd keep the Intel chip and move on to the next intractable
problem!

Matt