Re: [ECOS] Redboot for MBX

[Gary Thomas <gary at chez-thomas dot org>]

On Fri, 2002-08-02 at 09:18, Barton Meeks wrote:
> --- Gary Thomas <gary@chez-thomas.org> wrote:
> > 
> > Have you tried to build & run a RAM version?  Make
> > sure that works
> > first, then look at the ROM problems.
> 
> Hmm, the RAM Redboot works fine. But to get the RAM
> version to work, the 860 has to be initialized at
> least somewhat to get to the RAM.
> 
> To be sure I didn't modify anything in the /packages
> directory, I just grabbed a CVS snapshot from your web
> page, and rebuilt the 8-bit ROM against that. I still
> get the machine check at 0xfe0021e8, which is the sync
> command right after the MSR is written to turn on
> address translation. Line 386 of vectors.S.
> 

You have a standard MBX?  When you get the machine check,
can you see the registers (using your BDM interface)?

> I'm using a Vision Ice BDM with SingleStep to download
> to RAM and burn the flash.  My mbx is 40mhz, and I'm
> using the "_40" version of the ecm files.

Actually, I was thinking you could try the RAM version by
first using a known working ROM version.



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