Mint - "Coprocessor protocol violation'

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Mark_G
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Mint - "Coprocessor protocol violation'

Postby Mark_G » Mon Dec 11, 2006 8:06 pm

If I start Mint, I get always that error,

I placed already two different brand new FPU's in the falcon, still the same problem.

Does somebody knows what it means ?

Mark

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Postby [ProToS] » Mon Dec 11, 2006 10:46 pm

I can't say since I'm not a freemint addict (I prefer magic), but have you try a older kernel ?
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Mark_G
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Postby Mark_G » Mon Dec 11, 2006 11:15 pm

On 'comp.sys.atari.st', I found this, posted by Ronald Andersson :

I also got a gradual 'build-up' of copro violations, rising in frequency,
until I couldn't use the system. Fortunately I had seen similar things
on my TT much earlier, and found a fix for them then, and the same thing
worked on my CT2B as well.

Start by removing the FPU again, and if you notice any oxide on the pins,
carefully remove that. Then check if you can see any oxide on the socket
contacts and remove that as well. This may help a little, but it is only
the 'warming up' for the real fix.

Get a very sharp needle, and very carefully use this to 'flex' each contact
in the FPU socket 'inwards' (towards the center of the socket I mean) Make
sure that they are all a little strained by this, but not so much that they
are bent over or otherwise damaged. This requires a steady hand, good eyes,
and a rich amount of patience. You must be careful all the time, to avoid
damaging the connectors, and yet gain the necessary effect.

When all is done the socket should look almost exactly as before, except
that each socket connector sticks out a little more from its backing, just
a tiny fraction of a millimeter. That tiny fraction makes all the difference.
I haven't seen any coprocessor violations on either machine since I did this.



I'm not so a hero for such things, so I removed the FPU. :(

Mark.

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Postby stimpy » Mon Dec 11, 2006 11:50 pm

I was getting some problems with booting, that I narrowed down to the FPU. I'm not sure why, but I do have quite a bit of hardware hanging off the motherboard (Nemesis and MightySonic32).

On bootup, it was hanging around the point it loads the ext2 filesystem driver. Removed FPU, all was fine.
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Mark_G
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Postby Mark_G » Wed Dec 13, 2006 11:03 am

There are actually 2 options :

1. Is it Mint which gives the problems ?
2. Is the Copro not good placed in is holder ?
For that I'm searching a program that check at low-level the copro.

I'm pretty sure that the copro is OK. It's a brand new one, and I got the same problem with 2 of them.
I've done already a test with a diagnostic cardridge for the Falcon, but it didn't give errors for the copro.

I don't go to move the contacts, as mentioned in the previous post. I 'll try first with a special contact spray.

If somebody know some test program, let me know ?

Now I removed the copro and mint+xaaes+gemini works.

Needs however still some tweaking, but that's an other story.

Mark.

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Postby christos » Wed Dec 13, 2006 11:06 am

Try a benchmarking utility under single tos. I think kronos would do the job


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