03 May 2012, 05:24 | #1 |
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[Solved] 8100 0005 Guru in "exec.library"
Hi all!
My A1200 had been running for quite a long time without a problem but, a week ago, it started to malfunction... After investigating various parts, i.e., removing the Blizzard 1240T, replacing it with an ACA030/28, reinstalling the OS entirely from scratch... I managed to "consistently" obtain the same Guru although but never for a clear reason. Scout reports: Code:
Guru: 81000005 Task: $03000300 Fatal issue: deadend Sub-system: exec.library General: general fault Specific: corrupt memory list detected in FreeMem Help! Any suggestion of causes or tests to run? Thanks! Tygre |
03 May 2012, 08:46 | #2 |
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exec.library did not crash. exec.library detected that the memory list had been corrupted and then crashed the program which ran in the task defined by the task structure at address 03000300. I wonder why scout does not print the name of the task.
A corrupted memory list usually happens if a program writes beyond the size of an allocated memory block. It can also happen if the stack size is too small. Mungwall (in combination with Sushi or Sashimi) should be able to debug it if you can run it before the crash. When does the guru appear? The address looks much like the initial CLI. |
03 May 2012, 15:26 | #3 |
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Thank you very much Thomas!
I will try Mungwall (with Sushi or Sashimi) but the problem is that nothing particular is happening when the guru occurs, I mean, my Amiga can be runing, doing "nothing", for 20 minutes or 1 hour or more before the Guru happens. Maybe interesting is that other Gurus do occur sometimes, such as 8000000A "Line 1010 emulator error" but always with the same task at address $03000300. Does this address mean anything special, maybe in combination with the ACA030/28 board? Could it be a hardware malfunction... I don't know: could the Kickstart ROMs be "broken" or something? Thanks! Tygre Last edited by tygre; 03 May 2012 at 16:38. Reason: Typos |
04 May 2012, 15:10 | #4 |
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Hi!
I did install Mungwall and Sashimi and my Amiga ran all night without crashing but I am not sure why I followed the instructions in Sashimi doc.: I added the two lines in my Startup-Sequence Code:
Run >NIL: MungWall NAMETAG ; Run >NIL: Enforcer RAWIO Run >NIL: Sashimi CONSOLE BUFK=64 NOPROMPT ASKEXIT ASKSAVE Cheers! Yann Last edited by tygre; 04 May 2012 at 15:12. Reason: Added some thoughts... |
04 May 2012, 16:36 | #5 |
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No, I expected something like this:
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04 May 2012, 16:43 | #6 |
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Could it be that your Amiga cooled down over night and now runs better because it's not too hot any more. Random memory-related crashes can be caused by bad cooling.
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04 May 2012, 17:41 | #7 | |
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That's very much possible! I also just realised that my router was in a stange state... so maybe it caused the problem... or prevented the problem to occur. I ran more tests and, strangely enough?, Mungwall and Sashimi never report any error but my Amiga does crash/freeze one in a while and Scout reports:
Quote:
Tygre Edit: I saw it from my own eyes my Amiga was running fine, it even had top and meter from Executive running when, all the sudden, a Guru Meditation (the one above), with no warning at all! Last edited by tygre; 06 May 2012 at 00:27. Reason: Beautification |
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19 June 2012, 00:36 | #8 |
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Hi Thomas and all!
It seems that you were right on the mark I opened up my Amiga and installed it by the window (lots of cool wind) and I worked without problem for 2-3 days! So, I will now try to "cool" it, possibly following Rkauer's idea I'll keep you posted! Cheers! Tygre |
19 June 2012, 04:26 | #9 |
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I think you must check the voltage levels and the capacitors before start to add heatsinks. The heatsinks I used in one of my 1D1 Amiga was because is way too hot in my country at summer times.
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19 June 2012, 14:38 | #10 |
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Hi Rkauer!
Thanks for your advices and maybe you could help me: I had read in various places that the capacitors may have to be replaced but:
Thanks in advance! Tygre |
19 June 2012, 23:01 | #11 |
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All SMD electrolytic capacitors must be replaced, no doubt about that.
Through-hole capacitors might be in need of replacement. They are used as voltage ripple filters in spots where the power consumption is bigger, that's why the larger units are near the power connector and very near the floppy power jack. As all through-hole capacitors, those might not leak, but will dry internally over the years. Bulged capacitors and ones with shortened plastic labels suffered from overheating, indicating an urgent replacement. Pretty much the same as in pc motherboards (but those fails spectacularly sooner). Blame crappy chinese capacitors. The bad SMD units will look with a bulged dome, or a wet/oxidized/dull pad. But even if none of the visual effects are shown, the bad behaviour of the Amiga will point to those. |
21 June 2012, 22:17 | #12 |
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Hi Rkauer!
I didn't even know that they were two types of capacitors I was really only looking at these "through-hole capacitors". I am going to inspect the motherboard carefully now, I'll get back to you for more questions Thanks a lot for your explanations! Tygre PS. Could a kind moderator mark this thread as "solved" because the problem is with me now PPS. For reference, here is a link to a photo on Wikipedia showing the different types of capacitors (SMD, through-hole...) |
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