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Exception 3 error , what is it?

 
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Rob Blessin Black Hole
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Joined: 05 Sep 2006
Posts: 591
Location: Ft. Collins, Colorado

PostPosted: Fri Jul 14, 2017 3:59 pm    Post subject: Exception 3 error , what is it? Reply with quote

Hello NeXT Community: I'm getting exception 3 errors on Color station motherboards anyone know what they are , they all have old caps. Best Regards Rob Blessin
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Rob Blessin President computerpowwow ebay sales@blackholeinc.com http://www.blackholeinc.com
303-741-9998 Serving the NeXT Community since 2/9/93
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andreas_g



Joined: 30 Jan 2009
Posts: 415
Location: Austria

PostPosted: Fri Jul 14, 2017 4:08 pm    Post subject: Reply with quote

Can you tell what it prints exactly? Is it printed during kernel panics or on the ROM monitor?

Exception 3 is address error, meaning that the processor attempts to fetch an instruction from an odd address.
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barcher174



Joined: 07 Dec 2012
Posts: 556

PostPosted: Fri Jul 14, 2017 7:23 pm    Post subject: Reply with quote

I've fixed a few logic boards with this condition by replacing the caps.
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barcher174



Joined: 07 Dec 2012
Posts: 556

PostPosted: Fri Jul 14, 2017 7:25 pm    Post subject: Reply with quote

Also make sure you are populating the RAM in the right slot order. Slot zero is towards the edge of the board.
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Rob Blessin Black Hole
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Joined: 05 Sep 2006
Posts: 591
Location: Ft. Collins, Colorado

PostPosted: Fri Jul 14, 2017 8:23 pm    Post subject: Reply with quote

Hello Andreas and Brian: I was able to troubleshoot and identify the problem.
The key was having a separate NeXT slab .
As soon as I plugged the MicroSD into it with the same exception 3 error coming up I suspected the build image on the SD was bad.
I did a fresh DD image and it works. So I'm guessing anything with an exception 3 error has to do with either failing caps or a faulty hard drive or in this case a faulty microsd install.
So you we're right Andreas , the image was corrupt and Brian I think the first board has a failing cap as I see electrolytic fluid / My guess is the failing cap caused intermitant signals when the sd was booting probably corrupting the install on the sd , may be an electrical surge . I'm also guessing that this combo problem probably hoses a lot of hard drives just a theory.

Problem solved as it now boots on the color motherboards as well ... yeah. Thanks for your help!

PS I have those Color Turbo Boards I need to send you Brian, I'm going test them one more time and write notes.
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