[Coco] Coco 3 Crashes shortly after booting NitrOS-9 v3.3.0

[camillus.b.58 at gmail.com]

Could it be that you overwrite some basic or garbage stack?  Looks like when returning from the disassembler the jump  back to OS9 is corrupt and the cpu jumps into oblivion, = crash. If the return address is on the stack, and that is overwritten, then the coco can’t return and crashes.


I’m not an expert but this happened to me in the past, because I was doing some assembler, but had no clue back then to use the U stack for keeping household of return addresses.


So just a thought, because the problem you describe was exactly what I experienced.  Those things one does never forget…LOL


cba aka Camillus






Sent from Windows Mail





From: Kip Koon
Sent: ‎Wednesday‎, ‎August‎ ‎13‎, ‎2014 ‎10‎:‎43‎ ‎PM
To: CoCoList for Color Computer Enthusiasts





Hi Coco 3 Hardware Experts!

I have a Coco 3 with 512KB Memory that passes the MEMTEST.BIN program just
fine so I know all the ram is good.  After booting NitrOS-9 I disassembled
BASIC09.  After the disassembly is complete, the very next key I press
crashes NitrOS-9.  This is happening on my main Coco 3 system and the TEST
Coco 3 I use for testing.  I have pulled the GIME chip out of the Test Coco
3 and reinstalled it.  The Coco 3 still crashes after one disassembly of
Basic09.  Do I have a possible thermal problem or is there any other issues
to consider?  Thank you in advance for any help you can give.  Take care my
friends.

 

Kip Koon

 <mailto:computerdoc at sc.rr.com> computerdoc at sc.rr.com

 <http://www.cocopedia.com/wiki/index.php/Kip_Koon>
http://www.cocopedia.com/wiki/index.php/Kip_Koon

 <http://computerpcdoc.com/> http://computerpcdoc.com/

 

 


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