thunter0512
Veteran Member
My new PDP-8/e had another weird fault which appeared and after about 20 - 30 minutes fixed itself.
The problem was that the system dropped out of the running state as if I had toggled the Halt switch.
The run-light turned off and sometimes toggling Cont would get it going for a few seconds and then it would halt again.
Sometimes Cont, Load Ext Load wouldn't do anything.
After a few power cycles and some head scratching the system recovered and now again works perfectly.
Any thoughts about possible causes?
These intermittent problems are very hard to diagnose and fix.
Hard errors are nice and fixable using DEC's excellent documentation and the great contributions on this forum.
I still haven't been able to work out what has caused the weird extended memory checkerboard core memory faults which I have not been able to reproduce for the past few weeks since I originally reported it.
Thanks
Tom
The problem was that the system dropped out of the running state as if I had toggled the Halt switch.
The run-light turned off and sometimes toggling Cont would get it going for a few seconds and then it would halt again.
Sometimes Cont, Load Ext Load wouldn't do anything.
After a few power cycles and some head scratching the system recovered and now again works perfectly.
Any thoughts about possible causes?
These intermittent problems are very hard to diagnose and fix.
Hard errors are nice and fixable using DEC's excellent documentation and the great contributions on this forum.
I still haven't been able to work out what has caused the weird extended memory checkerboard core memory faults which I have not been able to reproduce for the past few weeks since I originally reported it.
Thanks
Tom