26 Jan
2014
26 Jan
'14
12:23 p.m.
Lastly, my incorrectly seated quad extender card was
introducing
errors even after fixing the cable problems, and I wasted several
hours chasing that... I may invest in a hex-height extender card to
avoid this problem in the future!
This almost certainly doesn't apply to a PDP8/A, but in the 11/44, if you
put certain of the CPU boards on a hex-height extender you get all sorts
of errors (IIRC the chace memeory fails totally). I am not sure if it's a
noise problem or a timing problem,. Yes, I found that out the hard way.
-tony