So I am at it again after a year in hibernation.
Found the problem now... It turns out I missed Grants instructions on the replaced resistor on the CPU card. I'm not sure how it could have worked ,before the mod (if it ever worked), looking at the clock wave forms.
I've had it running memory tests on a few 16KByte memory cards I got from ebay some time ago and all looks good now.
/P
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