NorthStar Advantage diagnostic disk wanted
john_a_s2004 at hotmail.com
Thu Apr 28 03:43:03 CDT 2005
I recently got my NorthStar Advantage up and working, it had suffered when I
first powered it on with a failed tantalum capacitor on a SIO board. I
didn't originally spot the soot and debris as the machine has two SIO boards
and of course the failed cap was on the hidden board :-) Followed advice on
earlier thread 'Smoke on the Horizon', I replaced the 6 tantalums with new
ones. I also now have a variac and the PSU was bought up gradually, no
problems at all on that side.
It now boots into either CP/M or NDOS 1.0.0, and on the latter it has GBASIC
which is the extended Basic supporting the wonderful graphics ability of
Unfortunately GBASIC often crashes with a 'RAM Parity Error' message, I
guess most of the RAM is OK else it wouldn't boot. The Technical Manual
refers to the dealers Diagnostic Diskette, and shows a series of tests to
identify faulty RAM chip. I don't wish to try and re-seat all the chips as
when I tried this on my Pet it has failed to display anything since (another
pending repair project).
I've just bought some hard sector floppies, so can send a blank floppy to
anyone who can copy the diagnostic disk for me, I would be very grateful.
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