15 Jul
2012
15 Jul
'12
5:32 a.m.
After we received a number of great debugging suggestions we decided
to replace the FDH-333 diodes that we used to repair the core stack
with 1N4149 diodes. Other PDP-8 owners have used 1N4149 diodes
successfully in core repair. We ran the Memory Address Test and the
Memory Checkerboard for quite a while with no errors. So, that issue
is fixed and now we can work on the spurious interrupt issue.
Thanks for the help.
--
Michael Thompson