On 06/11/2020 02:29 AM, Mattis Lind via cctalk wrote:
If that would be the case I think the system would
fail
quite soon rather than on test 5. A guess is that this is
a memory problem.
Sure, once you call a subroutine and then try to return,
corrupted memory would throw the processor into never-never
land. And, that could leave the bus in a weird state,
perhaps with no valid memory or device selected.
Jon