🚀 go-pugleaf

Here is a quick summary of what I gleaned from responses
to my "Help! Hot memory?" request for information.
-
There are three possible problems:

     1. The MMU chip is not seated properly or makes faulty
        connections when it is hot.
     2. There is a pin socket on the memory expansion
        board that makes a faulty connection with one of the
        pins of a memory chip when it is hot.
     3. One of the memory chips fails at least partially
        when it is hot.

The narrow vertical lines on the screen "indicate that particular bits in each
word of memory are not functioning". H. C. Edelmann, from the University of
Karlsruhe, very
kindly posted a program on March 15 which allows testing
of the individual memory chips and their contacts.

My thanks to all of the people who took some time to reply
to my request for help.  Each response was useful.

Bill Moore