put on the first line of startup-sequence:
set echo on
so you can see where it stalls
...pah, too slow...
That's all too complicated. If you are using Os 3.9, simply put set interactive on at the start of the startup-sequence. This will hold the Shell on every line, will print the command being executed, and allows you to continue with RETURN, "n" to skip or q to quit the interactive mode.
I would probably guess that the P96 screen modes are missing, which might be the reason by the screen remains blank. Merry Christmas!
