I tied DEV SEL L for my homebrew LPT to +5 and now F4 runs.
I am curious if the EAE is used with F4. The Language Manual says it
is, but it is only mentioned in one place. There is nothing else to
select using it or not using it. I looked at the sources for various
parts of F4 and can't see that any of the EAE instructions are used in
it although I also don't know that I have source for the floating
point library itself.
-chuck