1) There is now only one kind of primitive. External primitives have

1) There is now only one kind of primitive.  External primitives have
disappeared, and "user" primitives have the same status as "built-in"
primitives.

2) bin files only contain those primitives actually referenced in the
file.

3) Strings now always use 32 bit counts.

4) Interrupt code and mask manipulation has been rewritten.

5) Findprim outputs the list of primitives sorted alphabetically by
the linkage name.  This is used to advantage by the primitive
searching mechanism, which now uses binary sear