What makes "FOCAL" FOCAL?

[Orome]

(04-14-2020 06:49 AM)mfleming Wrote:  If you are looking for differences in the programming semantics (i.e. opcodes), then I would point to the soft END as a distinguishing feature of the HP41, compared to prior models...

Can you say more about why you think of this an any different semantically from label addressing generally?

(04-14-2020 06:49 AM)mfleming Wrote:  ...move functions between main memory, extended memory and external storage...At this point you were starting to abstract the underlying hardware model.

That doesn't sound to me like abstraction (it sounds more like explicitly worrying about it).