It was neat to think it was Daphne while it lasted
I guess OCS was not fully formalised before Denise went into production or it was affected by a bug making it inoperable.
I note BBOAH also state
Also, some 8362 R5 chips (in developer/demo machines only), the HAM mode may not have been tested.
Which is an odd statement, as it does not outright say "HAM mode does not work" or that, but implies that chips may have been cherry picked or that it does not work on some R5's...
one could read a few things into that statement...