Nonpareil status

[Mark H. Shin]

Since it appears you are revisiting unfinished business with regard to Nonpareil...

I though I might mention some odd behavior I have noticed specifically for the 12C.

After running a self test, regardless of previous annunciator state, the D.MY flag is always set, and the compound flag C is always cleared.

Initial display:

Display after self test:

Display after clearing self test state:


This behavior was observed using 12C ROM contained in the nonpareil 0.77 (Windows) release. And also observed utilizing the so called "original" 12C ROM from the HHC 2021 USB drive.

As far as I can tell, the 12C is the only Voyager series that displays the behavior of altering any annunciator state.