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Joined: Nov 2005
I could be way wrong, but when I used these drives about 100 years ago :-)....
I seem to recall that the 9114A was a single sided version of the 9114B. The differences then are that one has twice the capacity of the other.
The 9114A's I saw were rather more primitive inside than the 9144B's. but that may have had a lot to do with the fact that the 9114A's I saw were _VERY_ early production models. Many (all?) of the HPIB drives went through several revisions, sometimes changing the height of the case without changing model numbers.
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Joined: Jan 1970
I have one of each. The 9114B is cosmetically identical to the "A" model, and the only observable software difference is that it responds to the "ID" command with the different model number. Internally, you can see that the electronics of the "B" model is somewhat simplified. I have read (though not verified with personal experience) that the "B" model uses less power, and thus should have a longer battery life when in use. I have a manual for my "A" model which gives predicted battery lifetimes, so if someone has a "B" model manual, we could compare the figures.
Note that both models use _only_ the old single sided diskettes, and have identical formatted capacity.
grant..