Re: HP 28 Internal Photographs? Message #4 Posted by Raymond Del Tondo on 3 Jan 2008, 12:45 a.m., in response to message #2 by Randy
At least the HP-28S _is_ hackable.
Christoph Giesselink demonstrated a wired serial I/O on the Allschwil meetings
(with an HP-28S I gave him especially for this;-)
It was possible to send data in both directions, from and _to_ the HP-28S.
The demonstation was a proof of concept, the target of interest was the HP-42S,
or more exactly to check whether it will be possible to do wired serial I/O on a 42S-like machine.
Since the 28S and the 42S are relatively similar from the I/O point of view,
and the 42S is even expandable with RAM and an optional ROM chip,
with some effort it will be possible to make the HP-42S an I/O capable machine.
The only problems are things like effort/price ratio,
or in other words: Who would pay for such modifications?
I guess the answer would be near to 'noone';-)
HTH
Raymond
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