22 Jul
2013
22 Jul
'13
10:56 a.m.
What I don't get, the compleet 9830 is on the HPCC
DVD, and that's not the
The HPCC DVD/CDROM is essentally 'my' scheamtics, so it's not suprising
the 9830 turns up there. HPCC has started to cover larger HP machines
that are related to the handhelds (mainly becuase there is not enough new
stuff on the handhelds, because members are interested in the larger
machines, etc).
DVD from the HP calculator museum.
I seem to rememebr that the HP calculator museum guy only wants to
include 'official' stuff on his disks. It's his choice. I have not
refused him permision to include these scheamtics if he wants to.
But you also can download all the diagrams form the hp
computer museum site,
www.hpmuseum.net.
Indeed. There is a lot of useful infroamtion on that site, and not always
what you'd expect. For example, because HP sold a slightly modified [1]
Teletype Model 33 at one point, the full manuals for the Model 33 are
there (they are not, AFIAK, on Bitsavers).
[1] Many computer companies in the arly 1970s added a relay to the Model
33 ASR so that the reader could be started and stopped by the computer.
DEC, HP and Intel certainly did. The modifications were all much the
same....
What's also very helpful was for my, when I was
(with the help and advice
from Tony) fixing my HP 9830, were the HP patents from Eric's site
http://www.brouhaha.com/~eric/hpcalc/patents/
The patents tells you a lot about how the machine works and how the firmware
and routines are build and what they do.
The patents are useful, but do take care. For the HP9830, they describe
the early versio nof the memory system, which AFAIK, was only used on the
first 200 machines produced. Later machiens have a _very_ different
memorytiming circuit. The chances of finding the older version now are
close to zero I think.
-tony