I notice that on the cover of my HP-71B Owner's Manual there is a photo of an HP-71 that does not have the 'B' designation.
Was there ever an HP-71, without the 'B'? Just curious. If so, what was the difference?
Was there ever an HP-71?
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08-27-2001, 05:38 PM
I notice that on the cover of my HP-71B Owner's Manual there is a photo of an HP-71 that does not have the 'B' designation. Was there ever an HP-71, without the 'B'? Just curious. If so, what was the difference?
08-27-2001, 07:21 PM
I don't think there ever was a production machine called an HP71. But it's not uncommon for the machines shown on the front of manuals/books to be slightly different from the machines that were
08-27-2001, 10:47 PM
One more question. I have several of these 71Bs and most are similar. But I have one that was made in the first year and has an all plastic back. I don't think I have ever seen an all plastic back. How long were these produced with the all plastic back?
08-28-2001, 02:57 AM
As far as I know these are newer redesigned machines with updated ROM versions. The ones with the metal backplate have ROM version 1BBBB. Then came ROM version 2CCCC with the all plastic back. ROM 2CCCC is very hard to find as there were bugs and not produced for long time. The latest ROM is 2CDCC and again has all plastic back. The newer ROM machines appear seldom. Fortunately I've got one of these :)
08-28-2001, 04:34 AM
Hi,
Daniel Diggelmann posted:
On the other hand, I do have a sheet from HP detailing the very nasty bug in version 1CCCC, which had But no such sheet for rev. 1BBBB. Could someone please shed some light on the subject ? Thanks.
08-28-2001, 09:53 AM
My all plastic versions have very early serial numbers (1st year of production: 2439Axxxxx). Incidently, I have two with plastic backs and they have sequential serial numbers. The ROM version says 1BBBB. Or could it be that the plastic backs came out in the first year of production?
08-29-2001, 01:52 AM
Hi,
my Rev. 1BBBB HP-71's start with serial 2609A.. and 2610A.. and both have the big metal plate on the back side. Maybe HP had more than one production line for those machines. Raymond
08-29-2001, 02:30 PM
Both of my all plastic back models have 2439Axxxxx serial numbers and are ver 1BBBB. My metal backs are later serial numbers. Also, inside, my plastic back models don't have the flex circuit. They have the zebra type connector. The two case halves are sufficiently different that they can't really be interchanged. So, I'm sure the serial number for the plastic back models have not been switched. The serial numbers are stamped into the plastic. I wonder where one could get a history of these. This seems to be clearly a 1st year of production (1984) plastic back, which some say, came later than the metal back versions. The really interesting thing is that I have two, with sequential serial numbers.
09-09-2001, 09:01 PM
I know there was an article in a PPC issue. The name was "HP71 bug report". This one was clearly about the 1BBBB version. I don't have the magazine's number and page in mind now, but maybe I'll find it in the next days... I remember there was a lot of bugs in the UDF (User Defined Functions) routines... |
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