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HP Forum Archive 03

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HP41C to CX internal upgrade
Message #1 Posted by Stephane Rosa on 31 Aug 2000, 2:33 a.m.

Hi,

I found my old HP41C in some drawer, and I've been amazed by the quantity of documents and stuff on the web ! I want it to be my calculator again.

I remember a very old french magazine having an article on "How to upgrade 41C to 41CX by doing some electronics inside the calculator, i.e. adding MEM and X modules BUT leaving the four external ports free).

Has anyone some experience on doing this ? I remember that 41C was pretty low in memory, and I'd like to keep external ports free for peripherals.

By the way, what is this "Advantage" pack ?

Thanks for any help Stephane

      
Re: HP41C to CX internal upgrade
Message #2 Posted by Steve on 31 Aug 2000, 5:48 a.m.,
in response to message #1 by Stephane Rosa

Personally, I'd just go and buy an HP41CX :-)

But, yes, it is possible to make a C into *almost* a CX by installing a quad memory, and X functions and a Time module internally. In fact you'd probably go the whole hog and fit two X Mem modules too.

But given the time and effort required, it would really be a labour of love rather than an economic decision (IMHO).

      
Re: HP41C to CX internal upgrade
Message #3 Posted by Thibaut on 31 Aug 2000, 9:03 a.m.,
in response to message #1 by Stephane Rosa

Hi Stephane,

You are French speaking, aren't you ? I'm locate din Belgium.

The advantage pack is an application pack with several maths and and other few functions.

      
Re: HP41C to CX internal upgrade
Message #4 Posted by Dave on 31 Aug 2000, 11:18 p.m.,
in response to message #1 by Stephane Rosa

C'mon guys! The obvious question to ask here is "what is the serial number of your "C"? I might trade you a CX for it!

            
Irrelevant chatter :-
Message #5 Posted by Steve on 1 Sept 2000, 5:25 a.m.,
in response to message #4 by Dave

Nah, I've already got one of those. :-)

(Insert geek info on serial numbers here)

Actually, I don't have a halfnut C, and my only opt 001 is a CV fullnut (from memory).

Any donations of calculators falling into the (numerous) gaps in my collection gratefully received!

Now, who was it that bought the 2 CV's with consecutive serial numbers on eBay recently?


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