HP-41C double memory module?

[Massimo Gnerucci]

(02-04-2016 08:07 PM)Dieter Wrote:  

(02-03-2016 10:04 PM)Hans Brueggemann Wrote:  afaik, there was never such an item produced by HP.

Thank you for your feedback.

In 1982 a German version of Bill Wickes' "Synthetic Programming on the HP-41C" was published. On page 2 a short experiment is described which uses a synthetic STO M, generated by a classic "module pulling" procedure. Here the user is instructed to set SIZE 063 with a regular memory module resp. SIZE 127 if it's a double one. Do you really think the author referred to a custom-made, hand-soldered module instead of a regular piece of HP hardware? Maybe someone has the English version of the Wickes book and report what's written there?

This is what makes me wonder. And somehow I also seem to remember other references to such a module.

But of course I may be completely wrong here – after all it's more than 30 years ago now. ;-)

Dieter

I have the english version I bought in 1980 (with Addendum to fourth printing) and this paragraph is on page 1; still referring to a double density module .
I never saw such a module, nor mentions of it in catalogs.

Maybe it was planned but, eventually, the project 41 soon evolved to the CV version making a quad-module more appealing to update the C units.