|Re: Double Extended memory module HP41cx..|
Message #7 Posted by PeterP on 15 Mar 2008, 9:22 p.m.,
in response to message #1 by Geoff Quickfall
Cool overlay! I once went through the trouble of reading all the PPC, CHUU, Datafile, etc journals that are available on the various DVD's and print out and sort the articles into themes. So I have a bunch of articles that are related to double/tripple modules, some of them from the old days talking about normal memory modules. Some of the maybe more relevant articles for your effort can be found at:
PPC V8N1 p20 - Installing modules inside the HP-41C
PPC V6N7 p24 - 24c Ram Mod
PPC V11N1 p28 - Procedure for Module Doubling/Tripling
PPC V13N7 p21 - Procedure for Module Doubling/Tripling
PPC V11 N5 p3 - The BUtchers Block - Part III
(part II is about adding another module to the HP-IL.
if can be found at V11 N4 p16.
part I, the introduction about the layout of modules etc
it can be found at V11N3 p 6.
Lastly, the author, David White, I believe, can be found here on the forum...
I also have one page, handwritten from W&W about how to build 'Two X-Memory modules'. Alas, it is in German and not part of any DVD afaik
Let me know if you do not have access to the PPC journals mentioned and I shall find a way to get them to you (fax, mail. No scanner in reach right now...) You can reach me via email here, just make sure that there is a HP-41 reference in the subject line, as there simply is too much spam covering that inbox (sorry Valentin for borrowing your trick, I hope you do not mind)