Olivier is one of a many amazing brains on the HP Museum forum which was recently moved to
http://www.hpmuseum.org/forum/ in its new phpBB format. The non-forum part of the website is
http://www.hpmuseum.org/ . A few of these men have used programmable logic and microcontrollers to make HP-41 (my main interest there) calculator modules and transplant boards that dramatically increase the calculator's capabilities beyond what HP ever provided when the 41 was in production. I want to get Diego's
NoV-64 module which gives a dramatic expansion of RAM and ROM (flash), and load into it several older module images plus Ángel Martin's new
41z module which gives it a native complex stack and oodles and oodles of complex-number functions all written in assembly for best performance (unlike the
Advantage module which had some of its functions in user language) and his
Sandmath module image. He also has a Sandmatrix and another one or two. Even the manuals are outstanding, which is uncommon today. The
41CL is a transplant board you can put in the earlier (Coconut) HP-41's to replace the original board. It does not have an actual Nut processor, but emulates it, with, I believe, a microcontroller, at up to 50 times the speed of the original. It is a true emulation that allows plugging in the older hardware modules (such as the time module, bar-code wand, HPIL, etc.), and comes with the ROM images of over 180 modules already installed. Doing a "who's who" of the HP Museum forum would take some time, and I'm sure I'd leave out someone important.
