Ok, I didn't want to do that again, but since two requests were posted recently you find here a number of drafts showing some opportunities present HP calculator housings allow. As mentioned elsewhere, most drafts were posted earlier already. With respect to the upcoming HHC2010, they are published here in a new thread to foster discussions about a new scientific RPN calculator. After all, these financial guys drove us into last crisis, now, HP, give the engineers a good, handy pocket calculator before they will do alike! ;)
First picture shows what's possible based on a 15C with minimal modifications:
You may note an INV prefix for inverting functions top left, and an arrow prefix for conversions (top right). Respective applicable functions are connected with a white dash. Everything else is old technology (no need to get used to something new, hurrah!).
With a little more effort, particularily a full dot matrix display (hey, a change after almost 30 years! How dare you!), one may reach something like this:
.
Similar layouts can be done easily based on
a 42S: , a 17BII Silver: , or a 35S:.
As many of you know, Paul Dale and me have started a 20B repurposing project some (many) months ago. This is our present layout:
.
Of course, we'll use the 30B HW now. There is a 49-page manual available for this draft already - if you want a copy please drop me a note.
This as well as all other drafts published here and the related documentation are subject to updates without notice. So, as written elsewhere already, comments, critics, suggestions etc. are most welcome, especially if some reasoning is included. Don't hesitate to ask questions you may have! Though you can't buy any of these models yet, maybe you may get one of them once when either our repurposing project will end successfully or a renowned calculator corporation which will not be named here will take the chance ... ;)
Ceterum censeo: HP, launch a new scientific!
FWIW,
Walter