Posts: 1,792
Threads: 62
Joined: Jan 2005
Cyril --
You've already "maxed out" regular and extended memory with your configuation, as well as included the best ROM made by HP. There's not a whole lot of room for improvement, but here are a few ideas:
- The Math/Stat Pac would provide a few things that the Stat Pac alone and Adv ROM together don't provide -- hyperbolics, Fourier Analysis, and triangle solutions.
Price: about US$40
- An Infrared module, along with the 822240B printer will allow the 41 to print to the same printer used by the 42S, 17B/II, 27S, 28C/S, 48S/G, among others. Price: US$100+ for Pac; US$90(?) for printer
- A Naviagation Pac provides 8 kB of useful programs for navigational calculations and celestial-object locating. Price: US$100+ for Pac
- Save it for a Card Reader or Wand? Price: US$100
- A specialty module for advanced programming and other functions: e.g., Hepax, PPC
All above prices are eBay US, not including shipping. I have all three HP modules for my 41CX, but none extra for sale.
-- Karl S.
Posts: 1,162
Threads: 26
Joined: Aug 2005
Here's what I'd put in a CX :
ZenROM, HPIL Development module, HPIL module, card reader.
And in a CV :
Extended Functions, Extended IO, HPIL, card reader
(In fact I have 2 machines configured like that at the moment, along with others that I often change the modules in).
Posts: 887
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Joined: Jul 2007
I sure like having the ZENROM in my 41cx. There wouldn't have been any point in my getting the 41 in the first place though if it weren't for the HPIL. I've interfaced it to a lot of workbench equipment, not just the little printer and digital microcassette tape drive.
The Extended IO is nice to have with the HPIL, and I had them put it in the same module with the HPIL so it wouldn't take an extra port. So with HPIL, ExtIO, Advantage, and ZENROM, I have one port left, and I would like to put a double XMEM or an MLDL there.