|An unabashed 41 user, especially now with the CL|
Message #39 Posted by Geoff Quickfall on 18 Oct 2011, 5:26 p.m.,
in response to message #1 by Michel Beaulieu
Started with RPN so that is were this essay begins:
25-25C-41C-41CX-42S and now back to the 41C with the CL conversion.
lets say 'personal preference'. You start out with RPN (1975 for me)and it becomes familiar. As each RPN generation comes to market you adapt your programs and continue.
Then comes the 41C, the ultimate, at the time, RPN machine. Yes, it ran HPIL and some of my lab equipment in the mid 80's. Mag cards, tape deck, floppy drive, plotter all in the era of the 8088. We had an 8088, never touched it, would have had to learn to do things differently while writing and researching and working. Besides the mainframe and the 41 performed flawlessly. Didn't need IO to the 8088 as I had back up galore.
Into the cockpit and it works wonderfully except for th dreaded ESD prevelant in the cockpit environment. Used it extensively in the cockpit from 1986 to 2009. Produced flight plans (1991) with it in Tapei when the typhoon grounded the flight planning computers. The F/O's laptop did not produce as accurate a flight plan as the 41 did.
In 2009 I went to the HCC2009 and was given a 42S. Wow, faster and just as easy to program EXCEPT for the lack of timing functions and a real time clock. All programs with minor rewrites worked. Never the less, once loaded and increased to 32K it worked with the IR printer but I was always concerned by a sudden 'Memory Loss' and all the work that would entail (14K of programs). So the 41CX was in the flight bag as backup.
Yes, I had a 48SX, 48G+, 48G and etc but I did not grow up with RPL. I did convert programs to RPL but was never happy with the learning curve (or my lack of ability ;-). On the other hand, had I never seen RPN and started with RPL as my first machine, then I may have another story.
Back to the 41CX, ALONG COMES MONTE with the 41CL and now the primary is the 41 again with a 42S backup. It has not suffered from ESD, nor Memory Loss at work. It is faster at some things then the 42S and as fast at others.
Here is a demo which I presented at HHC2011 showing an extended memory data base search comparison between the CL and the CX with identical 'calculator states':
cl versus cx
I guess my rambling can be condensed to this:
"You use what you are familiar with, be it the RPLs 48, 41, 50, 28 or the RPNs. For me it is the RPNs. And now with the CL board, speed is not a disability with the 41, nor is I/O or memory. I have four different fully loaded HP41CX's loaded into my single 41CL. I just switch from the Palynology computer to the flight computer with the execution of a short routine. I also have a PDA built into the memory.
I don't need graphing capability, or teaching tool and etc. It fulfils the need in the 21st century with the updated board and still works with the HPIL I have accumulated over the years.