HP 35s musings


I got off the 35s bandwagon rather early. When I saw check sums and line entries, I know the drill. I finally found my old HP 65 code pads, but before I got very far, I decided that this was a piece of nostalgia I could do without.

I did work through most of the manual and had an overall favorable impressionof the calculator. However the lack of I/O left me with no means of saving my work. Lets face it, the batteries will go dead sooner or later. This is of course of no concern to many but it was important to me and possibly a few others.

Just before giving up, I had the idea of somehow aquiring the emulator. My resoning was if I kept the emulator and calculator syncronized then in a "round about way" I had achieved backup. Tedious yes, but no more tedious than code pads, check sums and lines. This proved impossible since apparently mere mortals cannot buy or possess the emulator.

The 35s was laid aside. Having come into sudden cash wealth from a recent 60th birthday (they really feel sorry for you when you get this old) I ventured into other calculator venues.

I am currently exploring another device. (I will not mention the name anymore, because I now realize I probably sound like I am on the payroll. I'm not). This vendor sells an emulator application. Not cheap either. Almost the same cost as the calculator. The interesting think about the emulator is the key code editor. As you use the virtual calculator the editor creates a key code file.
If I chose to share a program, funtion, list, or whatever, I could just forward a keystroke file to the recipient. Likewise they could do the same for me. You can easily load the file and even single step the key strokes and watch the emulator highlight the keys as they execute. (Some people are shaking their heads saying "where has this guy been", but be patient, this is all new to me).

So what am I trying to say?

If I had an HP 35s emulator that created keystroke files I think the following would be true.

1. I would have a "form" of backup without I/O. If I maintain the emulator, which to me is no more demanding than creating a paper trail.

2. I could easily exchange programs, data, lists, etc using keystroke files. I think this is actually less error prone than typing posts.

3. Paper documentaion, check sums, and lines would become moot.

The present 35s emulator may be capable of this but I don't know. Can anyone tell me?

If this capability were somehow made available I would be an aficionado rather than a detractor


I though about an online keystroke capture the day I got my 35s. Thought I'd give it a go when I get back to work (in six weeks), but hopefully someone will beat me to it. :)



Hi, Donald,

Supporting your opinion, I think that we may have a similar situation with calculators where simulators or emulators already exist, e.g. with HP42s. This is also a machine with no input, other than its keyboard. AFAIK, excellent Thomas Okken's Free42 simulator behaves pretty the same way as the real machine does.

Though I have never tried to do this with HP42s/Free42, maybe it would be also possible in a combination of HP41CX/ttCalc (also a simulator).

Edited: 11 Aug 2007, 4:52 a.m.

Possibly Related Threads...
Thread Author Replies Views Last Post
  Classic (and other) Keyboard Layout Musings Mark Henderson 18 585 12-27-2010, 09:47 PM
Last Post: bill platt
  More 35s Musings Chuck 2 217 07-27-2007, 08:21 PM
Last Post: Wayne Brown

Forum Jump: